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Replacing the thermostat, took the old one off without marking the wires. Hooked it up by color and we get the furnace when we put it on cool. wires are green, red, yellow & blue (ground wire)on the wall. The new thermostat wires are red, yellow & green. Can you tell me which wires go where correctly?


Answers :

The normal wiring for stats is white=w=heat,red=r=24volts,green=g=fan,blue=c=common,yellow=y=cooling.
\015\012see what ties into your furnace board and match the terminals.

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