Santa FE SM (2001-06) :: AC Starts Blowing Warm Humid Air In Stop-and-go Traffic
Jun 1, 2015
This weekend was a nice high 80's low 90's. My AC is usually ice cold. However now that the weather hit that high, when we are in stop-and-go traffic, the AC starts blowing warm humid air. I do see the temperature need creep a bit higher than the normal range.
Once we start driving, after a few minutes, the climbs back down and the cold AC returns. Turning the fan speed down, or turning the compressor off, then on again, seems to work.
What could be causing this? A friend said he has this issue with his car claiming the engine is the issue, not being powerful enough to keep the compressor running right, is that possible?
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I just bought a 2000 f250 diesel truck and am having problems with the ac. When I first turn on the ac it blows very cold and works perfectly but after about 5 or 10 minutes it will start blowing warm and slightly humid air for probably around 5 or 10 minutes and then suddenly the very cold air will come back. This cycle repeats over and over again and I'm not sure what is wrong.
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I've been noticing an odd noise in the brake pedal in our '03 Santa Fe. I don't hear it all the time (almost never on the highway), but especially hear it in stop-and-go traffic. It's sort of a whirr, a "RRrrr". I've googled and watched YT videos and it's definitely not a hissing sound or a grinding sound, nor do I notice any difference in the brakes' responsiveness.
I'm apprehensive of taking it to the dealer for service because I only plan to have this vehicle for at most three more weeks. Have only held onto it this long because we couldn't afford to replace it until we sold our house-- which we've just done, and are about to move to a city about an hour away on 7/5. We'll trade in the car within a couple of weeks of moving.
The noise is definitely from the pedal and isn't anything like squeaking brake pads (I currently live in the DC metro area, so squeaky brakes become very familiar with all the stop-start traffic!). The videos I've found that point to a booster problem have a decided hiss, and it's not that either. Don't want to be unsafe in the time we've got left, but also don't want to throw another thousand bucks (every time something breaks in that darn thing, it always seems like it's about $800) into a car we won't have in a month's time.
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Sitting in stopped traffic for about 45 minutes and AC slowly starts blowing warmer air. Temp about 95 and very humid. Felt like AC just freezing up, but no frost on anything when I looked under hood. Hoping freon problem. About to start looking at it this morning.
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If my car get really hot, it initially blows cold air (the way it should be) for 5-10 minutes, but then it slowly starts blowing warm air until I get the full heater going for about a minute, and then it goes back to cold air, sometimes after 45 minutes the cycle repeats. This does not happen every time, this year I had it happen about 5 times.
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If the outside temp is cool (say below 75) the a/c works, but as soon as the day gets warm it starts blowing only warm air. I took it to the Honda dealership and they said that it was low on freon and that it needs a new clutch and a new coil. They recharged it and added dye. A week later I took it to a good independent shop that specializes in Honda repairs. They said that the compressor has power and ground and is full of freon and dye but they found a bad thermal switch and that I need a new compressor. I have no understanding of car a/c systems and thus don't know which repair sounds like the right one (if either) based on the diagnostics that have been done.
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It works great for the first 5 minutes and gets icebox cold. I can almost see my breath then the system starts blowing warm air and stays that way. I've had the coolant recharged and the shop tells me there is nothing wrong with it. Of course it works for them.
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I have a SF 2009 Limited. Since I bought it 2 years ago, I noticed the heater blows luke warm air. Not hot. It takes 20min for the cabin to reach 22degC when it's only 0 outside.
It was like that when brand new.
It has the auto temp control, so it might be playing tricks on me but I don't think so.
I am tempted to find the pipe feeding the heater radiator and insulate the pipes. Maybe the heater only gets warm liquid.
What else can I do?
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I have a 2001 f250 sd 4x4. For the past year it will blow cold air unless I'm in stop and go traffic then it blows warm air. Engin temp thermostat and water pump are fine. Yesterday it quit blowing all together and it really wouldn't bother me but where I live the morning temps and rainy days are causing the windshield to fog up and my defroster not even working. Where can I start to get this fixed.
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2004 pontiac grand am, after driving and shutting off the car, it will not restart or stalls out while waiting at traffic lights. When I try to restart the car, all I get is clicking sounds, only does this on warm or hot humid days. The dealer told me to just hold down the gas pedal and crank the engine till it restarts. I have tried the turning on the key for a minute, wait, then turn the key back off, and then to restart, but that doesn't work either. If I wait for a good ten minutes, the car usually starts. When I turn on the key I do hear the fuel pump kick in. I have replaced the fuel regulator, ignition switch, keys, computer chip in the ignition system, battery, and starter- twice. I have heard that it could be a crankshaft sensor? No codes are showing up when this happens.
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Last week I noticed an erratic temperature gauge while I was in stop-and-go traffic. It would go from just below halfway to nearly the red in about 7 seconds, bob around, go down a bit, then up, back down to halfway and sit for a while, etc. etc. etc. I stopped, added a little water to the reservoir and car was fine for about 20 minutes but then it started up again.
