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Thread: Which thermostat will work with your system?

  1. #31
    Junior Member

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    Looking for recommendations to upgrade my current setup to wifi:

    Honeywell TH9421C1004 thermostat with THM5421C EIM

    Rheem RGLH-05EAUER gas furnace

    Carrier 25HBB330A300 heat pump


  2. #32
    Junior Member

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    Transition from 3 wire (no red) to wifi

    My old White-Rogers 1F35-910 thermostat has failed and is running constantly. It has 3 wires: white, yellow, and blue. It's so antiquated that I'm not certain which wires perform which function--see attachment. The home has hot water baseboard heat with 4 zones and no cooling system. I'd like to install a basic wifi thermostat. The home is a short-term rental in a cold climate, so these are the ideal features:

    *c-wire connection
    *ability to adjust temp remotely
    *bonus: ability to lock temperature range (so guests can't mess with the temp too much)

    The advanced systems such as Nest offer more features than I need, so I'm considering this lux/geo 7 day wifi programmable thermostat. Any insight on compatibility, wiring, or alternatives to that product would be much appreciated!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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