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

    Jan 16, 2012, 11:56 AM
    Noma prog thermostat model thm303m?
    I have a NOMA prog thrmostat model THM303M... the manual tells you to change the batteries every year... unit is hard wired... what happens if I do not replace the batteries what function do the batteries perform
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Jan 16, 2012, 04:55 PM
    Try it and see,, sometimes the batteries are not needed,, its according to how it was wired
    Sometimes they provide power for the light to work,,
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