Thermostat wiring guide

Take a picture of the wiring on the old thermostat. Remove the face of the old thermostat. For mercury thermostats you will find 2 covers or compartments. The first which holds the mercy and the second where the actual wiring is. You will need the screwdriver to unscrew the two covers to access the wiring. Remove the old thermostat.

Thermostat wiring guide. The most common configuration of a 4-wire thermostat is: Red, R wire: This carries the 24V power supply and is responsible for the functioning of the thermostat and communicating with the HVAC system. Insert it into the R or RC terminal. White, W wire: This is the heating wire and signals the heating system.

This type of wiring is for thermostats that controls a boiler. Since boiler does not need a cooling function or the fan function, these two wires are not found here leaving three wires mentioned as below: Red wire for 24-volt hot. White wire for heat. Blue wire is the common wire (common wire can be of any other color)

The blue wire usually connects to the C terminal on the thermostat. It acts as a return path for the electricity supplied by the red wire from the transformer, thus forming a complete circuit. Sometimes, the blue wire might be used for second-stage cooling systems in 7-wire and 8-wire thermostats.When it comes to installing or troubleshooting a Goodman furnace thermostat, proper wiring is essential for optimal functionality and performance. However, there are some common mi...This step is crucial for understanding the correct wiring connections. 3. Identify the Wires. Next, identify the wires that are coming out of your HVAC system. Each wire will have a specific color and function. Common wire colors include red (power), yellow (cooling), white (heating), green (fan), and blue (common). Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store. 1 69-2487ES—01 RTH7400/RTH7500 Series. 1Turn Off Power to Heating/ Cooling System. M28097. 69-2487ES—01 2 Advanced Installation Guide. Remove old thermostat but leave wallplate with wires attached. 2Remove Old Thermostat. RET230P Electronic Room Thermostat Wiring ELECTRONICS N L 1 2 3 ON OFF COM OUTPUT 230 Volt AC 50/60Hz NO NC Link terminals L and COM/3 for 230V output 86mm 90mm Dimensions 88mm 84mm 60mm Mounting 28.2mm To wiring centre terminals* 3 2 N á á á L 1 N RET230P** Thermostat Model 3 2 RETB 1 2 4 RMT230 L 3 N RET230 …Page 1: Installation Guide T9 THERMOSTAT Installation Guide Online Guides honeywellhome.com... Page 2 Read before installing. Included in your box: Installation Guide Screws and anchors T9 Wi-Fi Thermostat Wireless room sensor Wallplate C-Wire Wire labels Adapter (optional) Tools you will need: You may need: Phillips screwdriver …

Commonly, thermostat wires are color-coded with the following scheme: red, white, green, yellow, and sometimes blue. These colors correspond to the specific functions that the wires serve in the HVAC system. Red wires typically carry the 24-volt power supply, while white wires are used for heating control. Smart Thermostat Premium works with most centralized residential heating and cooling systems. Heating: Up to 2 stages. Cooling: Up to 2 stages. Heat pumps: Air, Water, and Geothermal with up to 2 stages, and 2 stages of AUX heat. Accessories: Dehumidifier, humidifier, or ventilation device. Fan coil units: 2- and 4-Pipe with up to 3 …LED bulbs can be expensive up-front, but they more than make up their cost in energy savings over their lifespan (which can be measured in decades). Today at Best Buy though, you c...White – The white wire is what connects to the (auxiliary) heat on your system. Yellow – The yellow wire connects to your compressor. Green – The green wire connects to the fan. …The C wire is a low-voltage wire that provides power to your thermostat. It’s typically a blue wire that connects to the C terminal on your HVAC system and the C terminal on your thermostat. Without the C …Refrigerator – Fridge Thermostat Wiring Diagram Guide August 2, 2016 November 3, 2022 Sikandar Haidar 58 Comments In this post, you will learn about the fridge thermostat wiring diagram and installation, as you know that we use refrigerators in our daily life, in the refrigerator/fridge we have a knob switch which is a movable switch …Web connected thermostats are great, but they're expensive. If you want to make your own, blogger and engineer Nooganeer shows how to build one using a Raspberry Pi and an old iPho...Heat Pump Thermostat Wiring Chart Diagram - HVAC - The following graphics are meant as a guide only. Always follow the manufacturer’s instructions for both the thermostat and the HVAC system. Additional articles on this site concerning thermostats and wiring can help you solve your problem or correctly wire a new …

