A/C and Recirc LED Flashing Simultaneously

FAILED COOL-DOWN TEST.
1. Determine if the refrigerant system is operating correctly:
- Check the outlet air temperature
- Feel the compressor suction plumbing, is it hot?
2. If not OK, go to Step 3. If OK, repeat the Calibration Diagnostic and Cool-down test.
3. If system does not seem to be operating correctly, perform diagnostics for poor performance:
- Low refrigerant charge
- No charge
- Compressor not operating

COOL-DOWN TEST
Verify that the test was done with the evaporator at room temperature. The test consists of starting the compressor and measuring the time it takes for the evaporator temperature to fall 7°C (20°F). If the compressor has been running, the evaporator is cold already and will not be capable of falling 7°C (20°F). If the test was run with a cold evaporator, turn A/C off and turn the blower motor switch to high position for 3 to 5 minutes till the evaporator is to room temperature. Then repeat the Calibration Diagnostic and Cool-down test.

WON'T PASS COOL-DOWN TEST
If refrigerant system is performing properly and the system will not pass test. Repeat the Calibration Diagnostic and Cool-down test to determine if the evaporator temperature FIN sensor has developed an open or a short circuit. If the HVAC control module still passes Calibration test, verify Cool-down test manually with a pocket thermometer. The outlet air temperature must drop at least 7°C (20°F) within two minutes. If the vehicle passes with the manual thermometer, take HVAC control to level 4 (evaporator probe temperature readout) and repeat the Cool-down test. Ensure the evaporator is at room temperature before starting test. Check if evaporator probe will drop the temperature 7°C (20°F) in two minutes. If the Evaporator Probe is found to be faulty, check that the sensor is positioned in the evaporator fins properly. If not, correct and repeat test. If OK, replace the evaporator probe.

Once the repairs are completed, repeat the Calibration Diagnostic and Cool-down test. Repeating the test is necessary to clear the fault codes.