Went I got home I checked oil and it was low. I added a quart. After this the car has been fine.
Until today. It did go into the red a couple of times and sat there for a few seconds. I was surprised there were no lights or warnings of overheating! I opened the hood when I got home and didn't get the impression that the engine was particularly hot (though the upper radiator hose was hot).
I read this might be caused by air pockets in the cooling system and I need to "burp" it by taking off the radiator cap, starting the car, running the heater, and then topping up the radiator when I see the coolant level go down.
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Well, my saga continues on my intermittent AC problem on my 99 f350 v10. As before, the AC blows cold but mysteriously stops working on occasion when climbing a grade or stopping at a light in warm weather. I bought a gage kit and runs ~ 45/250psi on the low/high gauges. Clutch is stopping and the metal tube from the accumulator tank runs warm when this occurs.
Seems like the problem occurs when the under hood temp reaches a certain level. Thought it might have been one of the switches but the pressure seems to be OK when these problems are occurring. What/how to check to find the problem? some of my thoughts are:
1. Wire a light in the clutch engagement circuit to see if the problem is in the compressor clutch coil not working when powered up or some heat related failure of the wiring continuity.
2. Check the Hi and low pressure switches for continuity when this is happening. to do this I need to know a few things- location of the high pressure switch low press in on the accumulator) and whether the switch should be open or closed in normal operation. Also can the switches be replaced without losing the charge in the system?
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2001 DOHC AC all of a sudden started blowing warm air when on max AC, not regular cabin air but warm air as if it is on heater mode. It has automatic climate control. I checked the charge and low side is 30psi and high side about 130 psi. Pipes in engine bay are sweating so cooling is occurring. The compressor cycles once or twice when I first turn the car on then just runs continuously. I put some charge in but it didn't do anything so I didn't want to overcharge it. I was thinking maybe stuck blend door but how would I check for that.
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A/c is fully charged. Could be blowing cold one second, and blowing hot humid air the next.
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With summer heating up so is the engine. Temp stays normal at freeway speeds but as soon as I hit stop and go traffic it shoots up. Water pump is two years old. I flushed the radiator and didn't get much gunk out. Both fans are running when the AC is on. If I shut the car off but leave the key on the fans do not run when the car is not. I can't remember if they used to or not.
2001 Pontiac Grand Prix 3.1
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I have a 2007 Saturn Relay minivan. The front heater blows hot but starts blowing cold when you stop even for a red light but will blow hot again when you speed up and the rear heater never does blow hot, what could cause this? This vehicle has about 93,000 miles on it.
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I have a 2001 Malibu that starts easily when cold but when it is warm, up to 4 hours after turning if off it is very hard to start. It will try to start then stall and then I eventually have to floor it to get it going. A big cloud of smoke come out of the tail pipe but then runs at a high idle. Sometimes I will get a 3000rpm idle and then after about 30 seconds it will idle right. I have a new fuel pump, a new Charcoal canister, a new vent valve solenoid, a new fuel pump relay, a good battery and a good starter. I also checked the fuel pressure regulator and no gas leaks out. Also have had a full tune-up. This problem turned out to be the Engine Coolant Temperature Sensor.
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My wifes car AC just started blowing warm. I figured it was getting a little low on refrigerant. So I went and bought a can with the gauge on top, and I connected it and it was reading half way into the red zone....way overcharged. But nobody has put any in the system since we bought the car over a year ago. The AC has been great for all this time. So how can it be blowing warm and be overcharged that much without overheating the cars engine ? The clutch is coming on with the compressor?
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I have a 91 Mitsubishi gto TT. I love my car and i was really hoping to repaint it soon but this problem is becoming more apparent. My car runs fine for the first 15 minutes, runs like a beauty! but then once it is warmed up it starts to struggle. I cant accelerate hard because it hesitates alot. The problem im having is pin pointing the problem. Ive searched a lot of stuff on the web and some people have similar problems.
Could it be bad spark plugs and wires causing some cylinders not to run properly? If so then why does does it run fine for the first 10-15 minutes?
I'll probably have my plugs and wires changed to see if that changes anything.
I just dont understand why my car accelerates great when cold but when hot starts to run sluggish.
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I have a 2003 Hyundai Santa Fe. Within the last 2 months or so I have changed my timing belt, spark plugs, and all belts that needed to be changed. I notice that when I am idle at a traffic light, the car is a little rough or bumpy. Is this normal for its age, or should I be looking at something specific.
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Was in town stopped at a traffic light when my 2003 Santa Fe just shut off. No warning, started right back up again, no CEL, no DTCs. Scary. I'm happy it happened with me driving the car instead of my daughter driving. Also happy it didn't happen on the highway.
I've had hard starting issues for a while now. Replaced crank sensor, it's fine for a few starts, then goes back to hard starting, but I hadn't had a problem in a few weeks.
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