heater

Asked by jonfountain Dec 08, 2016 at 08:45 PM about the 1994 Mercury Grand Marquis GS Sedan RWD

Question type: Maintenance & Repair

Heater dont blow hot but if i rev engine up it
gets hot ... What's the problem

1 Answer
101,595

KenF answered 7 years ago

Either you have low coolant, or a weak/failing water pump, or a restricted radiator or some other sort of blockage in the cooling system. It gets hotter as you rev the engine because you are forcing the engine to push more coolant through the cooling system. But under lower RPMs, there isn't enough coolant flow to the heater core due to above mentioned reasons.

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • Heater 1 Answer

    Sometimes my heater blows cold air. Other times it works fine and blows warm air. It is an intermittent problem.

    2006 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • heater 1 Answer

    Heater dont blow hot but if i rev engine up it gets hot ... What's the problem

    1994 Mercury Grand Marquis GS Sedan RWD

    -

    Maintenance & Repair

  • Air conditioning/ heater 2 Answers

    After a couple of days of a knocking noise around the on off switches. Which I was able to stop by turning the heater / air to off and presses all the buttons, I did not have cold air anymore. It j...

    2003 Mercury Grand Marquis LSE

    -

    Maintenance & Repair

  • why the heater wont get hot 5 Answers

    heater want get hot

    2004 Mercury Grand Marquis GS

    -

    Maintenance & Repair

  • block heater on grand marquis 1 Answer

    I need to replace the plug on my block heater but its -20 outside and i want to do it inside my home. i see that the cord is plugged in under the hood, I can disconnect that and take the end of the ...

    2002 Mercury Grand Marquis

    -

    Maintenance & Repair

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,700
  • #2
    Trippmeister
    Reputation
    5,060
  • #3
    Bob Beaman
    Reputation
    3,780
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Lincoln Town Car
2 listings starting at $9,995
Used Ford Crown Victoria
4 listings starting at $8,960
Used Chevrolet Impala
8 Great Deals out of 131 listings starting at $3,495
Used Ford F-150
315 Great Deals out of 13,484 listings starting at $4,888
Used Toyota Camry
50 Great Deals out of 1,122 listings starting at $2,500
Used Buick LeSabre
1 listing
Used Lincoln Continental
12 listings starting at $21,880
Used Honda Accord
50 Great Deals out of 947 listings starting at $2,995
Used Toyota Avalon
5 Great Deals out of 37 listings starting at $6,995
Used Chevrolet Corvette
23 Great Deals out of 767 listings starting at $18,999

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. Content will be removed if CarGurus becomes aware that it violates our policies.