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View Full Version : Replacing thermostat which has 7 openings, but I have 8 wires


mikechug
Nov 15, 2011, 07:33 AM
The old thermostat has red, black, green, red, yellow, purple, orange, white, and only 7 "openings" on new thermostat and each thermostat (old and new) are labelled differently.

Which wires go where? New thermostat has y rc rh w-o/b g h2 h1. The old one had 1 unlabelled (purple); f(green); Y2(YELLOW); W1(WHITE); W2(BLACK); C(BLUE); R(RED); and o(orange).

Where do the new wires go? Thanks for the help