|Subject:||HVAC Operation During Remote Start|
|Models:||2006 – 2012 Chevrolet Impala|
|2006 – 2007 Chevrolet Monte Carlo|
This PI was superseded to update model and model years. Please discard PIC4019E.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
|OAT||48.2°F or colder (9°C)||Between 48.2°-82.4°F (9°C – 28°C)||82.4°F or warmer (28°C)|
|MODE||Detent 8 (Defrost -1)||Detent 2 (Bi-Level -1)||Detent 1 (Panel)|
|BLOWER||90% (Full Blwr)||45% (Half blwr)||90% (Full Blwr)|
|TEMP||FULL HOT||25% off Full Cold||Full COLD|
Note: It is also important to note that if the vehicle sits for less than 3 hours after key off, the Outside Air Temperature (OAT) uses the last stored value which may be incorrect by the time you get back to the vehicle. This can effect HVAC operation during remote start.
Note: If the HVAC does not function as above, it will be necessary to reprogram the HVAC control head with the latest calibrations if there is one available for the year and make of the vehicle you are working on.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.