Ford A/C :: 1998 F150 - Heater Fan Not Blowing


Mar 29, 2013

I have a 1998 F-150 and when I turn on the heater there is no force in the air coming out of the vents.

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Ford A/C :: 1998 F150 - Cold Air Blowing Only For About 10 Minutes Then Hot

AC blows cold for about 10 minutes and then blows hot?

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Ford F-150 - 1997-2003 :: 1998 - Heater Hose Blowing Off

98 F150 2wd 5.4 -even though VIN says its "W" 4.6; it has a 5.4 with 4.6 timing setup-found. But that's a whole other story...

So, Replaced heater core. did the blend door too.

A week later it overheated and blew a heater hose off the core at the firewall (several times). Temp was up and down, forced me into cylinder head protect mode, so i called my mechanic.

Mechanic used a sniffer (blue liquid turns yellow) in my overflow tank and there was exhaust gas in it... so we replaced head gaskets, intake, timing, water pump, radiator and the rotted out rad support.

Got it done and back on the road, but a few weeks later and the heater hose quick disconnect blew off again, spewing coolant all over (again). This was what we thought was part of the original problem- head gasket allowing cylinder compression into the coolant passages. the little rubber hose that comes from the back of the intake and goes up into the heater core builds enough pressure to pop the disconnect right off and I dont know why. Like I said- I thought it was the head gasket blowing pressure into it but that's all been replaced. Why the pressure would be so high at that point, and how do I correct this?

This is my daily driver, so for now I've bypassed the heater core, but I'm afraid that pressure is gonna burst a hose and/or fitting again.

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Ford A/C :: 2000 F150 - Heater Core Went Out

I have a 2000 F-150 5.4L 4x4. I am currently deployed and my wife has the truck. Just yesterday she told me my heater core went out again the only way she knows this is its the 4th time in just over a year. What would cause a heater core to go out so many times in a short period? What should I have my wife do? I do not want to get rid of my truck and I wont be back for another few months.

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Ford - F150 :: 2003 - Run Hot / Blows Cold When Heater Is On?

A friend has a 2003 F150 that after starting up will run hot but blow cold air when the heater is on. The truck will run hot for ~ 5seconds then all of a sudden the temp drops to normal range and the heater begins to blow hot. Simultaneously, the oil pressure light comes on when the truck runs hot, then falls to the normal range when the temp drops. I thought perhaps the thermostat is in backward.

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Ford A/C :: 1997 F150 - Heater Only Blows Warm Air?

I have a 1997 ford f 150 lariat with the 4.6 v8 and my engine had a piston slap so I replaced the engine with a used one and I put a new water pump on the engine. My problem is the heater does not get hot and it only gets warm when I get on the freeway and the rpms stay steady for a bit. but when i idle it just blows cool air. the heat door works cause I can turn it to cold air when I'm on the freeway and i just replaced the thermostat so I don't believe its that. It weird because the heater worked fine before I changed out the engine so i cant figure it out. the only thing i can think of is the water pump is bad out of the box. Could it be the belt or does spacing on the water pump have something to do with it. nothing is leaking.

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Ford - F150 :: 2001 - Reversing Flow To Heater Core

The heater on my 2001 ford F150 is not heating. The blower is working, the inlet hose is hot, the outlet hose is cold. Removal of hoses confirms that there is very limited flow through the heater core. I flushed it but got only minimal improvement. However when I back flush (reversing the flow through the core) the flow is great. Here's the question: Can I reverse the flow through the heater core on a permanent basis? It seems this would give the needed flow of hot fluid through the core to allow heating. Is there a problem with doing this?

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Ford - F150 :: 2002 - Replaced 4 Heater Core In A Year?

Ford dealership is having problems with heater core repair. 2002 Ford F150 Supercrew. Problem is antifreeze (or early on just smell) in the cabin. 4 heater core replacements in 2 years. A hose (?) replaced. Electrolysis kit replaced. 4th heater core replacment finished yesterday. I know that I need to let the dripped antifreeze work out of the system, but I am smelling mild antifreeze this AM. Usually gets worse over 2-3 days then I have to take it in. What might be being missed here?

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Ford A/C :: 1999 F150 - Heater Not Working / Air Blows Cold

I have a '99 F150 4.2 5 speed, my problem is, my heating isn't working. My A/C works fine, my blower motor does too, i changed my heater core about a year ago. I turn my truck on wait for it to warm up and once my gauge reads normal temp, i turn my control to the warm position but the air blows cold with just a very small hint of heat. I looked it up in my Chilton book and they said to check my hoses that go to the firewall/heater core. They say that both hoses should be hot and if one isn't to check it. i did that and the one on the left side(facing the truck) is barely warm. what could be my problem? heater core? my friend from Autozone said something about a vacuum control somewhere in the engine compartment but i don't know where it is, could that be a problem? Or would the flapper door be stuck?

