climate controll question
Thread Starter
Le Mans Master
Joined: Aug 2008
Posts: 6,531
Likes: 152
climate controll question
I have searched and done some reading. My heater only works on the passenger side. The drivers side blows cold.
However, My AC works on both sides.
So this leads me to believe my issue is the HVAC controll unit since if it were a vacum line problem the AC wouldnt work right either?
my car is a 98 and from what I am reading this is a fairly common problem. Should I order the unit for a later model? like a 2000?
Thanks in advance
However, My AC works on both sides.
So this leads me to believe my issue is the HVAC controll unit since if it were a vacum line problem the AC wouldnt work right either?
my car is a 98 and from what I am reading this is a fairly common problem. Should I order the unit for a later model? like a 2000?
Thanks in advance
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
There are actuators which might be the issue along with the vacuum line that feeds everything from the engine. I would suggest you start by pulling the codes and see what is reporting first. Then take a good look at the vacuum line in the engine compartment coming from the rear of the intake manifold near the MAP sensor, down the left behind the battery and into the firewall, looking for a crack or dissolved from battery acid issues.
Instructor
Joined: Oct 2010
Posts: 240
Likes: 2
From: Yangpyeong Gyeonggi-Do
Would agree. The drivers actuator door is probably in the right position for A/C cold air but not moving to the position to deliver the heated air. I would suspect a broken gear in the drivers side actuator. Would also think you should be throwing an actuator code. Do the modes change the vents properly? If so it is not a vacuum leak. Check your codes...
Last edited by seoulbrooks; Nov 25, 2010 at 03:53 PM.
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
Vacuum controls DAMPER doors which changes the vents that the air exits not TEMPATURE. You have an ACTUATOR problem. Read and post your codes. That will prove it if its completly dead. If the gear is busted, it may or may not throw a DTC.
Like previously stated, its most likely a broken drive gear as can be seen in this picture. Common issue:
You can get a mirror and examine the actuator and see if it moving when the temp is adjusted. Just examine the center hub of the actuator:
DRIVERS SIDE
PASSENGERS SIDE
Like previously stated, its most likely a broken drive gear as can be seen in this picture. Common issue:
You can get a mirror and examine the actuator and see if it moving when the temp is adjusted. Just examine the center hub of the actuator:
DRIVERS SIDE
PASSENGERS SIDE
