Where is the ambient temperature sensor located in the 1990-91 Grand Marquis with automatic temperature control?


Asked by May 27, 2017 at 12:24 PM about the 1991 Mercury Grand Marquis LS Sedan RWD

Question type: Maintenance & Repair

my 1991 Grand Marquis has problems with temperature control in my
automatic temperature controlled heating a/c system.  Where will I find the
ambient temperature control sensor ...cabin? ...underdash?...near heater/vent
controls?  under hood ( prob not? )...I think a 1990 would be the same.....

5 Answers


Just behind the grille, in front of the air conditioning condenser. HTH. -Jim

1 people found this helpful.
Best Answer Mark helpful

Thanks so much,... so this senses the outside temperature... do you know if there is also a sensor...a thermometer inside the cabin?..it would send the temperature to the automatic system , to shut things down when desired level is reached in the cabin.

1 people found this helpful.

You're welcome. Glad to help. Thank you for the best answer click! Yes, there's an in car temperature sensor. It's in the dash. My, '08 model has that sensor behind a little grille on the dash just to the left of the climate control panel. HTH. -Jim


Thanks again. I don't think it is in the same place on the 1991..will keep looking...Air is working now,, but thought I might find it while I had dash open.

1 people found this helpful.

You're welcome. Glad to help. -Jim

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