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View Full Version : Heating A/C Thermostat screen is blank


draymer
Oct 15, 2008, 09:14 AM
What are the most common causes of a thermostat screen being blank? House is only 3 years old and I believe the thermostat is a digital unit.

hvac1000
Oct 15, 2008, 09:37 AM
Blown transforner
Blown fuse
Bad batterys
Power turned off to furnace
Defective thermostat