Question about Honeywell CT87B ROUND HEATING&COOLING MECHANICAL THERMOSTAT - WHITE Heater
Get to the wiring at the thermostat. Take a small jumber wire and jump from R to G on the thermostat. Hold it there a few minutes to see if the system starts heating. If it does, you have a bad thermostat. If not, you have other issues.
Posted on Jan 18, 2008
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Posted on Jan 02, 2017
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