I hooked up my honeywell rth111, the fan worked in the on position but not in auto. the furnace would not turn on at all. i have yellow, green, red, and white wires
Heating & Cooling - Honeywell - Programmable Thermostat Heater
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Answers & Comments
Possibly have the R and G crossed. Not sure, but your main 24 volts feed should go to R. If you get blower to run one of those 2 should be 24 v.