Trane xl80 furnace error codes

There are certain error codes that might appear on the screen of a trane xl80 furnace. Before turning off the unit, here is a list of these codes and their meanings.

ad-3 – high limit

a-1 – flame not extinguished

The trane xl80 furnace error codes are used to check the performance and safety of the boiler. Below are the common codes that you can expect to be on your door.

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There are three common trane xl80 furnace error codes that you should know so that you can identify the issue and address it.

1) Error code A: Error code B: Error code C:

2) Error code A: Error code B: The furnace will not either shut down or reset

3) The pilot will not come on when you press the Start button