Heat Pump Thermostat Wiring Chart Diagram - HVAC - The following graphics are meant as a guide only. Always follow manufacturers 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 thermostat.Some HVAC manufacturers use other colors for additional control points and it is why we advise you to read the manufacturers instructions. These charts and diagrams only represent the basic system. It is possible your system is equipped with additional HVAC components such as a humidifier or electronic air cleaner. Depending on the manufacturer and the designer of the components will depend on how the additional components are wired or integrated into your system or thermostat.Heat Pump Thermostat Wiring Chart DiagramHeat Pump Thermostat Wiring Chart DiagramThe Basic heat pump wiring for a heat pump thermostat is illustrated above. It corresponds with the chart below to explain the thermostat terminal functions.

Before uninstalling the old thermostat take a picture of the wiring with your cell phone before removing the wires. This way you have a reference. At the minimum draw a picture of it referencing the wires, wire color and what terminal the wire is attached to what terminal. The photo and the drawing reference can be used later to make sure you wire the new thermostat properly.portable ac unit for saleHeat Pump Thermostat Wiring ChartThis is for use for heatpumps. mobile home ac and heat unitsYou should 100% make sure that you have a heat pump system and not an air conditioner with electric heating strips as it is a common mistake for people to mis-identify their HVAC systems. no cold air from ac unitMake sure you do not make this same mistake others make.

Air conditioners are different because the reversing valve and defrost controls are unnecessary.Additionally, remember the RC/RH jumper is only for a heat pump system that has one transformer. It is possible your system could have two transformers. It is rare but still possible.You can learn more about thermostats, HVAC control, and browse a selection of thermostats here.Heat Pump Thermostat Wiring Chart DiagramI have told you before that the heat pump thermostat is completely different from the regular thermostat or an air conditioner thermostat. In this article I will explain to you the difference and I will show you how to replace it and how to hook up all the wiring.Most thermostats in general are very easy to install and yet most charge between $150 to $250 and it only costs $25-$50 and takes less than 10 min to install, so next time when you have someone telling you this is the holy grail of the thermostats, talks or it does this or does that, take my word for

it, he wants to rip you off, all digital thermostats work the same way , and most of them are programmable so don’t fall for that ..Now before we go any further let’s first understand what the thermostat actually does. The thermostat is nothing but a switch- yup you heard that right, it is exactly like your light switch. As a matter of fact, you can replace a thermostat with a light switch and the heat pump or the air conditioner won’t know the difference. only difference is that you turn the light switch manually but the thermostat will turn on or off based on a set temperature you can adjust.So the next time you are too hot and you want to turn your thermostat on don’t lower the temperature setting thinking you are making your air conditioner work harder. work any harder, it will just make the air conditioner work longer to meet your low setting temperature,it is not a gas throttle what is the different between an air conditioner thermostat and a heat pump

with the air conditioner: have a regular air conditioner you must also have a source of heating (mostSo when you need cooling your thermostat has to turn on the air conditioner (the compressor, the indoor blower and the outdoor fan), and when you need heating the thermostat has to turn on the furnace and the indoor blower. Thermostat uses 4 wires and one optional This thermostat is very easy to install and replace, and yet most contactors charge between $150 to $200 to do this. The thermostat only costs $25-$35 and takes less than five minutes to install.Remember, if you want to do this yourself.· Turn the air conditioner breaker off when you attempt to replace the thermostat.· Not everyone follows the same color code so always look at the old thermostat wiring. If the blue wire is connected to the Y terminal then connect the Blue wire to the Y terminal in the new thermostat.If you have a heat pump you don’t have a furnace since the heat pump provides cooling and heating. 

So when cooling is required your thermostat has to turn on the air conditioner (the compressor, the indoor blower, the outdoor fan and put the reversing valve in the cooling mode). When heating is required the thermostat has to turn on the compressor, the indoor blower, the outdoor fan and put the reversing valve in the heating mode. It also has to turn on the Auxiliary Heater if needed and Emergency Heat if needed.The reversing valve is either turned on or off. 99% of time the reversing valve is on when the system is in the cooling mode and it is off when the system is in heating mode.Some old heat pumps are reversed, meaning that when the reversing valve is active it is heating and when it is off it is cooling. Most thermostats have both options: - either O or B- don’t connect you want to do this yourself, Turn the heat pump breaker off when you attempt to replace the Not everyone follows the same color code so always look at the old heat pump thermostat wiring.