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Thermostats, the Unsung Heroes of HVAC

Thermostats have been a staple in homes for years, yet they remain unsung heroes, rarely given a second thought as they go about their jobs. Furnaces get maintained.  Air conditioners get repaired, but the good old thermostat just keeps plugging along. So why would anyone want to replace theirs? Hot Flashes and Cold Chills If your thermostat is producing sudden temperature swings, it doesn't mean it has the flu. It means it's either failing to sense the ambient temperature of the room or zone it's meant to monitor, or it's sending inadequate information to the furnace or air conditioning system. You can give it the benefit of the doubt by performing a quick check. Turn off the power to the furnace, switch the thermostat's fan from auto to run, then open the thermostat's case and switch the wire on the R terminal to the W terminal. Now switch the furnace's power back on. If starts up, the thermostat is bad and it's time to have it...
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