Ford F-150 (2004-2008) :: Heater / Air Conditioning Fan Only Works On Full Blast (level 4)
Jul 21, 2012
Recently my truck is only blowing heat or air conditioning on full blast in my 2004 Ford F-150 (New style, not heritage).
Level 1, 2, or 3 is exactly the same and blows almost nothing, then if I switch it to 4 it is full power.
I just don't know what exactly I will need to change. I know it would be a resistor pack somewhere that probably failed, I just don't know where it would be.
Do I just need a new control switch, or do I need a new heater fan?
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My heater and a/c on my car have been acting up!
Yesterday I got into my car I turned on my heater and it didn't work! So I pushed the a/c button and that did nothing either! No air came out of the vents at all even on full blast... So I tried turning it off and back on and nothing happen then it finally worked but when i tried to turn it off it wouldn't turn off then randomly turned off by its self!!!
Whats going on and what I should check for this problem ?
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The heater fan in the van will only work on full blast and the rear wiper/ ac button lights flash which I had another 98 caravan that I was driving that had the same issue with the flashing lights. What is that all about?
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I have a 2006 Sonata and just a few weeks ago the AC/Heater Blower would only work on full blast. You actually had to have the control set a little before the full setting to get it to come on. Both the heat and the AC worked. Now, nothing is coming out on any speed setting. I've replaced the blower resistor and checked the fuses/relay and they seem fine.
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I have a 2000 Buick Regal LS. This problem used to be intermittent but has gotten to the point that I never see a "normal" operating state from my HVAC controller unit, so I need to get it fixed. The problem is that when I turn my car on the controller comes up completely blank except the 4 red lights on the passenger side climate control. The heater then (at the same time) turn on FULL BLAST and is stuck in the 90 degree setting (hottest possible). I got to the point that I pulled the high fan fuse just so I didn't die of overheating...
Today I tried to replace the actual controller unit with a refurbished unit I bought off of ebay. Unfortunately, I had the same result with the new controller...No display at all, but all red lights light on the passenger side climate control. My thought is that the issue is much deeper than a vacuum line (although I haven't checked them yet) or even the controller unit. I've checked all the related fuses and they all seem to be fine. Could this be a computer issue? If so what is the fix?
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I have a 2008 mountaineer that the blower motor runs on full blast no matter what. The switch bars go up and down but blower motor does not change speeds. also upon opening the hood I found 2 large mouse nests ,1 on passenger side fender and 1 center of engine towards the back. Are these related or could it be a switch issue. How to remove switch and test it.
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I have an 08 that the heater either works all hot or cold. It seems that when i try to control the temp it isnt consistent. It will be on hot, turned all the way the right in the red. Great, it gets too warm in the truck so turn it down a little. Then it is too cold. I only turned it down a little, not even in the blue zone yet. I turn it up a little and it is still cold. Turn it all the way up and it is too hot again. What is up with this. I hope it isnt the blend door syndrome. The truck only has 30,000 on it.
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I noticed that I have an unusual "rumble" noise coming from the location of my ac blower motor when it kicks in full blast. When the air temp comes down a bit and the AC slows down or if I switch the ac off full blast under climate control, the noise goes away. I have never noticed this before and am wondering if it is my ac blower motor starting to fail.
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2006 Prius with 58,000 miles. Drive in San Diego and Palm Springs. Earlier this year, the A/C would just cut off, maybe about once a week. The control panel indicated the A/C should be on, but absolutely no function. Drive around for 20 minutes, and all of a sudden, it would come on and work perfectly. It is starting to happen on a daily basis now...sometimes it won't work from start, other times it just cuts out while driving. I can park the car and shut the car off with the A/C working, then come back 30 minutes, and no A/C. It doesn't seem to matter which setting is selected. The control panel accepts all commands, but no function changes when the A/C has shut itself off. Loose connection somewhere? It works about 90% of the time, and blows very cold. When it shuts itself off, no air passes through the vents at all.
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My dad's 1993 Lincoln Town Car runs great but the fan for heat or AC only will run at full blast or nothing. Makes it difficult to drive when it's real hot or cold out. Can this be remedied without costing an arm and a leg? The car is 21 yrs. old and not worth a lot.
