2010 Chevrolet Impala A/C & Heater Blower

JACK34

MEMBER
2010 CHEVROLET IMPALA
FWD
AUTOMATIC
59,500 MILES

My A/C &Heater unit just stopped blowing air all of a sudden. I think it may be the freon due to a odor I smelled last week. The unit still blows air but not when I turn the level from low to high, it just stays the same. What could it be? It was hard to see if there was a leak due to the bad weather, but before the A/C Heat unit would not adjust to the level I turned the knob to, but have a realy long delay in adjusting the level. For example if I turned the knob all the way up and then turn it all the way down, the air would still blow at the high level for and extra min or so and then finally go down to the correct level.

2 Replies

TY ANDERSON

MECHANIC
719 POSTS

It sounds like you have an issue with the head unit or in other word the air condition control panel specifically with the fan speed switch. If it was freon related, a leak for example, it would not blow cold and you wouldn't hear/felt the compressor turning on& off. There is a possibility that the "blower motor control processor" (this device controls the fan speed) is defective or the electrical connections are poor.

The odor is most likely microbial growth on the evaporator causing a musty smell from the vents. Running the air conditioner with the recirculation turn off so fresh air can dry the evaporator. More humid environments cause cause this odor to become worst.