Ford Super Duty (1999-2016) :: 2003 F250 - AC Blows Colder While Driving Than Idling


Jul 20, 2017

I have a 2003 f250 xlt with the 5.4l engine in it and lately my AC hasn't been standing up to the heat of the Midwest. When driving around town or on the highway my AC blows really cold but at idle you can tell a drop off in temp. Is this normal due to extreme heat or is there something I can do?

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Ford Super Duty (1999-2016) :: 2003 F250 - 10 Amp Fuse That Goes To Blower Relay Blows When Turn On AC / Heat

Recently got a 2003 f 250 6.0 that has had a little work done on it. Absolutely love it with 1 exception. When I turn on the ac or heat It blows a 10 amp fuse that goes to the blower relay. It was occasionally now it's all the time.Blower ok, fan speed resistor ok. What or where to look.

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Ford Super Duty (1999-2016) :: 2000 F250 - AC Just Blows Hot Air When Turned On

I just bought the truck and the ac was working and now out of nowhere when you turn it on it just blows hot air so I just assumed it was out of free on so I bought an ac pro but that did nothing.

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Ford Super Duty (1999-2016) :: F250 - Fuse 20 Blows When Trying To Start

The truck starter and radio would magically turn on and off after the first rain, it was hard on the starter and I had to replace the starter and the cause of that problem was the vacuum line coming from the brake booster running over the top of the wires in the 4 plugs attached to the driver side fender. It rubbed through exposing the wires and got wet connecting them. I cleaned them and put the electrical tape silicone and then it has been working fine for a couple months.

Now every time I try to start fuse #20 blows. So far I have traced the wire that goes through fuse 20 through the firewall being the blue wire with a orange stripe on it it goes through the top plug upper left most wire. From there I followed it through the 4 wheel fender plugs the furthest plug from the firewall still being the blue with orange stripe. If I unplug that plug and try to start the truck it won't start but the fuse does not blow.

I then followed that wire all the way to the neutral safety switch. I hate tracing wires. (About 8 hours so far). I am thinking neutral safety switch. Also another thing I am thinking is weird is that blue wire with the orange stripe is grounded when the safety switch is plugged into the transmission and if it is unplugged is is not grounded. And I don't think it is supposed to be grounded because that is the hot wire when the key is in the start position.

Details about the truck : 1999 f250 diesel 7.3 super duty automatic 4x4 dated 4/99

I have taken pictures of the plugs and wires I was going to post it but don't remember how.

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Ford Super Duty (1999-2016) :: 2011 F250 - AC Blows Hot Then Cold

I have a 2011 F250 with ac problems. When you start it in the morning and turn the ac on it only takes a small amount of time for the air to start cooling. If you turn the truck off then start it again after driving to town the ac blows hot air out up to 4 minutes (yes I timed it) before it starts cooling. I took it to a local repair shop and the first time they said it only had half the freon it needed. The charged it and off I went. Same problem. The second time they informed me the fan clutch was not engaging and replaced it. I picked it up and the first time it was turned off and back on it had the same problem. I am scheduled to take it back to the same repair shop on Monday.

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Ford Super Duty (1999-2016) :: 2003 F250 V10 - Brake Line Burst While Driving

Had the rear passeneger side brake line burst today in rush hour traffic ..wasn't much fun. Is it a easy to do it yourself deal ...it is a 2003 f250 v10 triton .

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Ford Super Duty (1999-2016) :: 2002 F250 - AC Blows Cold For About 15 Minutes Then Air Gets Really Warm

I am the proud owner of a 2002 F250 Super Duty 4x4, which has 158K miles on it. I live in South Florida and use the truck as my daily driver and also from trips up into the Blue Ridge Mountains.

Recently, I noticed that when I have the A/C on it blows nice and cold for about 15 minutes, but then the air gets really warm. I had the system checked and the Freon levels are right where they should be. A bit of experimenting reveals that if I turn off the A/C for about 10 or 15 minutes after it starts to blow warm air, the systems blows cool air as it is supposed to.

