1994 Ford Ranger Heater doesn't blow out hot air

Tiny
EXPRESSDJ
  • 1994 FORD RANGER

Heater problem
1994 Ford Ranger 6 cyl Two Wheel Drive Automatic 59999 miles

How can I diagnose reason for Heat not blowing out hot air? I Started out by changing thermostat.

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Saturday, December 6th, 2008 AT 10:19 AM

3 Replies

Tiny
RENAUDTN
  • MEMBER

To find out if your heater core is clogged, feel both heater hoses (the two hoses hooked on the heater core inlet and outlet at the firewall) with car idling at normal operating temp and heat set on high. Both hoses should feel very hot. If one is cold or luke warm, your heater core is probably clogged. Flush it or replace it.
If you have a heater control valve on your car, make sure it's not stuck close. If you have one, it's probably in one of the two hoses with a vacuum hose hooked to it.

Also make sure your level of coolant is good and make sure there's no air in your cooling system (bleed it).

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Saturday, December 6th, 2008 AT 1:58 PM
Tiny
EXPRESSDJ
  • MEMBER

Well I couldn't believe it in the least. I did the diagnostic as you said. One heater hose hot the other heater hose barelyt warm. So I just replaced the heater core.

30 minute job the heater is now like I always new it to be. Hot on all sides. Could probably flush the old heater core and use it again. The thing is copper the one I replaced it with is aluminum. But again no more than the cost guess I could just junk the old one.

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Saturday, December 6th, 2008 AT 4:53 PM
Tiny
RENAUDTN
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So your heater blows nice and warm now?

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Saturday, December 6th, 2008 AT 10:10 PM

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