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Gadestroyer74's avatar
Nov 14, 2014

1993 Dutchman thermostat upgrade to digital

I am trying to upgrade my furnace thermostat. To a Honeywell rth221b . The only thing my furnace thermostat does is operate the furnace only. No ac or fan control. I can get it to turn the furnace on but it will not turn it back off once it's reached the desired temp. My furnace is a dura flame. I have a blue wire red wire white wire green wire and yellow. I out the wires into the slots with the letters initials. Everything is working right except it's not turning the durance off any help here ?

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