heater sensor inaccurate

Asked by Dec 11, 2014 at 03:02 PM about the 2002 Mercury Grand Marquis LSE

Question type: Maintenance & Repair

temp gauge on dash is misreading and will only put out decent hear starting at 80
degrees.  Any suggestions?  I checked the fuses with no change in function.

3 Answers

14,030

If you are sure it is the gauge, it could be the temp sending unit. They usually have one wire in them and are screwed into the block. Their main purpose is to tell the gauge what to say.

1 people found this helpful.

ok - so how do I access the block?

14,030

I am referring to the engine block. You will have to Google the location of the sending unit for your year make and model. Understand that there is also a coolant temp sensor that is designed to tell your cooling fans to come on. Be sure to Google the one for the temp gauge. It will be the one with only one wire. The fan one has 2. Sometimes when I have trouble locating a part I go to my local auto parts store and ask them. Lots of times they will be able to tell you the location for your car. When you Google, make sure to include your engine size too. Good luck.

Your Answer:

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,270 nationwide Grand Marquis listings starting at $1,196.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    6,070
  • #2
    kbro
    Reputation
    2,240
  • #3
    Js08016
    Reputation
    2,160
View All

Related Models For Sale

Used Lincoln Town Car
25 Great Deals out of 1,442 listings starting at $899
Used Ford Crown Victoria
5 Great Deals out of 746 listings starting at $1,600
Used Chevrolet Impala
513 Great Deals out of 25,945 listings starting at $995
Used Mercury Marauder
25 listings
Used Ford F-150
2,283 Great Deals out of 198,756 listings starting at $1,300
Used Ford Mustang
310 Great Deals out of 39,695 listings starting at $1,312
Used Ford Taurus
203 Great Deals out of 16,068 listings starting at $600
Used Chevrolet Silverado 1500
1,780 Great Deals out of 154,899 listings starting at $1,700
Used Cadillac DeVille
1,272 listings starting at $999
Used Toyota Camry
858 Great Deals out of 70,625 listings starting at $1,300
Used Chevrolet Tahoe
633 Great Deals out of 37,962 listings starting at $1,199
Used Honda Accord
682 Great Deals out of 101,646 listings starting at $999

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
3 Great Deals out of 22 listings starting at $5,888
2010 Mercury Grand Marquis For Sale
76 listings starting at $3,995
2009 Mercury Grand Marquis For Sale
3 Great Deals out of 62 listings starting at $1,400
2008 Mercury Grand Marquis For Sale
4 Great Deals out of 96 listings starting at $2,495
2007 Mercury Grand Marquis For Sale
4 Great Deals out of 89 listings starting at $1,196

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.