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Ford A/C :: 2001 F150 Will Not Turn Over After Heater Core Replaced

I replaced the heater core in my truck. Now it will not turn over. When the key is turned on all the lights in dash come on like normal but when I turn the key to start it I get nothing.

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Ford - Suspension - F150 :: Fuse For The Speedometer Keeps Blowing

The fuse for the speedometer keeps blowing. I changed the fuse and the circit breaker in Dec. 6 weeks later the fuse blew again, I replaced it and it last another 2 weeks and blew again. What is causing and what might be the solution?

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Ford A/C :: 1994 F150 - Compressor Spinning But Hot Air Blowing

The Truck: 94 F-150 XLT 5-speed 300-I6

The Problem: AC blowing hot air.

What I've done: Start the truck, look at the compressor, (looks like it's spinning to me), engage the AC, look again (yep the pully on the compressor is still spinning).

And that's pretty much where i stopped, cause i don't know what i'm looking for, should i be seeing it not spin if it where seized, and whats next on the list to check.

I assume that it's not seized at this point and it must be something else, like a control, keeping it from working.

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Ford A/C :: 2006 F150 - Warm Air Blowing While Idling?

Having problems with the A/C on F150 2006 or newer. It blows warm air while idling. I have taken mine to 2 different dealerships had Ford engineers down and no one can seem to find the problem. I love Ford vehicles but I can't handle this in the these hot summers.

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Ford A/C :: 2012 F150 - Air Blowing Out Of Front Vents Intermittently

My 2012 f150 AC is blowing out of the defrost for a couple of minutes on start up. The AC will begin to blow out of the dash vents then will switch back to the defrost vents before blowing out of the dash vents for the remainder of the trip.

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Ford A/C :: 1997 F150 V6 - Cold Blowing Only Through Defrost Vents?

My A/C is blowing cold but only thru the defrost vents. First it was blowing normally from the dash but during acceleration or under load, the a/c would randomly blow from any vent, from the floor, dash, defrost. Now that stopped and it only blows from the defrost vents above the dash-board.

1997 F-150 XLT, 4.2 Liter, V6, manual transmission.

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Ford A/C :: Heater Blowing Cold Air

Heater is blowing cold air. What I have checked, coolant level, replaced water pump and thermostat, checked blend door, flushed heater core. When I checked the blend door via the heater treator method I was getting hot air coming off the core but also getting very cold air coming from the A/C evap in side the plenom box. I also pulled the fuse for the A/C clutch and I am still getting cold air. I am look at replacing the HVAC contol.

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Ford - F150 :: 1998 - Smell Of Antifreeze In Cab

I have noticed a smell of antifreeze in the cab of my 1998 Ford F-150 truck. 8 cylinder 4.6 litre triton engine. Some friends say the heater core has a leak. The windshield fogs up when running the defroster. How difficult is it to replace the heater core?

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Ford - F150 :: 1998 - Overheating Even At Start Up?

256,000 miles. Started overheating as soon as the truck started up. Replaced the radiator and thermostat, and now overheats when driven over 40mph. (Does not overheat in idle or under 40). Everyone I've talked to says I've got a blown head gasket, but i DO NOT have water in my oil or white smoke coming out of the tailpipe.

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Ford - F150 :: 1998 Truck Won't Start After Getting Warm

After truck gets warm it won't restart.

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Ford - F150 :: 1998 - 3rd Gear Gone In Automatic Transmission

1998 Ford f150 172984 miles automatic with 4x4 runs and drives transmission is going out will not hit 3rd gear have to drive in 2nd. Is there a fix without pulling the transmission?

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Ford Transmission :: 1998 F150 4.6 4x4 Won't Shift Into 3rd Or Overdrive

I have a 1998 F150 with auto lock 4x4 and a automatic transmission. The problem I am having is after setting for about a week I drove it and 1st to second shift normally but when the RMP's/MPH hits time ti shift to third I get RMP increase and no third. I have shifted it manually 1 then 2 and into drive same result RMP's increase just like it is in neutral.

Miles on trans is about 120K have been serviced about 10K ago with no poor color or smell. Mechanic said transmission and filter looked good no metal or junk in oil. I drive down the road and it shifts from first into second then about 35-40 it hits what should be third but nothing free RPM's. I let it slow down to below 35-30 second kicks back in and away we go again until it's ready to shift into third.

I have been told possible speed sensor problem, possible other sensor problems looking for leads on where to look and what items to check. Just had Shop Mechanic drive it and he was baffled for everything looks good that he checked such as oil, and how it drove until it tries to shift into third. No over drive light flashing or anything and no engine codes showing at all everything clean in memory.

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