I have a Trane XL 80 furnace that was cleaned last week. On turn on today, the gas supply shuts off about 4 seconds after ignition. I bypassd the thremal limit swtich and get the same result. Any suggestionms?[/QU
The flame rod in your pilot was not cleaned. these flame rods get a film build
up on them that you can't see. Take some emery cloth or fine sand paper
and clean the flame rod good and see if that works. Make sure the pilot flame touches the pilot head and goes around the flame rod. the flame completes the elect circuit so if the flame left off the pilot head it would break the circuit.
later Paul
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