Answer by steve for Honeywell WiFi thermostat install
Please test before connecting two wires together one might be live the other ground. result bang.Steve uk engineer.
View ArticleAnswer by ThreePhaseEel for Honeywell WiFi thermostat install
Yes, you are right on track hereSimply connecting the light blue wire to the C terminal on your furnace control board (with the furnace turned off at the service switch or breaker, of course) will get...
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Honeywell WiFi thermostat install
My old honeywell thermostat did not have a C wire as it was ran on batteries. I did find a light blue wire when removing the old thermostat that was not being used. Looking at the furnace circuit...
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