Cadillac Seville SLS Problems

Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Cadillac Seville SLS

Problem Description and Possible Solution

One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.

(74 people reported this problem)

Cadillac Seville SLS Vehicles With This Problem

RepairPal Verified
Average mileage: 116,112 (37,000–234,778)
11 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002, 2003, 2004
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Viewing 1-20 of 31 comments
Right side cool, left side hot on AC. Actuator door not working. If this so common why isn't it a recall?
Hot air blowing out from vents..all 4 front. Took to a mechanic he charged system. Still blowing hot. Said there was a leak in line behind dash. Got it back. 2 passenger vents cold, drivers side still hot. They said they can't figure out what's wrong. Taking it to Cadillac. I'm sure it's the Actuators as most state.
not fixed yet...blows hot air driver side, now, no air at all from ac dash vents. Recharged, blew cold for 1 hour, then back to the same. Time to take to a reputable shop.
Happens mostly with windshield defroster. Seems no air (hot and cold alike) will blow out of the dash vents. Also seems like it happens to the bottom floor heater vents.
Still waiting for AC sub contractor to fix problem. The left front vents are blowing cold air when temperature control turned to heat mode. The right side is blowing blows hot , both sides blow cold air when Air Conditioner is turned on.
Right side blows heat all the time, even with AC on. Left side blows cool almost all the time but will eventually heat up. Not fixed