Get support for your WiFi Smart Thermostat, from installation and manuals to troubleshooting tips and replacement information. ... WiFi Smart Thermostat Manual & Support. RTH9580WF1005/U1. Download Manual Download Installation Guide Download Service Datasheet.Each wire color in a heat pump system has been standardized to represent a specific function. Red Wires. Red wires in heat pump systems are typically used to carry power from the heat pump thermostat to the system. This wire is often referred to as the ‘R-wire’ and is crucial for controlling the heating and cooling cycles of the heat pump.Room thermostat installation & wiring guide: this article series explains the basics of wiring connections at the thermostat for heating, heat pump, or air conditioning systems. Photo at page top: a vintage White Rodgers 1F56-444 room thermostat. InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers ...Table of Contents. Thermostat Wiring Basics. Components Involved in Thermostat Wiring. Common Types of Thermostat Wires. Thermostat Wires Color Coding. …

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Unused wire: Identify if the wire is also unused at the control panel. If it is not being used, label that unused wire with an empty sticker label. If the wire is being used, label it at the thermostat.; Two wires in one terminal: You may have a dual transformer system.; Incompatible wires: Stranded wires are not compatible. Important: If you don't have a C … Page 1 Thermostat with RedLINK™ THX321WFS2001W Programmable Thermostat Professional Install Guide Read before installing Package Includes: • T10 Pro Smart Thermostat THX321WF2001W depicted. • UWP™ Mounting System Other models may vary. • Standard Installation Adapter (J-box adapter) Search for local rebates. Step-by-Step Guide to Heat Pump Thermostat Wiring. Heat pump thermostat wiring forms an integral part of your heat pump system’s functionality. This section provides a detailed guide on how to wire your heat pump thermostat. Identifying Your System Type. Before you begin the wiring process, it’s crucial to identify the type of heat pump system …

6. Compare the wiring at your control board with the wiring at your thermostat. Open the image of your thermostat wiring on your phone. Using the color of the wires as a guide, compare the wiring on your thermostat to the wiring on your system control board. Look for the wire connectors unknown wires attach to.Connect one supply wire to the red thermostat wire. B. Connect the black thermostat wire to one wire from each heater. C. Connect the remaining wire from each heater to the remaining supply wire. D. Make a 3-wire connection with the two supply ground wires and the ground screw in heater #1. For 240 or 208 volt, both black and white supply wires ...Contents hide 1 Vive Comfort TP-N-701 Non-Programmable THERMOSTAT 2 Thermostat Application Guide 3 Specifications 4 Installation Tips 4.1 Wall Locations 4.2 Subbase Installation 5 Installation Tip 6 Thermostat Quick Reference 7 Wiring 7.1 Wiring Diagrams 8 Technician Setup 9 Reference Vive Comfort TP-N-701 Non-Programmable …wire going into your old thermostat with the provided stickers. 3. If you have used the wire label C, please skip step 3 ... Tip: If you are replacing an existing thermostat, use the stickers as a guide when inserting the wires into the ecobee3 terminal blocks. 17 If you need help with the wiring, refer to the reference ...Mar 4, 2023 · Install the transformer, as necessary, per building code and manufacturer’s installation instructions. Make sure the power supply to the indoor unit is off. Connect the PAC‑US445CN-1 cable to the connector CN105 on the indoor unit control board. Connect PAC-US445CN-1 terminals using 18 AWG wire. 🔥 Download our FREE cheat sheet to find 28 tricks that can help you save on your electricity and heating bill each month: https://dashboard.mailerlite.com/f... Begin installation with the app: The Nest app’s step-by-step instructions make it easy to install and wire your thermostat, so use it as your main guide. Refer to this article if you need extra help. It’s essential to have the latest version of the app to complete setup. Download it from the Apple App Store or from Google Play. If you don ... User Manual / Owner’s Guide. These are the most common type of manual available and contain instructions on how to program and use your thermostat for heating or cooling. Sometimes these manuals also include installation and wiring instructions where there is not a separate booklet for reference.Wiring a thermostat is a simple step by step process that anyone can do. Most of the process is about following safety procedures and avoiding common mistakes. Once you know what type of system you have, the hardest part is out of the way. For complex systems like heat pumps and multi-zones, a professional is recommended.You may need screws and a screwdriver. Use the built in level to level it up. Connect the Wires: Please see the wiring diagrams in fig 2-5 Connect each wire to its …

Page 5: Thermostat Mounting Thermostat mounting 1. Push excess wire back into the wall opening. 2. Close the UWP door. It should remain closed without bulging. 3. Align the UWP with the thermostat, and push gently until the thermostat snaps in place. 4. Turn the power on at the breaker box or switch.

