When your HVAC system is not working and it seems as if it is a thermostat-related problem, the issue can sometimes be resolved by checking and repairing the wiring and connections at the back of your thermostat. However, when you took your thermostat off the wall to try to fix a problem, you found that a red wire had become disconnected. Now you have two questions. Firstly, you wonder whether a thermostat has to have a connected red wire, and secondly, if so, what is the red wire for. Every thermostat needs a red wire to function because the red wire’s main function is to provide 24-hour volt AC power from the transformer to the HVAC system, including the thermostat. Without a connected red wire the HVAC system cannot work. Thus, the red wire must be connected to your thermostat as it is literally the “lifeline” of your HVAC system.…
You’ve purchased a new thermostat and want to install it yourself. But you are not sure what the function of the blue wire in the wall is and…
Trane thermostats are designed to provide optimal heating and cooling solutions that offer you control over the HVAC system. They allow you to control the temperature of your…
If your Nest thermostat gives you an “E74” error code, it is notifying you that no power to the Rh wire is detected. When that happens, your first…
When you have to replace the thermostat in your home and you don’t have HVAC or electrical experience, you might be afraid to do the wiring yourself. You…
When you are troubleshooting an HVAC fault or have to replace a thermostat you might often get lost between all the wiring and their connections to the thermostat’s…
When you have to replace a thermostat in your house the wiring might become a problem. You have to decide whether you are going to splice the thermostat…
As most thermostats that are controlling household appliances such as air-conditioning and heating devices and furnaces need low-voltage power, there should be one or more transformers installed in…
When you have to install a new doorbell at your house, you have to decide what wiring to use. If you have different types of wire available in…
Thermostats come with several wires on them each of which serves a different function. These wires are colored differently to help identify what the wire is for. Among…
A typical Nest thermostat uses a C wire (Common Wire) to power itself. This C-wire doesn’t come with the thermostat, it should be already there in your previous…