89 Ford Straight 6...Heater problems
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New User
Joined: Jun 2008
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From: Indiana
89 Ford Straight 6...Heater problems
I have an 89 1/2 ton 4x4 with a straight 6. I bought it this summer. It has AC...and i switched it over to R134. Charging system works fine, but it didnt blow cold air out, just hot ambient air being blown over the engine. Now that its winter and down in the teens here in Indiana. It blows luke warm air out the dash vents and floor vent. The defrost setting blows cold air...if I have it on floor/defog setting it will blow luke warm on the floor and cold out the windshield vents. All the vaccum motors are working fine.
Any ideas?
Thanks
Any ideas?
Thanks
Thread Starter
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New User
Joined: Jun 2008
Posts: 14
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From: Indiana
Exactly...mine doesn't even get to the "N" on normal!
Senior User
Joined: Nov 2007
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From: THEHAUTE
mine either AND my rad is half blocked off...thermo is wrkn idk..wat part of IN im in Terre Haute
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From: Indiana
PS...Thermostat is new.
Thanks for the replys
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Thread Starter
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New User
Joined: Jun 2008
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From: Indiana
Actually Jasonville, I work in Terre Haute and my wife is from TH South.
Post Fiend
Joined: May 2004
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From: Lakewood, Ohio
do you have anti freeze in the truck? the proper amount?
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New User
Joined: Jun 2008
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From: Indiana
My garden hose is froze...not my trucks hose's. I'm a little more with it than that. BTW, the antifreeze and radiator are fine.
Senior User
Joined: Nov 2007
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From: THEHAUTE
garden hose is the one that was frozen i think....
and is there a way to test how much antifreeze i have in my truck? i know it has to have that bc it hasnt froze up
ohh and i go to TH South ready to get outa there hah
and is there a way to test how much antifreeze i have in my truck? i know it has to have that bc it hasnt froze up
ohh and i go to TH South ready to get outa there hah
Elder User
Joined: Nov 2005
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I'm running the big 6 in Evansville Indiana. Couple years ago, I had same problem and flushing the core didn't help. I replaced it for less than $25 and less than 30 minutes. While replacing it, I discovered a 3 inch deck screw stuck in the blend door. The screw kept the door from going completely shut. Doesn't take a lot of open blend door plus a really old heater core to keep things chilly. Everything was fine until a couple of weeks ago. The gauge started showing not coming up to temp, but the heater hose both felt hot. Replaced the thermostat again, and just for fun stuck a new sending unit in the block. Now the needle gets up to the M, and once the truck is all the way up to temp, it will run me out. If you change the thermostat, check it in a pan of water on the stove. Use a candy thermometer to see when it opens. The new one opens at about 200 and is rated at 195.
Good Luck Frank
Good Luck Frank