maxwell
Active VIP Member
Upgrading my thermostat. Have a new Honeywell wifi thermostat. My old thermostat only had two wires. Hooked to R and W on my furnace panel. My new thermostat says I need a C wire 24v common. My system is HEAT only and I don't need to control the fan separately. There is a C terminal on the furnace panel. I am wondering if I need to run a separate wire for the c wire and have all 3 wires hooked up on the new thermostat. Or can I switch the R wire over to the C on the panel.
Thanks
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Thanks
Sent from my iPhone using Tapatalk -