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    zeydeshef's Avatar
    zeydeshef Posts: 1, Reputation: 1
    New Member

    Nov 9, 2009, 05:46 PM
    Temperature increases even after reaching programmed temperature
    I have a NOMA thermostat (model 52-2558-8). After reaching the programmed temperature, the furnace stays on without shutting down (8 degrees before I manually shut it off). Is this a thermostat issue or a furnace problem?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member

    Nov 9, 2009, 06:19 PM
    Does it shut itself off at or after the 8 degrees,, try setting the programmed setting 8 degrees less, see what happens
    EPMiller's Avatar
    EPMiller Posts: 624, Reputation: 37
    Senior Member

    Nov 9, 2009, 08:17 PM

    Check the wiring between the thermostat and the furnace. Both ends. That is the most common source of that type of problem. Maybe someone didn't follow common color codes, or terminals are not designated the same, or the furnace control is bad, or... Lots of things to check. Just eliminate one at a time.

    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member

    Nov 10, 2009, 12:14 AM

    Turn off furnace. Remove the W thermostat wire at the furnace. Turn on power. Furnace should stay off.

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