When your HVAC thermostat’s display screen goes blank, you expect all systems to stop working. Usually, the air conditioner and the furnace can’t keep on working because the thermostat cannot control them anymore. But you are experiencing that while the display screen is blank the HVAC blower fan is still working. How is that possible? The main reason why your blower fan can keep on working when the thermostat’s display screen is blank is that the fan has its own power wire and circuit breaker. It works independently from the rest of the HVAC system’s power source. We’ll briefly look at how the blower fan normally works, list the main reasons for a thermostat’s screen to go blank, and then see why the malfunctioning of the thermostat doesn’t necessarily affect the fan. How your HVAC fan normally works It is a separate electrical system but necessary Although the HVAC blower…
If your thermostat doesn’t turn on the heat it can be very uncomfortable, especially on a cold winter’s night. You realize immediately that if you don’t get it…
When the temperature in your home is not as comfortable anymore as it should be, it might be because your Nest thermostat has started to cycle on and…
One of the main reasons people buy Nest thermostats for their HVAC systems is because it comes with a rechargeable built-in battery or replaceable AAA alkaline batteries. So,…
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…
There are HVAC thermostats available that not only attend to the temperature in your home but can also sense and even control the humidity level in your home.…
When you’ve decided it is time to re-organize your Nest-controlled HVAC system to provide different temperatures to different rooms in your home, you have to make a follow-up…
Nowadays, almost every homeowner is talking about their new multi-zone thermostats, and although you have a zoned home, you still have a separate thermostat for every zone. Now…
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…
Purchasing a new thermostat for the HVAC system in your home is not something you have to do frequently. When you then, due to circumstances, have to purchase…
Your home’s White-Rodgers thermostat needs to be programmed from scratch, or you want to make changes to already existing settings. Now you wonder whether you can do the…