Well don't feel too bad about $340.00 to replace all 3 actuators. Some knucklehead here wanted $450.00. Needless he's still waiting.
No doubt, it's a pain getting under the dash, looking up into dark, cramped space, then trying to reach into the tight places.Holy crap! It's damned near impossible to replace that thing without pulling the whole dash apart! Specifically, it's an incredible PITA to remove and replace those 5.5mm hex head screws because they face out toward the fender! Going in, I pessimistically estimated 30 minutes to complete the replacement. It took me two hours, but, in all honesty, half of that was spent trying to locate and retrieve first one of the screws, and then the socket when they dropped down inside there.
I don't think a Flex screwdriver or universal would work for that recirc actuator due to location and clearance issues. But I think a thumbwheel ratchet would have been just the ticket.No doubt, it's a pain getting under the dash, looking up into dark, cramped space, then trying to reach into the tight places.
I have found some trick socket tools that help. Seems like, I used the flex screwdriver on the last actuator I replaced. It's super handy for stuff like this.
As for 2 hours, you must admit, working on your own car makes you realize that maybe some of those outrageous garage prices aren't really so outrageous
As for repairing the actuator, it's not that far fetched. Years ago, I opened one up (off my 07 SS) and saw the damage on slow moving gear(s). I was able to re-position the damaged teeth such that they were never engaged by the mating gear. It's been working fine in the car ever since
BTW, a 7/32" socket is pretty danged close to 5.5mm, altho I have both
FWIW, that one is thumbwheel only, no ratchet. Altho I do have a larger, similar widget that does ratchet. Even without ratchet, it's still handy, especially when your hands are greasy.I don't think a Flex screwdriver or universal would work for that recirc actuator due to location and clearance issues. But I think a thumbwheel ratchet would have been just the ticket.
<snip>But after yesterday's "adventure", that is about to be rectified. Just ordered these little beauties ...
So why does it happen when the car is turned offThis is a common issue. The air conditioner/heater has several damper actuators for controlling hot/cold , vent selection and inlet selection (fresh air/recirculation). When they fail, which is not uncommon, they will make an annoying popping sound. This is usually due to a stripped gear inside.
They cost around 35 dollars plus labor to replace, which often takes the job over 100 dollars.
With the ignition on, and AC fan on low, try adjusting your hot/cold knobs, one at a time, to see if the noise starts. Then try selecting recirc. Next try selecting a different vent (feet, face, defrost). The idea is to identify which control causes the noise to start. That indicates which of the 3 or 4 actuators need replacing.
With that knowledge, you should be in good shape for getting it repaired without getting ripped off.
Not sure exactly why, but here is my theory. The HVAC controller calibrates the damper actuators by turning them on and watching for the current to surge indicating the damper has reached its travel limit. Then the controller powers the damper in the other direction until it stops, while timing how long it takes to reach the limit.So why does it happen when the car is turned off
Weird. I don't recall either of the ones in my car making a racket as soon as I got in the car. I had to start it before the racket began, and I think it always stopped when I opened the door to get out, but I can't swear to that.Not starts when I get in sometime one is own think it's one of the air vent flaps
Tony, do you have dual hvac controls (driver/pass.)? Can you tell which side of the dash is tapping? Driver temp bda is ~ above the gas pedal. Pass. temp bda is behind the left side of the glove box.I had to change the module in my car this past summer. The on nearer the firewall behind the glove box. That's the tough one. And the tapping would start when I unlocked the car, and go on for a while after I shut it off.
NOW, I hear tapping when adjusting the heat cold or hot.....?? Where is THAT Module?!?!?!