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Diagnostic Trouble Code (DTC) Displaying
The heater and the A/C programmer set the diagnostic trouble codes (DTC) for the air conditioning system. One of the following methods may display the DTC: The Scan Tool Display DTC selection The on-board method Press and hold the OFF, AUTO and the RECIRC buttons for 1 second. The DTCs will display for 2 seconds each, and then return to normal operation. Try it, does this work? it's from a '99 Buick Park Ave tech manual, for Automatic climate control, I'm trying to find out what is wrong with mine, it did not give me a code. |
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