Ford F-150 - 1997-2003 :: 2001 2WD - Heater And AC Not Working
Nov 25, 2012
I have a 2001 F150, 2WD, 5.4L. Neither the heat nor the air conditioning works. The blower works fine on all settings, and the air blows out of the correct ducts in accordance with the switch settings. The problem is the heat does not blow hot, and the AC does not blow cold. Everything is just the temperature of outside air.
If I jumper power to the compressor at the relay socket in the fuse box, I can make the compressor run and it provides cold air. The relay does not seem to be the issue because replacing the relay does not work. The heater core is hooked up, just no hot air.
I was thinking maybe the problem is in the temperature level switch in the dash panel. Does that sound like the best possibility? Do you think these problems are connected, or am I looking at two different issues.
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I have a 2003 f150. I had to bypass the heater core and now my A/C isn't working. The A/C compressor don't even come ON.
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I have a 2000 F-150 and my lights to my gauges and heater controls quit working. I checked all the fuses inside and under the hood. All good. I swapped a few relays around and no luck. I tried replacing the headlight switch and that did not work. I checked power to the gauges from the headlight switch and there is no power, I then ran a hot wire to the wire that powers the gauge lamps and they do light up, so it is not a bulb issue. I assume I am not getting power, but do not know where else to look?
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Over the last few days I have read several threads about heaters not working and blend door replacement. My '02 4.6 F-150 has 250k+ miles and I've always done regular maintenance on it. With the cold front moving in I've noticed that the heater is not blowing hot air. I flushed the radiator and flushed the heater core several times to make sure the core was not clogged. I also replaced the upper radiator hose because of the "crunchy" sound when squeezed. I also replaced the thermostat. Still, the heater is not blowing hot. I assume like many others that the blend door needs to be replaced. My question is do I need to replace the door only or the door and the motor (actuator)? I guess I need to test the motor before buying a new one. I saw a video where you remove all the components on the transmission hump and can actually stick you finger in the motor opening to see if the shaft has come apart.
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I have a 2001 F150 with a 4.6L.. Do I need discharge the AC lines when replacing the heater core? How difficult is it to replace the heater core?
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So the heater on my 2001 f150 will only blow through cold air. I thought that I may have a heater core clog so I back flushed it with water until it was coming through clean and unrestricted but that didn't solve the problem.
Now, some things to note are a potential coolant leak. I can't seem to find one but I filled up the antifreeze about two months ago and when I checked it the other day it was more or less empty. I've filled it up again and I will monitor it for the next couple of days.
Another thing to mention is that no matter what setting I have the heater on (ie 'panel' or 'defrost') I get cold air blowing at the passenger side's feet. Is this indicative of a hose leak or something?
Also worth noting is that the intake hose to the heater core gets hot after driving but the outtake stays cool. This is why I originally thought I had a core clog.
Should I be checking my blend door? If so how to I access it?
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My heater core must have sprung a leak this week. Not that I need heat in this weather but just the smell of it while running the A/C just stinks. I know I am going to have to replace it myself but just for S&G, what would a dealer charge to replace it?
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Today, while driving on the highway, my heater just quit working. My car is equipped with the automatic climate controls and so I switched it to manual mode to see if the heat would come back. The heat does not seem to be mixing at all with the air.
One weird thing is that if I set the temperature to 90 degrees then the A/C mode will turn off and blow pure hot air. However, if I go to 89 degrees then the heat will stop and the A/C will turn on again. Turning off the A/C manually does not bring the heat back.
What could be wrong? I might just try unplugging and reconnecting the controls since I was messing with the radio a couple of days ago.
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The AC on my 2001 F150 didn't work correctly so I bought a gauge and a bottle of AC juice and decided to charge the system. The AC starts out cold and turns warm. I put the gauge on the system and the needle goes to the red portion of the gauge. The AC will turn warm.
Is there a relay switch that quits functioning? Is there a code I could look at to determine the problem?
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2001 f150 extended cab flareside 4x4 4.6L v8, M5od manual, 196,539 miles this morning. the clutch slave is going out so I have some grinding and extra noise but recently the motor began to run like crap. I took it and coded it. "p0403, cylinder 4 misfire" is what it read on the obd scanner screen... I had a similar issue with the COPs not working and actually allowing water into the spark plug cylinder. I replaced them all at 100,000 miles or so with new motorcraft plugs at that time.
