Question about Hunter Fan Company 5/1/1 Programmable Thermostat

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We just bought a house that the thermostat had been removed and the wires were just coming out of the wall not labeled. The furnace is a Tempstar gas model 9MPT125L20A serial # LO13778617.As far as we can tell the furnace was bought 6-8-02. We bought a Hunter a progammable thermostat,serial #712086, that looks exactly like the picture you have here. Not knowing the wiring we just matched the colored wires and kept the red jumper wire that goes from RC to RH as we have no air conditioning with this furnace.We finally turned it on to try it and the furnace worked but now it won't shut off unless you manually go down and shut the furnace off. did we wire it wrong? Oh course after we bought the house my husband lost his job and we are struggling to make our house payments let alone to be able to afford to have a furnace person come here. Please can you help?

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The Red and White wires coming from the furnace are the only ones that call for heat. the Green wire turns on the fan continuously, the yellow is for AC. If you have another wire color, it may be a Common wire and should not be used if your t-Stat has batteries. If no batteries, it goes to the C screw.

Posted on Dec 30, 2009

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It sounds like you have a short in the t-stat wire. pull a new 4 wire

Posted on Oct 04, 2009

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