Therefore, I suspect that something is freezing under the hood and preventing the system from operating properly. Since A/C is pretty well essential for us in south Florida, this is a problem, when I have the family or customers in the truck.

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Ford Super Duty (1999-2016) :: 2010 F250 Diesel - Heater Blows Cold Air

The heater blows cold air from the driver side only. Very cold. Vey hot on passenger side.I have read that this is likely a blend door issue. Comments? Fluids are full. I hear slight noises from under the dash like "click click" like a door is trying to activate?? Truck out of warranty. If it is the door I heard the driver side is not as tough to install. Again comments? Instructions?

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Ford Super Duty (1999-2016) :: 2003 F250 - Door Ajar Light Stays On When Driving

I bought a crew from a dealer, all the dome lights and cargo lights had the bulbs removed, so i put them back in and of coarse they all stayed on after you close the door, plus the door ajar light stays on when you are driving. I do notice the radio shuts off when you open the door after you turn off the ignition. Does that work on the same door switch, eliminating those?

Also are there switches on the rear doors also? Noticed that the radio isn't effected when you open a rear door. I tried to get the dealer to look at it a day after i took it home, a ford dealer at that, and they told me they tried to figure it out , and couldn't before they sold me the truck. Doesn't say much for their service department.

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Ford Super Duty (1999-2016) :: 2003 F250 Squeak While Driving Through Town Sounded Like U-Joint

I have a 2003 F250 Ext Cab 158" wheel base, 5.4, auto. 2wd

Last week I noticed a squeak squeak squeak while driving through town, sounded like the u-joint. I got home, jacked it up and pulled the rear shaft. Unfortunately I, bone-headedly, did not mark it when I pulled it. I took it into town and had a shop put in two new U-joints from autozone.

I got home and, forgetting to mark it, put the driveshaft in 180 degrees out. This caused the whole assembly to get out of balance and tear up the carrier bearing.

I replaced everything, pulled the complete shaft and disassembled it to put the new carrier on it...again, for some reason I didn't mark it. I knew I was supposed to.

It destroyed the carrier bearing again. So I limped it to my mechanic the next morning. He went through and replaced the front u-joint and carrier and called it good. I picked it up that afternoon and it was vibrating again.

I took it back and they kept it overnight and fixed it again. The problem they had was the driveshaft was coming back on the 'flex' and rubbing into the carrier instead of sliding back and forth, it was sticking.

They got that all fixed up and the wife picked up the truck while I was at work Friday. I called her at lunch and she said it was still squeaking like before I took it to the shop. I get home that evening and drive it and, sure enough, it's squeaking like it has a bad u-joint.

But the squeak didn't start right away, I had to drive it about 5 miles for it to start, and then I didn't hear it until I slowed down enough to get rid of the wind noise.

I took it back to the mechanic this morning. He called me around 4 and said they drove it about 25 miles around town and on the highway and couldn't duplicate the noise.

He said they went ahead and hit the grease zirks on all 3 u joints(even the ones they didn't install on the rear shaft) and they couldn't hear any squeaks. So I pick it up, drive through town a bit and start heading home. No squeaks.

I get about 20 miles out of town and slow down going over a bridge with the windows down, and there is the squeak again. Still sounds like a bad u-joint. But I didn't hear it until I drove it about 25 or 30 miles. What this noise is or what I need to be looking for?

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Ford Super Duty (1999-2016) :: 2003 F250 - Fuel Started Leaking While Driving Cold

This morning while driving cold a fuel leak started on my truck it's a very heavy leak wondering what are the most common leaks on an 2003 F250 6.0L are so I can start there.

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Ford Super Duty (1999-2016) :: 2006 F250 - Crank And Blows White Smoke For 1 - 2 Minutes?

I just recently purchased my 06 Ford F-250 it's got the 6.0 in it once I made a 6hr trip I've noticed once you warm it up and ride a little bit kill it let set for 30min or better and crank it up it blows white smoke for a min or two than on the way to work this morning my heater.