Fixed the problem and nothing since that time. Not sure why I did them all but I did. i was dumber 96000 miles ago. I also took down the intake and cleaned all the ports and crap out of it also. Yesterday took out #4 (on passenger firewall) and it looks fine. No evidence of leak, spark plug a light tan, firing well without problems, and even gaped properly still. My question is first I understood the p0403 to be EGR related, not cylinder #4 misfiring...seems odd.
2nd: I'd like to avoid just throwing parts at this problem. The EGR is simple enough to replace and if that's what is needed so be it. I'd rather do it right the first time. I've checked all of the vacuum lines, fittings, attachments. No leaks detected with smoke/brake fluid tests either. Good suction at the PCV, all good.
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2001 ford taurus. The heater worked (not great) then slowly got colder each week for 4wks changed the thermostat.
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My hubby is working on a 2000 F150. The heater does not get hot. He has checked the blend door and it is functioning correctly. Is there a valve on the back of the engine that shuts the water off going to the heater core?
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Last summer my A/C and blower stopped working while I was driving on a hot day in July. After replacing blower resistor, the fan works but still no A/C. I tried recharging refrigerant but the pressure in the lines was too high. Also it didn't seem A/C compressor was working either. I suffered through the hot summer only to find when winter came the Heat quit working as well. I noticed antifreeze smell in cabin and put liquid aluminum to stop the leak and still no heat. I planned on pulling the dash and replacing the heater core but wondered while the dash is off could there be something to replace in here on the A/C as well?
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My commute into the office was more difficult than usual because of the fumes pouring out of the vents. I have a 1997 F-150 5.4 V8. should I remove both in and out hoses from the firewall and connect them with a plastic fitting not to risk breaking the aluminum fittings on the motor?(There is an advanced a mile away) OR is it possible for me to remove the in hose from the firewall and remove the out hose from the motor, and run the in hose directly into the motor. Are the fittings the same and can I do that with limited time and tools?
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I took the dive into a new heater core, as the heater was not getting hot. These are the things I did while on my adventure.
1. Before reinstalling the hoses, I blew thru them to make sure of no clogs...water flew out the other hose..no problem..no clog.
2. inspected mix door not cracked or broken...no problem
3.actuator opens and closes ok, I assume, I can hear the motor run and the door thump closed...no problem
4. water and anti freeze level good....no problem
Start vehicle,let warm up, turn on heat.....No Heat...
5. check hoses at core, one is hot ,the other is not....Problem...
1997 f150 4x4 ...
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I have a 2000 f-150 4x4 that has only high fan speed for a/c heater. Speeds 1-2-3- no longer exist. Is it a switch or a control module? Also, the door code for the rear differential is 19; is that limited slip?
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I've replaced my heater core and blend door in my 2000 and getting ready to button things up. Can I hook up the heater hoses after the plenum top is screwed on to keep the core from moving when pushing on hose connections?
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My 00 f-150 is not blowing air through the heater I replaced heater core and the temp door I had same problem before work done I did not see an issue when apart but no vacuum or electric to test when apart. The only thing that changes when I move selector for vent floor and defrost I do get a little better flow when on vent. My feet get cold and defrost is not working well if I put hand on defrost I feel warm air but 3-4" away when on floor; I feel nothing anything at all fan seems fine.
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Got an 01 f150 excab with the 5.4 as of lately sometimes when i turn the 1-4 blower control know it wont do anything on heat or ac than other times it will work like it supposes to?
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1998 F150 step side, 4.6 V-8 automatic, 176,000 miles -
Heater begins to blow heat as the engine warms up - heat gauge moves up to normal level - running at speed, suddenly the heater blows all cold, the heat gauge pegs to total hot - the oil light comes on, the engine begins to miss - stop the truck, shut off the motor, wait 10 seconds, start back up and all is normal and away I go. Heater working just fine. Gauges are just fine. Have checked the hoses when it pegged to hot, and they are just warm just as if everything is normal.
Problem is intermittent.
Have changed radiator reservoir cap, thermostat, made sure fluid level and mixture is correct - what else to check? Computer issue?
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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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