HVAC actuator or controller problem?
Thread Starter
Intermediate
Joined: Nov 2010
Posts: 48
Likes: 0
From: Madison AL
HVAC actuator or controller problem?
My 99 is throwing the usual HVAC codes 0361 and 0363. I've tried resetting the DIC to remove the codes, but they come back. I've pulled the fuse, but still has problem. The AC is working fine, but I have no heat and I can hear the actuator door moving back and forth all the time. Is it a controller problem or actuator problem?
Thanks,
Sam
Thanks,
Sam
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Not sure what fuse you pulled or if you used any specific process as you did not provide any useful information.
You also have to pull the correct fuse and it has to be done in a specific order.
Re-Calibrating Actuators
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).
Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
3. Wait 60 seconds.
4. Install the fuse.
This procedure resets the HVAC unit and must be done exactly as I have posted.
You also have to pull the correct fuse and it has to be done in a specific order.
Re-Calibrating Actuators
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).
Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
3. Wait 60 seconds.
4. Install the fuse.
This procedure resets the HVAC unit and must be done exactly as I have posted.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The OUTPUT gears inside the temp door actuators frequently crack. When that happens,, the actuator motor runs but the temp door doesn't change positions.
Sounds like that's your issue. Get a light, remove the close out cover in the drivers foot well and take a look at the actuator and see if the operator moves when you change temps.
You can always easily remove the drivers side actuator and inspect it. Some people have repaired the damaged gear:
IF,,,,,,,, The passengers side actuator is bad,,,, THATS A LOT OF WORK to access it and change it out.
Sounds like that's your issue. Get a light, remove the close out cover in the drivers foot well and take a look at the actuator and see if the operator moves when you change temps.
You can always easily remove the drivers side actuator and inspect it. Some people have repaired the damaged gear:
IF,,,,,,,, The passengers side actuator is bad,,,, THATS A LOT OF WORK to access it and change it out.
Thread Starter
Intermediate
Joined: Nov 2010
Posts: 48
Likes: 0
From: Madison AL
I have done the "remove fuse #27" thing a couple of times and it did not help.
It's acting like it keeps trying to calibrate the actuators - over and over again.
I thought about the broken actuator gear, but wouldn't that keep the actuator doors from moving? I keep hearing the doors creaking about every minute or so. If it was the gear, then wouldn't it just spin and not move the doors? My HVAC controller is also having an issue with the fan motor speed control. Could my controller be bad?
Sam
It's acting like it keeps trying to calibrate the actuators - over and over again.
I thought about the broken actuator gear, but wouldn't that keep the actuator doors from moving? I keep hearing the doors creaking about every minute or so. If it was the gear, then wouldn't it just spin and not move the doors? My HVAC controller is also having an issue with the fan motor speed control. Could my controller be bad?
Sam
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I have done the "remove fuse #27" thing a couple of times and it did not help.
It's acting like it keeps trying to calibrate the actuators - over and over again.
I thought about the broken actuator gear, but wouldn't that keep the actuator doors from moving? I keep hearing the doors creaking about every minute or so. If it was the gear, then wouldn't it just spin and not move the doors? My HVAC controller is also having an issue with the fan motor speed control. Could my controller be bad?
Sam
It's acting like it keeps trying to calibrate the actuators - over and over again.
I thought about the broken actuator gear, but wouldn't that keep the actuator doors from moving? I keep hearing the doors creaking about every minute or so. If it was the gear, then wouldn't it just spin and not move the doors? My HVAC controller is also having an issue with the fan motor speed control. Could my controller be bad?
Sam
Sam
LOL!! When the gear cracks it can make all sorts of weird noises. You need to physically see if the shaft is moving when the actuator is commanded to change the temp.
What type of HVAC do you have ??
Manual or Dual Zone?
If you have a manual system, the resistor board has blown resistors and looks like this:
If you have a dual zone, the control module ($$$$) is TOAST and probably looks like this inside:
MODULE APART:
BURNT CIRCUIT TRACES:
