When a Carrier thermostat screen is completely blank, resetting and fixing the device requires addressing the underlying power supply or performing a hardware reboot. First, open the battery compartment if your Carrier model uses backup batteries and replace them with fresh alkaline cells. Second, check your home's main electrical breaker panel to ensure the dedicated HVAC circuit breaker hasn't tripped, and reset it if necessary. Third, turn off power at the breaker, access your indoor furnace control board, and check for a blown 3-amp or 5-amp low-voltage fuse caused by a power surge, replacing it if damaged. Fourth, remove the thermostat faceplate from the wall for sixty seconds and snap it back on to reboot the internal microprocessor. You can verify success when the screen turns on.
1 votes
Marked as accepted