Troubleshooting Thermostats
About this Project
A thermostat is a switch that senses temperature and turns your heater or air-conditioner on and off accordingly. Most homes have low-voltage units like the one described here. A transformer reduces power from 120 volts to around 24 volts and sends it to the thermostat. Some systems have two transformers, one for heating and one for air-conditioning.
Possible causes of thermostat problems include faulty wiring, a corroded thermostat, and a worn-out transformer.
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