Remove your new thermostat from its packaging. Remove your existing thermostat from its mounting plate. Compare the two mounting plates. If they are identical (e.g. you are swapping an Vivint Smart Thermostat V2 for another Vivint Smart Thermostat V2), you may reuse the mounting plate and have no need to touch the wiring (skip to step 7). Step 2: Once you have identified the wires, remove the old thermostat and disconnect the wires from the terminals. Make sure to label the wires for easier installation of the new thermostat. Step 3: Take the two wires and strip off about 1/2 inch of insulation from the ends. This will expose the copper wire underneath.6. Compare the wiring at your control board with the wiring at your thermostat. Open the image of your thermostat wiring on your phone. Using the color of the wires as a guide, compare the wiring on your thermostat to the wiring on your system control board. Look for the wire connectors unknown wires attach to.Installation & setup guide 1 User guide 1 System Wiring Diagrams Fold-Out Sheet 1 Thermostat Unit Dimensions (H x W x D) Dimensions: 3-5/16 x 4-5/16 x 7/8 in. (84 x 110 x 22mm) Wall Plate Dimensions (H x W) Dimensions: 4-1/2” x 5-3/4” (114 x 146mm) Compressor Short-Cycle Protection (Compressor Protect) This thermostat is equipped …Contents hide 1 Tekmar 532 Non-Programmable Thermostat 2 Introduction 3 Features 4 Getting Started 5 Important Safety Information 6 Installation 6.1 Installation Location 7 Removing the Thermostat Base 7.1 Mounting The Thermostat 8 Thermostat Wiring 9 Testing the Thermostat Wiring 9.1 Switch Settings 10 User Interface 11 … Mounting System installation" on next page. Use the Optional Cover Plate when you need to cover. paint gaps from the old thermostat. 1. Before starting, turn the power off at the breaker box. or switch. 2. Mount the Cover Plate to the wall using any of the 6. screw holes. If you've got a mono amplifier, you've got a great opportunity to really bring on the bass. Mono amplifiers are especially well-suited to wiring to two subwoofers. To wire two subw...The way your old thermostat is wired is one of the best guides for how to wire up the Zen thermostat. Correctly identifying the wires that exist ensures that all the functions of your heating and cooling system will be able to be controlled by the Zen thermostat. If you are unsure or your wires terminals are unlabelled please contact your home ...CHECK PRICE & DETAILS ON AMAZON. Now follow the below-mentioned steps to install the Amazon Smart Thermostat. Step 1: First, turn off the power to your old thermostat. To do that, switch off the HVAC fuse in the electrical fuse box. Step 2: Open the faceplate of your old thermostat and check for high-voltage wiring.

