1998 Plymouth Voyager

If LEDs on A/C-heater control panel are not flashing, system has passed calibration/diagnostics and cool-down tests.
No calibration is required.
If rear wiper and intermittent rear wiper button LEDs are flashing simultaneously, actuators have not been calibrated, a previous calibration failure occurred, or calibration/diagnostics have failed.
Run calibration/diagnostics procedure


To enter calibration/diagnostics test, set parking brake.
Start and warm engine to normal operating temperature.
With engine idling, turn blower switch to high.
Turn mode switch to panel. Open all A/C outlets.
Move temperature lever to full cold.
Press and hold rear wash and rear wiper buttons simultaneously for 5 seconds (until all LEDs illuminate).
All LEDs should illuminate for 5 seconds. Rear wiper and intermittent rear wiper button LEDs will flash alternately during calibration/diagnostics procedure.
A/C and recirculation button LEDs will alternately flash during cool-down test.
After approximately 60 seconds, if only rear wiper button LED is flashing, calibration is successful and system is okay.
If rear wiper and intermittent rear wiper button LEDs are flashing, Diagnostic Trouble Codes (DTC) are present,


To exit calibration/diagnostics test at any time, press rear window defogger button, rear wiper button, recirculation button or cycle ignition off and then on.
Test will automatically terminate 15 minutes after calibration/diagnostics is entered.