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What would cause AC thermostat to stop working?

Jason Miller, Thermostat Repair Expert

There can be several reasons why an AC thermostat may stop working. One common cause is a dead battery in the thermostat. If the battery is dead, the thermostat won’t have power to function properly. Another possible cause is a faulty thermostat sensor. If the sensor is malfunctioning, it may not be able to accurately detect the temperature, leading to issues with the thermostat’s functionality.

Additionally, a tripped circuit breaker or blown fuse can also cause the thermostat to stop working. If the breaker or fuse related to the HVAC system is tripped or blown, it can disrupt the power supply to the thermostat, rendering it non-functional.

If you have checked the battery, sensor, circuit breaker, and fuse, and the thermostat still doesn’t work, it is recommended to seek assistance from HVAC Alliance Expert. Our team of HVAC specialists can provide professional assistance with thermostat repair or installation. Visit our thermostat installation page for more information.

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