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Ford Super Duty (1999-2016) :: 2006 F250 - While Shifting Into 4x4 A/C Heat Blows From Defrost Vents?

2006 F250 with the dash controlled 4x4. I typically keep the front hubs locked on this truck. I have recently noticed that when shifting into 4x4 that the a/c or heat will switch from blowing out of the vents to blowing out of the defrosters. Any clues how to fix this?

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Ford Super Duty (1999-2016) :: 2001 F250 - Stalling When Idling Down On A Cold Start

I changed the IAC valve 2 months ago because my truck kept stalling when idling down on a cold start and that fixed the problem. A few days days ago when starting it started revving to 2 - 3 K and won't IDLE down now? I changed the IAC again and that didn't work. What else should I be looking at to stop it from revving so high?

2001 F250 5.4 111,000 miles super duty.

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Ford Super Duty (1999-2016) :: 2002 F250 - IAC Changed - Truck Idling Too High

I just changed out my IAC. Truck is still idling too high. When I squeeze the host to the IAC it idles down. When I unplug the IAC the truck immediately dies.

Does the IAC talk to the the Throttle position sensor? Should this be my next part to change?

2002 F250 5.4L ....

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Ford Super Duty (1999-2016) :: Truck Shaking When Accelerating / Idling And Driving At 1500 RPMs

I got a 2000 f250, 5.4l, I got a check engine light bout 2 weeks ago and didn't experience any driving issues. The code was p0171, just recently I've been experience troubles idling, if I let my truck idle for about 3 minutes it will want to shut off, also on acceleration the hole truck bumps, feels like I'm in an earthquake. Where I should start with this problem?

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Ford Super Duty (1999-2016) :: Glow Plug Light Will Flash And Stay Off While Idling Or Driving

Okay, I just bought the truck (all stock except for straight pipe and cai). Nothing bullet proofed yet. It has 125,xxx miles on it and for the 4 months I had it I had no issue. Well now while idling or driving the glow plug light will flash on then off and stay off. I'll have no power and after a few minute it'll die on me. But start right back up. Is this a harness issue? 2006 6.0.....

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Ford Super Duty (1999-2016) :: 2003 F250 - Truck Pulls To Right When Driving And Pulls To Left On Braking

My 2003 F250 6.0 pulls to the right when driving at any speed. In order to keep it going straight the steering wheel must be slightly tilted to the left, not much but a little. When the brakes are applied hard it will go to the left slightly if you are not holding the wheel good. Neither of these are terrible, just a nuisance. I'm worried about uneven tire wear too. One front wheel bearing was replaced a few weeks ago. It had this problem before that and still does after. Does this sound like an alignment or maybe something more?

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Ford Super Duty (1999-2016) :: F250 4x4 460 Dies While Driving / No Warning

My 1997 F250, 4x4, 460, auto has started dying with no warning while driving from 5 to 30 miles. Changed the fuel filter and the fuse under the hood. Where to start.

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Ford Super Duty (1999-2016) :: F250 - RPMs Surge When Let Off The Gas While Driving

I've got a 99 f250 5.4 that runs like a top. In the last 6 months I've been chasing a little problem. It doesn't happen all the time but seem to be happen more and more. While driving any speed If I let off the gas the RPM's hold at around 1500 then surges down to 1000 then back up again to 1500.

Does that 2 to 4 times then all good. Give it gas again it does it again. It kind of does it when it wants. Could be fine for a trip around then next trip it acts up again. Checked a lot of the vacuum lines, PVC valve and replaced the idle control next to the EGR valve. EGR is next.

Idles and runs fine except the surge thing..

P0401 code as well.

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Ford Super Duty (1999-2016) :: F250 Cutting Off When Driving Down The Road?

While driving down the road the truck will just cut off. We wait a few mins and start it again can drive a few miles and it cuts off again. we have replaced the ignition coils and it is still doing this. No codes are coming up to get any idea what it can be?

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