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If the rollout is still tripping has to be an issue with heat exchanger, Does flame float out of chamber?
Have you tried bending the bracket up about a quarter inch to keep the rollout from getting too hot? I have seen heat build up enough to trip these switches prematurely as calibration is not the best being most are cheap imports.
I see. Do you have a thermometer you can hold against rollout and verify if it is actually getting hot enough it should trip?
Yeah about the only thing that would make it trip is heat exchanger allowing it to get to hot due to a crack or bad gasket or the switch tripping prematurely.
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