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Upstairs unit My gas heater will come on when you turn it on and fire up and run but before the cycle is complete it shuts off and will not come on it's own.You can turn it off and then back on and it will come on briefly and do the same thing.I have changed the thumostat to a digital one did not help so I replaced the limit sensor nothing ,got any advise for me?

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Clean the flame sensor....

Posted on Mar 08, 2009


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