1999 Ford Ranger temperature

NO1MEATMAN

MEMBER
1999 FORD RANGER
4 CYL
2WD
MANUAL
210,000 MILES

When I start up the truck it will get to normal temperature then if I turn on the heat it will decrease the temperature all the way to the 'c' on the dial and the air comes out no warmer then 70 degrees. Turn off the heat and it warms back up to running temperature.

3 Replies

M8TRIX01

MEMBER
36 POSTS

You probably have a stuck thermostat. When the truck is cold remove the radiator cap and then start the truck you will be checking to see if the coolant is circulating right off the bat. If you see the coolant mooving or circulating your stat is stuck open.

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Sunday, February 17th, 2008 AT 12:06 PM

NO1MEATMAN

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2 POSTS

I looked at this and the coolent is not moving.

Thanks anyway. Anybody else want to try?

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Monday, February 18th, 2008 AT 7:08 AM

M8TRIX01

MEMBER
36 POSTS

With the truck off grab the cooling fan and try to turn it it should be just a little stiff but turn. If it doesn't then you have a bad fan clutch. The combined air flow plus the cold temp out side could be to much.

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Monday, February 18th, 2008 AT 3:56 PM