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

    Nov 23, 2006, 07:18 AM
    Noma THM303M thermostat
    I have a Noma THM303M 5+1+1 programmable thermostat. It has 4 settings for weekdays, 4 for Saturdays and 4 for Sundays. On Saturdays and Sundays I want only 2 settings--raise the heat in the morning and lower it at night. How do I get it to ignore the other two settings. Right now I've set 2 of them to duplicate the other 2 but that seems awkward. Any ideas?
    METT's Avatar
    METT Posts: 14, Reputation: 1
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    #2

    Nov 27, 2006, 05:33 PM
    Quote Originally Posted by Seamonster
    I have a Noma THM303M 5+1+1 programmable thermostat. It has 4 settings for weekdays, 4 for Saturdays and 4 for Sundays. On Saturdays and Sundays I want only 2 settings--raise the heat in the morning and lower it at night. How do I get it to ignore the other two settings. Right now I've set 2 of them to duplicate the other 2 but that seems awkward. Any ideas?
    You may also set 2 programs to same temperature but slightly different time. For example P1 at 9:00am, P2 at 9:20am. And P3 at 6:00PM, P4 at 6:30pm.
    vacwm's Avatar
    vacwm Posts: 12, Reputation: 2
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    #3

    Jan 6, 2008, 02:23 PM
    METT is right on that is what I have done with 1 which I have installed. Seems to work fine.
    The problem that I am having is the reseting issue.
    I still have not figured it out. It seems a lot of people have this reset to default problem with this noma model.
    alex0451's Avatar
    alex0451 Posts: 2, Reputation: 1
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    #4

    Feb 26, 2009, 08:40 AM
    vacwm

    I also have the resetting issue but I found the source of the problem. A relay in your system is probably creating a surge on your 24v system that gets through your thermostat relay and reset your thermostat. I found yesterday that if I manually start the fan relay by shorting the wire connection screw with a screw driver (bad connection that creates spark and surge) is automatically reset the thermostat. This problem should be easy to corrected by adding a MOV (Varistor) on the AC line(+-5$). I will try that this weekend and I will keep you updated. Too bad I'm a year too late...
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