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Step 2: Once you have identified the wires, remove the old thermostat and disconnect the wires from the terminals. Make sure to label the wires for easier installation of the new thermostat. Step 3: Take the two wires and strip off about 1/2 inch of insulation from the ends. This will expose the copper wire underneath.This step is crucial for understanding the correct wiring connections. 3. Identify the Wires. Next, identify the wires that are coming out of your HVAC system. Each wire will have a specific color and function. Common wire colors include red (power), yellow (cooling), white (heating), green (fan), and blue (common).12 Jan 2024 ... To install your Wyze Thermostat with a C-Wire: · Turn off the power to your heating/cooling system. · Remove your existing thermostat cover.wire going into your old thermostat with the provided stickers. 3. If you have used the wire label C, please skip step 3 ... Tip: If you are replacing an existing thermostat, use the stickers as a guide when inserting the wires into the ecobee3 terminal blocks. 17 If you need help with the wiring, refer to the reference ...Read also: Old Trane Thermostat Wiring To New Thermostat [Full Guide] Let’s take a closer look : Thermostat to air handler wiring. The air handler contains the blower that is controlled by the G terminal and the secondary heating (if you have auxiliary or emergency heat) which is controlled by the w2 terminals. So these wires have to go to …Thorough Guide to Thermostat Wiring. This article provides a step-by-step guide to thermostat wiring - from learning the wires' functions and removing the control panel to re-wiring any brand's device. By. Carolina …Install the transformer, as necessary, per building code and manufacturer’s installation instructions. Make sure the power supply to the indoor unit is off. Connect the PAC‑US445CN-1 cable to the connector CN105 on the indoor unit control board. Connect PAC-US445CN-1 terminals using 18 AWG wire.Thermostat Bosch CT 100 Operating Manual. Wi-fi enabled room thermostat (38 pages) Thermostat Bosch CR 50 Operating Instructions Manual. Ems 2 user interface (13 pages) Thermostat Bosch 8-733-944-325 Installation & Operation Manual. 2h/2c/hum touch-technology thermostat (24 pages) Thermostat Bosch TRZ 12-2 Manual.Programmable Thermostat Quick Installation Guide Tools you will need Tools you may need Wire stripper Needle-nose pliers Drill and drill bit (7/32 in) Included in your box Screws and anchors UWP™ Mounting System (UWP) RTH6360 Thermostat Quick Install Guide Small flat head screwdriver Phillips screwdriver Pencil Level. 2 Quick Installation Guide …White – The white wire is what connects to the (auxiliary) heat on your system. Yellow – The yellow wire connects to your compressor. Green – The green wire connects to the fan. …Connect one supply wire to the red thermostat wire. B. Connect the black thermostat wire to one wire from each heater. C. Connect the remaining wire from each heater to the remaining supply wire. D. Make a 3-wire connection with the two supply ground wires and the ground screw in heater #1. For 240 or 208 volt, both black and white supply wires ...Aug 3, 2023 · There are a few systems that can use the 6 (or more) wire thermostat wiring, these include. 2nd Stage Heat Pump. Heat pumps with Aux heat. Single stage Furnace with 2nd stage air conditioner. 2nd Stage Furnace with Single stage air conditioner. But you would also have other systems not mentioned above that use the 6 wire thermostat configuration. ….

