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I have a blue flame gas vent free wall heater that does not stay on I belive its the o2 sensor can i replace it?

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You probably have soot in the gas orifice causing low pressure flame that does not keep the thermocouple energized.

Posted on Sep 29, 2009

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My heater runs for about 10 minutes then the flame cuts out and can't be turned on again till it cools down for half an hour...


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Replace the flame sensor, if that does not fix the problem, check the thermostats, if it cuts off in ten minutes and then restarts when cooling down, then it is either flame sensor or thermostats.

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We had a problem keeping the pilot light to stay on, and this site recommended that it could possibly be the thermocoupler that was causing our problems also. We ordered the thermocouple, put it on,hooked it back up and it worked great! Thank you so much.
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