Need some help with this. I have a 2009 LX 570 and about three years ago I had the dreaded cabin air filter replacement done incorrectly. The typical symptoms followed, which were lack of memory for the HVA system and delayed start . After searching this form, I found that it was probably the door and it come off the hinge so I reached in there and was able to snap it back and everything‘s worked great ever since.
Fast-forward to a month ago, my HVAC system started doing the same thing so last weekend I took apart the glove box to look inside and sure enough the door hinge had come off from the servo arm. I reattached it and it did not change anything, but it did keep memory, but still has a delayed start. A day later I was driving and I realized that the driver side was stuck in cold even though I put the system in the heat, it was blowing cold air on the driver side. The rear air heat works great and so did the passengers side after looking around I found the servo above the gas pedal and proceeded to remove it and in the process it started working just fine then I focus my attention back to the cabin air filter door and I noticed it wasn’t working so I took that servo apart, checked it and put it all back together. It worked after I installed it but soon after it stopped working.
So here’s my question I feel like there’s something going on other than the servo. I believe they are in perfectly working order. It’s just somethings not telling it to operate correctly. I pulled the code in the HVAC system and cleared the codes that are remaining which were 45 and 46. My question is this an HVAC amplifier or something else? Also, if anyone has a factory service manual, can you tell me which volume has the HVAC system in it because it might be worth my time investment to get it and check to confirm what exactly is out. Any help would be great!
Fast-forward to a month ago, my HVAC system started doing the same thing so last weekend I took apart the glove box to look inside and sure enough the door hinge had come off from the servo arm. I reattached it and it did not change anything, but it did keep memory, but still has a delayed start. A day later I was driving and I realized that the driver side was stuck in cold even though I put the system in the heat, it was blowing cold air on the driver side. The rear air heat works great and so did the passengers side after looking around I found the servo above the gas pedal and proceeded to remove it and in the process it started working just fine then I focus my attention back to the cabin air filter door and I noticed it wasn’t working so I took that servo apart, checked it and put it all back together. It worked after I installed it but soon after it stopped working.
So here’s my question I feel like there’s something going on other than the servo. I believe they are in perfectly working order. It’s just somethings not telling it to operate correctly. I pulled the code in the HVAC system and cleared the codes that are remaining which were 45 and 46. My question is this an HVAC amplifier or something else? Also, if anyone has a factory service manual, can you tell me which volume has the HVAC system in it because it might be worth my time investment to get it and check to confirm what exactly is out. Any help would be great!
