Mercury grand marquis 1997 temperature control actuator how costly and should it be done asap
I'm not sure if yours is identical to mine since yours is second gen and mine is third gen, but with mine (1998 MGM), the heat was stuck on all the time. Full heat would practically cook your feet and you couldn't shut it off.
It was a servo/servo arm that controls the hot/cold mix door. The part was $15. The labor was $700. They had to take the entire dash out of the car to get at the part. Required two more visits due to a missed electrical connection to a daylight sensor and a vacuum issue that made the car stall when put into reverse.
My car had 150K on it at the time. Has 165K on it now. Still runs great and looks great. It's now my wife's auto and I drive a 2006 MGM.
I later had an issue with the 2006 MGM where the seals in the HVAC head unit dried out and made it not switch from anything but defrost. After spending $600 on a new one and getting it installed (another $700 mechanic bill), I found info online regarding the seals. Then I had the issue again in a 3rd MGM 2007 that I had and decided the worst I could do was break the head unit. So, I tore it apart, ordered the suggested silicone type o-rings (for $5 for a bag of 50), took pictures and took my time taking each actuator apart in the head unit and replaced the o-rings, then lubed them with some silicone safe lube and it worked like a charm.
I had kept the head unit from the previous replacement as I asked the mechanic for it just so I could look at it. I took it apart as well and replaced the seals just for a backup. They all had flat spots and were dry rotted too.
×
Pin Number
Circuit
Circuit Function
1
-
Not Used
2
-
Not Used
3
351 (BR/W)
Control Potentiometer Wiper
4
243 (LG/O)
Control Potentiometer Ground
5
-
Not Used
6
470 (PK/BK)
Control Potentiometer B+
7
247 (W/Y)
Actuator B+
8
246 (P)
Actuator Ground
524 views
Usually answered in minutes!
×