Question about 1999 Ford F150 Regular Cab

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No heat from my 1999 f150 heater hose hot on one side other is cold

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Is sounds like the heater core is clogged up. you can remove the heater hoses, not from the heater core ( the core fittings can be delicate) but from the other ends on the engine and flush it backwards( colder hose) to blow the gunk out, use low pressure air or low pressure water.
There is a potential downside to this, the gunk may be plugging up a leak. take out the gunk and you might have a leak. Also if you over pressurize you may spring a leak. But on the otherhand if you were going to replace the heater core any ways you got nothing to lose. By the way if you do damage the heater core just loop one of the hoses back to the engine fitting. this will keep you on the road until a proper repair can be made. watch out for gunk spraying out of the hose or wear a raincoat and goggles!

Posted on Oct 14, 2010


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