connectors. You won’t need them. An R wire can go into either RC or RH. 3. Check your system If your old thermostat is labeled 120V or 240V or has thick wires with wire nuts, your system is high voltage. Not sure? Contact support. Breaker box SwitchMar 4, 2023 · Install the transformer, as necessary, per building code and manufacturer’s installation instructions. Make sure the power supply to the indoor unit is off. Connect the PAC‑US445CN-1 cable to the connector CN105 on the indoor unit control board. Connect PAC-US445CN-1 terminals using 18 AWG wire. Yellow – The yellow wire connects to your compressor. Green – The green wire connects to the fan. Orange – This wire connects to your heat pump (if you have one). Red – Now, there can be two separate wires for this. One is for cool and the other is for heat, hence the abbreviation “RH” and “RC”. Blue – This is your common or ... RET230P Electronic Room Thermostat Wiring ELECTRONICS N L 1 2 3 ON OFF COM OUTPUT 230 Volt AC 50/60Hz NO NC Link terminals L and COM/3 for 230V output 86mm 90mm Dimensions 88mm 84mm 60mm Mounting 28.2mm To wiring centre terminals* 3 2 N á á á L 1 N RET230P** Thermostat Model 3 2 RETB 1 2 4 RMT230 L 3 N RET230 …Nov 29, 2019 · How to Hook Up a Thermostat: Install the mounting plate. Clip a clothespin to the cable so it doesn’t slide down inside the wall cavity; then level the new mounting plate in position and mark the mounting screw holes. Drill 3/16-in. holes, insert drywall anchors and screw the plate to the wall. If the thermostat has back-up batteries, insert ... Step-by-Step Guide to Heat Pump Thermostat Wiring. Heat pump thermostat wiring forms an integral part of your heat pump system’s functionality. This section provides a detailed guide on how to wire your heat pump thermostat. Identifying Your System Type. Before you begin the wiring process, it’s crucial to identify the type of heat pump system …To install a Honeywell thermostat, remove the old thermostat, label the wires, and install the new thermostat by matching the wires up to the device. Use a screwdriver to pry the o... Refer to the device’s installation and setup guide for further guidance. Use the following procedure when a soft disable code is present: Confirm proper wiring between all devices such as thermostat and smart hub and cycle power. Go to the menu > settings > advanced settings > view dealer control center. Installation Guide 69-2389—03 6 ENGLISH DONE TUE 15 2010 6 TUE 1:00 PM MCR29746 MCR29484 Remove tab. Align pins on back of thermostat with slots in wallplate, then push gently until thermostat snaps into place. Remove tab and mount thermostat Set date and time Press st to set time Press st to set date Press st to set month Press st to … Thermostat wiring guide, thermostat that have wires in them • Do not use wire colors – enter the connector labels • Do not enter any jumper wires into the checker (see step 5) If your system is compatible, you’ll get a custom wiring diagram that you will need to install your Nest Thermostat. You can print it or email it to yourself. 4. Use the compatibility checker, Use the New Backplate as a Template. Use the new thermostat’s backplate and a pencil to mark the wall. Using a small bit, drill holes at the marks for the backplate screws. (Install wall anchors ..., Room thermostat installation & wiring guide: this article series explains the basics of wiring connections at the thermostat for heating, heat pump, or air conditioning systems. We provide Honeywell, White Rodgers & other thermostat wiring diagrams and explanation showing how to wire a room thermostat, including just what connections to make ..., Glossary C wire The “C” or common wire brings 24 VAC power to the thermostat from the heating/cooling system. Some mechanical or battery operated thermostats may not have this wire connection. It is necessary for establishing a Wi-Fi connection to your home network. Heat Pump heating/cooling system Heat pumps are used to heat and cool a …, Heat Pump Thermostat Wiring Chart Diagram - HVAC - The following graphics are meant as a guide only. Always follow the manufacturer’s instructions for both the thermostat and the HVAC system. Additional articles on this site concerning thermostats and wiring can help you solve your problem or correctly wire a new …, STEP 1. Power off your Heating, Ventilation and Air Conditioning (HVAC) system by using the master switch or circuit breaker box. This is important for your safety. TIP: Look for your master switch or circuit breaker box in the basement, attic, utility closet, or behind a wall panel near the thermostat. STEP 2., This exchange-traded fund is positioned to give investors exposure to companies taking meaningful steps toward reducing greenhouse gas emissions -- will it work and will it make yo..., Opening your Honeywell thermostat is a fairly simple and quick task. There are two different kinds of openings that Honeywell thermostats have. They either have a slide or swing op..., RTH2310 Programmable Thermostat 6 1) Match each labeled wire with the terminal having the same letter. 2) Loosen the terminal screws using a screwdriver, insert the wires, then tighten the screws. 3) Push any excess wire back into the wall opening. 5 Connect Wires (typical wiring) 5. Remove jumper if you have both R and Rc wires., Drill or make opening through wall for thermostat wiring 3/4” x 3/4” (19mm x 19mm). 