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My Prius' battery died this week after a respectable 163731 miles. I barely got it to the dealership . It was sluggish, engine racing, one purple bar and the battery fan was going full blast. It totally freaked me out.
21 working days for battery from Japan. I've been expecting it. I figure I can then drive the car for another couple of years.
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Lately, I've noticed that when I start the car in the morning, the radiator fans come on at full blast, even though it's around 20 degrees F (not all the time, but most days). My temperature gauges all show (what I assume are) correct temps as it starts out cold, water first goes to 200 and stops, then oil slowly climbs and stops at 200 I believe.
They don't climb any faster or slower that I've seen, and usually by the time I get to work (around 20 minutes), the oil temp has probably climbed about 3/4 of the way to normal while the water is steady at 200.
Is this normal? I don't recall this happening, as I would've noticed as the fans are quite loud at full blast. I haven't had a chance to run a diagnostic scan yet, but the car hasn't warned me of anything either.
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I have a 2005 Subaru Forester with 88k on it. I bought it with about 70k on and have been doing a lot of the services myself.
I change the oil religiously. I recently changed the thermostat on the car, cleaned out the reservoir and now the car has new antifreeze. The reason I did this was because cars cooling fan is always going at full blast. This only started about 6,000 miles ago. So since it was a easy job I figured change the thermostat. I am in NY and it has been very cold out, but with my 10 mile commute to work by the time I pull into the parking lot the cooling fan is very loud and the noise is very noticeable.
I recently drove up to go skiing, ( the temp outside was 9 degrees) I was on the interstate going about 70 to 77 mph because the car was going uphill and the incline was significant , I would push more on the gas pedal and I would see the thermostat on the dash going up very closely to the red mark. I pulled over a few time, the fans were at full blast.
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Friend of mine said that the air conditioning on her 2001 Ford Explorer only works when her car is in idle. She said that when she steps on the gas the fan continues to work but doesn't blow cold air. If she stops at a stop sign it works... and so on.
She has taken it to a shop that specializes in air conditioning and he checked and cleaned off a few connections (whatever that means) and thought that would do it but it didn't. She is going to go back this weekend.
I told her that I would think that a specialist would see the idle/drive issue as a good clue as to what the problem is.
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I was driving today and at a traffic light a severe smell of burnt plastic filled the cabin and the A/C blower started to change speed than stayed at full blast and even if I'd turn the knob from side to side or tried to shut everything off with the ""OFF""button nothing would happen........so we drove home and at some point it shut itself off...tried it again and seems ok now.....every dealer closed today and leaving for the USA tomorrow morning.... What the problem could be?
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I have a 2002 Honda Accord coupe with 130K miles on it. A few days ago the AC started to make a loud roaring noise when it is turned on full blast. As you turn it down the noise gets quieter and when the fan is on low the roaring noise stops. Other than making this sound it is running fine and there are no other issues/noises coming from the car. What is causing this noise?
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I have a 2006 F150 4.6 175,000 miles in pretty good shape and well maintained. Lately, the A/C has acted weird. When I first turn it on, it blows air, but the air does not chill until I have a pretty good RPM going. Then it's fine. Once it starts chilling, it's good to go even when RPM is low (like at a red light). It's just the initial acceleration.
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The AC on our '04 RX330 has started acting up. Refrigerant level is fine. When the system works it's ice cold. It'll run more often than not, but occasionally the AC compressor just won't kick on. I searched the forum and found issues in other toyotas and lexus models with the magnetic clutch relay but for the life of me I can't find where that is on the RX. I also saw reference to an AC "servo" in another thread. What controls the AC compressor and what to check?
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When running the heater or A/C I get twice the blast of air when I have it on recirculating air. When I switch it to fresh or outside air it cuts the blast in half. I had thought about the cabin filter being dirty but doesn't both outside and inside air go through the filter? I have a 2001 Toyota Echo.
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The AC in my F-150 Super crew Lariat 5.4 was just charged and works fine until the temp reaches ninety degrees, then it blows hot. What this could be?
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The air conditioning in my 2002 Chevy Trailblazer works but never gets really cold. What is the best course of action to get it working better? A do it yourself kit or an auto repair shop?
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