The low-voltage thermostat used on residential and light commercial conditioned air systems is difficult to diagnose because of its complexity and the fact that it is used for several purposes in a heating and cooling system.

Question

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The low-voltage thermostat is used for several purposes in a heating and cooling system, including controlling the temperature, fan speed, and mode of operation. This complexity can make it difficult to diagnose problems with the thermostat.

The Low-Voltage Thermostat Used on Residential and Light Commercial Conditioned