If your HVAC Thermostat is showing a blank screen or failing to turn on, don’t sweat it! AC Dave will highlight some common causes. If you need our assistance in diagnosing the issue and/or resolving the problem, please call us today to schedule an appointment.
Some thermostats rely on AAA, AA or even a 9 volt battery. As a result when the batteries need replaced your screen may go blank. HVAC thermostat manufacturers typically recommend replacing batteries annually to ensure reliable operation.
A tripped breaker, blown fuse, or loose wiring can cut power to your thermostat. You should call a professional HVAC technician in the following situations:
If checking your circuit breaker or fuse box reveals a tripped breaker or blown fuse, reset or replace it once. In the event it trips or blows again, call a technician, as this indicates a deeper electrical issue in the HVAC system.
If you suspect loose, frayed, or damaged wiring (e.g., after inspecting the thermostat’s wiring or noticing exposed wires), avoid touching it and call a professional immediately to prevent electrical hazzards.
If the thermostat remains blank after replacing batteries (if applicable) or resetting the breaker, the issue may stem from the HVAC system’s power supply or internal components, requiring expert diagnosis.
Also ensure that the thermostat is set to “on,” this is a common error. If you have verified the breaker, and the problem persists, a technician should be called to identify more complex issues like a faulty transformer or control board.
Should you notice sparking, burning smells, or unusual noises from the thermostat or HVAC system, turn off power to the system immediately and call a licensed technician straight away.
At AC Dave Heating & Air, our licensed technicians quickly pinpoint and resolve power-related thermostat issues. This ensures your HVAC system runs smoothly. Please do not risk DIY fixes with electrical problems. Instead, trust the experts! As your local, friendly licensed HVAC specialist, we’re ready to help. Call (661) 270 1961 to schedule a maintenance today!
