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    epohler Posts: 1, Reputation: 1
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    Nov 27, 2012, 06:13 PM
    Trane xe78 thermal protection device open?
    I jumped the two wire on the limit switch and the burners still did not fire up. The fans just start blowing cold air. The diagnostic panel flashes a light 4 times. I took out the limit switch and put a lighter under the thermal sensor and I can hear it click. And as it cools it clicks again. I ordered another. Waiting on that now

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