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Old 06-28-2018, 09:52 AM   #10
Bill
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Join Date: Feb 2003
Location: The mountains of Scottsdale, AZ, and the beaches of Maine
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Good add, Gonzo. Thanks for taking the time to do it - it was needed. Let me suggest a couple changes.

In para 3,
Quote:
Now turn on switch on front of cabinet (switch is usually red and mounted on left side). Switch should illuminate when heating.
The switch actually illuminates while the controller is in the process of igniting the burner. When the burner ignites, the light goes out. I call it the "trying to light" light.

In para 4,
Quote:
to run furnace, move thermostat to a setpoint greater than ambient temperature. Fan will come on. After delay (I think 5 minutes) the igniter will be heard.
In my TM, at least, the delay is more like 10-15 seconds. During this time, the controller is using a "sail switch" to confirm that the fan is up to speed. It takes the fan a few seconds to move the sail, but 5 minutes would be tough to swallow.

Just FYI ...

Bill
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