Air Conditioning

JULIEFLY

MEMBER
2000 CADILLAC DEVILLE

Air Conditioning blowing hot & cold at same time! Both sets of our parents are having the same problem with thier cars, a Cadillac Deville and a Buick La Sabre. 2000 and 1998 respectivly.
We live in the desert where it gets really hot so undrivable in the summer. Driver side blowing hot and passenger side blowing cold on the Cadillac and the reverse on the Buick. They are all in thier 80's so any help or reccomendations is appreciated!

3 Replies

FACTORYJACK

MECHANIC
4,159 POSTS

It is quite possibly a problem with HVAC actuators, or doors. Usually it is a fault with an actuator. What happens, is that when one is read as being overtraveled, it defaults to a position, usually max hot or max cold. Often times there are codes set, but they are in the HVAC module, and a generic code reader will not access them.

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Thursday, February 10th, 2011 AT 4:44 AM

TJRUBES

MEMBER
1 POST

I am also having the same problem the weird thing about it was I had the refrigerant drained and had new put in, the A/C worked for about 2 or 3 weeks then went back to hot on drivers side and cooler on the passenger side I haven't found a solutions to this problem but would be amazing if I can get it fix.

Was this

answer

helpful?

Yes

No

+1

Monday, February 14th, 2011 AT 11:04 PM

FACTORYJACK

MECHANIC
4,159 POSTS

More than likely you have a faulty actuator in the HVAC system, since it is dual zone, you could have that type of symptom. Ideally, you would need to scan the heating system for possible codes, and to read data. When an actuator fails, it is usually interpreted as an overtravel, and the system then defaults to one extreme or the other. The default action is often system specific.

Was this

answer

helpful?

Yes

No

+1

Thursday, February 17th, 2011 AT 3:21 AM