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1993 F-150 heater problems

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Old 08-11-2011, 05:04 PM   #1
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Default 1993 F-150 heater problems

Now that I fixed the A/C issue (rusted hole in the vacuum canister where that white vac lines goes to......), I have a heater issue now...It will not get warm at all....just blows cold air.....I'm thinking #1 low coolant.....#2 clogged heater core......#3 bad heater control valve (if my truck is even equipped with that). JUST CALL ME SEAN where are ya on this one bud!!!! Thank you!
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Old 08-11-2011, 06:48 PM   #2
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#1 - possibly
#2 - possibly
#3 - nope, no control valve that I'm aware of
#4 - temperature blending door/damper not working
#5 - heater hoses hooked up?
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Old 08-11-2011, 09:10 PM   #3
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Cable probably came off of the temp door or controls.
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Old 08-12-2011, 10:26 AM   #4
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now this morning after driving the truck for about 20 minutes, I put the vent on full heat and it blew warmish air but that was all she wrote???? anything here?
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Old 08-12-2011, 10:40 AM   #5
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If the max ac works would the damper door be working properly???? The little vacuum casister was just replaced and the max a/c doesnt switch to defrost anymore!
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Old 08-12-2011, 11:28 AM   #6
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It's cable not vacuum.
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Old 08-15-2011, 02:51 PM   #7
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Fixed it!! Looks like it was a completely clogged heater core....I have no idea how that happened but it was completely cloggled....Compressed air, water pressure wouldnt do sh*t. I just replaced it with new hoses as well. Then I filled with 2 gallons of 50/50 coolant and the rest water since I live in Florida I dont think that would be a problem. The truck should actually run cooler with the more water it has.
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