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My old thermostat is a goodman and the wires are Y G R O W2 E C the new thermostat we bought is a honeywell RTH3100C and the wires are E Aux Y G O L R B C have a connection for all except the L B wire where do they connect

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OK... You only need to use the wires that were already connected on the old thermostat.. the new thermostat will have extra terminals left over... The L and the B are for systems that require those or carry an auxillary device like himidity control etc.. Let me know how it works

Posted on Sep 05, 2010

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