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    Pattio1's Avatar
    Pattio1 Posts: 1, Reputation: 1
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    #1

    Jun 26, 2010, 05:58 PM
    Honeywell t-stat & Water Furnace red light (drain)
    Hi,

    I noticed that our Honeywell Th8000 Series programmable thermostat had a red light on the top right corner of the white frame. I didn't even know there was a red light there. Upson inspecting the furnace, a Water Furnace E Series, we saw a red light next to the word drain. We have a geothermal system. I feel a tiny bit of air coming out of the registers, but not nearly as strong or as cool as it normally is. The temperature and the humidity in the house are rising.

    Any help would be greatly appreciated.
    Dave16103's Avatar
    Dave16103 Posts: 1, Reputation: 1
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    #2

    Jun 27, 2011, 07:24 PM
    I was ggogling because I have the same problem with my E Series. Did you find the problem?

    [email protected]
    abugirl's Avatar
    abugirl Posts: 1, Reputation: 1
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    #3

    Sep 6, 2011, 01:51 AM
    Our geo water furnace is doing the same thing. We found and cleared out clog, ran water through the hose, including the bit of clorox. System came back on after we flushed it and seemed fine for about 20 minutes—long enough to bring the house temp back down 7 degrees. Then red light came back on with "fault" flashing on the thermostat. We turned it off overnight and turned it on just now. Same thing. Suggestions?
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