Question about Williams Heating & Cooling
Take the red and white wires going to your thermostat and jump them together. If the unit starts, you have a bad thermostat. If not, at the furnace, jump out the terminals where the thermostat wires are connected to. If the unit starts, you have a bad thermostat wire or connection. If not, you will need to check for 24 volts at the gas valve while the thermostat is calling for heat. If yes, bad gas valve. If no, bad transformer.
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
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