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

Asked by 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

79,385

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 of 3 people found this helpful.
Best Answer Mark helpful

Your Answer

Ford Ranger Experts

  • #1
    tennisshoes
    Reputation
    1,400
  • #2
    F_O_R
    Reputation
    890
  • #3
    Tracy Hooks
    Reputation
    850
View All

Related Models For Sale

Used Ford F-150
2,485 Great Deals out of 193,506 listings starting at $799
Used Chevrolet S-10
15 Great Deals out of 1,262 listings starting at $1,600
Used Dodge Dakota
101 Great Deals out of 3,677 listings starting at $1,700
Used Jeep Wrangler
322 Great Deals out of 17,050 listings starting at $2,999
Used Ford Mustang
586 Great Deals out of 36,169 listings starting at $1,800
Used GMC Sierra 1500
986 Great Deals out of 66,544 listings starting at $2,495

Used Cars For Sale

2011 Ford Ranger For Sale
31 Great Deals out of 785 listings starting at $3,950
2010 Ford Ranger For Sale
22 Great Deals out of 496 listings starting at $4,495
2009 Ford Ranger For Sale
14 Great Deals out of 332 listings starting at $3,850
2008 Ford Ranger For Sale
21 Great Deals out of 402 listings starting at $2,995
2007 Ford Ranger For Sale
14 Great Deals out of 297 listings starting at $1,900

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.