6. Pull about three inches (76mm) of thermostat wire through the opening and removed outer thermostat wire jacket. This will help in routing the thermostat wiring to the proper thermostat terminals. NOTE: Thermostat wires and outdoor sensor wire, Thermostat. It should be installed centrally between two STRATA_HEAT Wire runs. Ensure that the sensor does not touch or cross over the. STRATA_HEAT Wire ..., Speaker lead wires are flexible braided wires that connect a speaker's terminals to a speaker's cone. From time to time, speaker lead wires wear down, break or loosen into an inter..., Let’s break everything step-by-step: Remove the thermostat. Take a picture of the properly positioned wires. Unscrew both wires from the terminal. Put new 2 wires in the thermostat in the same path as they were in the old thermostat. Put the control panel back once you’ve reconnected both wires. It’s as simple as that., Jun 19, 2023 · Thermostat wiring can seem like a daunting task, especially with the variety of wire colors and their respective functions. However, with the correct knowledge, this task can become much easier and can be done without professional assistance. In this guide, we will be explaining the common thermostat wiring color codes and their functions. , Thermostat Pro1 IAQ True Comfort T701 Installation Manual. (10 pages) Thermostat Pro1 IAQ T700 Series Operation Manual. (6 pages) Thermostat Pro1 IAQ T701 Operating Manual. Pro1 iaq t701 thermostat operating manual (4 pages) Thermostats Pro1 IAQ TT-N-701 Operating Manual. , Ensure the plate is level and mark where the screws will go. Pre-drill guide holes before adding sheetrock anchors. Before screwing in and securing the backplate, pull the wires through. Following the photo you took, reconnect the wires–checking twice. Last but not least, put the thermostat cover on and power it up., To achieve this simple. Put together the the Y, G and R H wire. If the compressor kicks on outside, then the problem is probably not with the system but the thermostat. IAnd if the system doesn’t turn on heat, the problem is not with the thermostat. Read also: 6 wire thermostat wiring diagram., INSTALLING THERMOSTAT. Unpacked the thermostat and open the case with a thin-blade screwdriver. Place between wall base and unit and twist to separate unit from base. Select a location for the thermostat about 5 feet (1.5m) above the floor in an area with good air circulation at average temperature., Overview of Different Heat Pump Terminals. As shown in the diagram, you will need to power up the thermostat, and the 24V AC power is connected to the R and C terminals. The color of wire R is usually RED and C is BLACK . C is known as the common terminal. These two connections will ensure that there is power to the thermostat that …, Step 1: Turn off the power to your HVAC system and remove the back panel of the air handler to access the thermostat wires. Step 2: Trace each wire that is connected to your …, Let’s break everything step-by-step: Remove the thermostat. Take a picture of the properly positioned wires. Unscrew both wires from the terminal. Put new 2 wires in the thermostat in the same path as they were in the old thermostat. Put the control panel back once you’ve reconnected both wires. It’s as simple as that., Vivint Element CT200 Installation Guide Z-Wave and Power Supply The thermostat’s node type is fixed when it connects to the Z-Wave network; if the C-Wire is not connected and is only battery-powered when connecting to the network, the thermostat will remain a frequent listening routing slave (FLiRS) node until it is removed from the network . When your …, The Honeywell T9 thermostat is a smart device that allows you to control the temperature and humidity of your home from anywhere. It comes with a user manual that explains how to install, set up, and operate the thermostat with your smartphone, voice assistant, or smart home system. You can also use the included sensor to monitor and adjust the comfort of different rooms. Learn more about the ... , Unused wire: Identify if the wire is also unused at the control panel. If it is not being used, label that unused wire with an empty sticker label. If the wire is being used, label it at the thermostat.; Two wires in one terminal: You may have a dual transformer system.; Incompatible wires: Stranded wires are not compatible. Important: If you don't have a C …, 24 Apr 2023 ... This guide will help you choose, install and wire a thermostat for your home heating system., When it comes to your Goodman furnace thermostat, proper wiring is absolutely crucial. The thermostat serves as the control center for your furnace, allowing you to adjust the temp..., Honeywell has made a business out of helping homes be more comfortable. Today, it is one of the leaders in providing solutions for connected homes, including delivering a variety o..., Based on Nest’s online compatibility checker data, the Nest Thermostat works with most 24V systems, including gas, electric, oil, forced air, variable speed, heat pump and radiant. It can …, Page 154: Wiring Guide - Wired Indoor Sensors ® ® THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE IAQ WITH EIM Wiring guide — Wired Indoor Sensors Use the S1, S2, S3, or S4 terminals for wired sensors. Wiring 2 TR21 sensors (20k ohm) and 1 TR21-A sensor CAUTION (10k ohm) for temperature averaging network. Select 20K in the …, This complete 24-volt thermostat wiring guide covers all thermostat wiring issues from the simple to the complex – from basic 2 wire thermostat wiring common to gas furnaces all the way to 8 wire thermostat …, Step-by-step Guide: Wiring a Trane Furnace Thermostat. Wiring a Trane furnace thermostat may seem daunting at first, but with the right guidance, it can be a straightforward process. Whether you are replacing an old thermostat or installing a new one, this step-by-step guide will help you wire your Trane furnace thermostat correctly. …, Thermostat wiring: in summary. Whether you’re having issues with your thermostat or want to upgrade to a newer one, knowing how to wire a thermostat is an easy and essential home improvement task. As long as you …, Aug 3, 2023 · There are a few systems that can use the 6 (or more) wire thermostat wiring, these include. 2nd Stage Heat Pump. Heat pumps with Aux heat. Single stage Furnace with 2nd stage air conditioner. 2nd Stage Furnace with Single stage air conditioner. But you would also have other systems not mentioned above that use the 6 wire thermostat configuration.