no heat in winter and over heats while driving slow in summer

Asked by spm1964 Nov 21, 2016 at 07:47 PM about the 1991 Ford Ranger

Question type: Maintenance & Repair

in the winter time truck only blows relatively cold air.  if I drive it for 10 mins will start to kick out enough heat to defrost windshield, but not enough to warm truck.  in summer  time truck will overheat if driving slow or in town.  temperature gauge goes go up and down all year long.  it never did this is past, always remained steady

1 Answer

I would replace the thermostat and hoses and flush the radiator and install new coolant. You also need to purge the air out of the system by parking the truck facing up hill and letting it idle with the radiator cap off and the heater on. Top off the coolant after it fully warms up. Don't take the cap off if the engine is hot! Also check the fan belt and cooling fan.

3 people found this helpful.
Best Answer Mark helpful

Your Answer:

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    4,420
  • #2
    Bob Beaman
    Reputation
    3,010
  • #3
    Jennifer Gorham
    Reputation
    2,620
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
299 Great Deals out of 15,725 listings starting at $1,712
Used GMC Sierra 1500
128 Great Deals out of 6,854 listings starting at $3,975
Used Ford Bronco
13 Great Deals out of 1,422 listings starting at $31,499
Used Jeep Wrangler
131 Great Deals out of 5,143 listings starting at $6,995
Used Toyota 4Runner
13 Great Deals out of 337 listings starting at $9,900
Used Ford Explorer
81 Great Deals out of 2,024 listings starting at $2,999
Used Ford Mustang
49 Great Deals out of 1,268 listings starting at $4,995

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.