Direct Answer: A blank thermostat usually means a loss of power, often caused by a tripped circuit breaker, dead batteries, or a clogged "float switch" that has shut the system down to prevent a flood.

Before you call for a repair, check your electrical panel for a tripped breaker and replace the batteries in the thermostat unit. Transparency Tip: If your drain line is clogged, the safety "float switch" will cut power to the thermostat to keep the AC from leaking water into your ceiling. If the batteries don't work, give us a call to clear that line!