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    NJ Steve's Avatar
    NJ Steve Posts: 1, Reputation: 1
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    #1

    Jan 3, 2016, 10:38 AM
    Furnace not firing
    I have an OLD furnace. 1960's Richmond. No electronics. It's not firing up. I've replaced the thermocoupler and the 24Watt trans former. I fear it might be the gas valve itself. Is there any trouble shooting for an old Robertson gas valve?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Jan 5, 2016, 02:58 PM
    On old units like this, if you get 24VAC across the gas valve and it doesn't open, you either have a bad thermocouple or gas valve. However, there could also be a high temp shutoff that may be tripped. Look for that too. Honestly, by the time you spend $$ to repair something of this age, you should consider a replacement unit. Even at 80%, code minimum, you will find is saves you a lot of money quickly.
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