Honda - Pilot - Airconditioning :: 2003 - Heat Starts To Blow Out Of Upper Vents When AC Is On Automatic
Feb 4, 2012
Problem: About 10 minutes after driving, the heat starts to blow out of the upper vents when the a/c is on automatic. The heat comes out even if the outdoor temperature is mild (55 – 70 degrees Fahrenheit) and the cabin temperature is warm, which heats up the SUV quickly making it very uncomfortable. Turning the a/c off tends to somewhat solve the problem some of the time, however, occasionally hot air creeps through the vents even with the a/c off. The a/c often makes a gurgling sound whether it is on or off. I noticed today (2/3/12) that the back vents are not affected by the problem, so the very warm air is only coming from the front upper vents.
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I have a '97 Honda Civic w/ about 168k miles, am hoping to get at least another year or two out of it before I go looking for a used Honda Fit or something similarly budget-minded to replace it. I just ran the A/C on cold for the first time this season (I realize I was running it all winter when I defrosted the windows), and it was clearly not working, just blowing hot air. Now, the last time I had anything done with the A/C was in 2005, when I was in a minor accident and the very nice mechanic flushed it and replaced the freon (if I have that right) for no extra charge in the course of uncrumpling the front of the car for me.
Which brings up two issues:
1) I no longer have a trustworthy mechanic where I live, and have had much difficulty finding one, and
2) the car already has a salvage title so is worth about $500 max.
Now, obviously it is worth more than that to me, since it will still be cheaper to fix than get anything else, but I have the impression that A/C repair could get quite expensive, and it is enough to make me wonder if I could afford the monthly payment and insurance increase on that used Honda Fit..
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2003 Civic, ~180,000 miles. Previously had overheat problems, replaced head gasket, timing belt, water pump, thermostat and hoses (+ a few other things) No longer over heating, but there is no heat coming from the vents unless the car is over 2,000 rpm. Hoses to the heater core are both warm/hot, so flow through heater core seems to be good. Also AC has same issue no cold air unless over 2,000 rpm. Is this the control to the blend door? Are they operated by vacuum and with a leak, need higher vacuum to operate?
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I recently purchased a used 2006 Honda Pilot. I now notice a mildew/musty smell that appears to come from the ac vents. I only notice it when driving with the windows down, right after I turn the AC off, and sometimes when I first get into the car. I do NOT notice it when the AC is running or when the fan is blowing. I have had the car detailed twice (thinking the odor was coming from the upholstery) and have hired someone to spray an odor eliminator spray into the vents and air intake. I have also changed out the cabin air filter. None of these actions have worked and the smell remains. I love the car but this odor is really annoying me.
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2002 Echo, automatic, 190k miles, no troubles with it. My AC and Heat have always blown out the vents, regardless of the direction that I want them to come from. The dial that should send them through the vents, the dash, and at your feet doesn't really do that much to send the air anywhere except through the vents.
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I have a 2000 yukon and the climate control stopped working. The defrost works just fine but the heater/ac stopped working nothing blows out from my vents when ac/heater setting is on. I checked all fuses and wires and everything is ok and connected. I just replaced my cd player and the next day climate control stopped working. I went back and checked the wireing of the cd player as well, everything is fine. Would i need a new climate control, or senser or is there a fuse on the heater itself.
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The heater fan runs fine. Cold air comes out of all the vents (defroster, floor, dash). There is plenty of coolant in the system, and my mechanic advises the engine is running at the correct temperature. The heater hoses at the firewall are warm/hot as if coolant is flowing through. Flushed the heater core (but that didn't fix the problem). My mechanic now wants to drill some holes in the duct work to see if there is a mouse nest or some other obstruction.
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Nothing will blow out from vents, with heat or AC. I checked the fuse under the hood and that had continuity, I checked the 7.5 fuse under the dash and that was fine. I also replaced the blower motor resistor and the blower motor with brand new ones. Also used a test light to make sure power was getting to the resistor and motor and that is all good.
2004 Honda Accord EX Sedan .....
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I recently replaced the transmission in my car. I put new oil pan gasket, valve cover gasket and plugs in it. Got everything back together and now it won't stay running. It starts but will not stay running . I pulled the plugs out to find they were the wring ones that a was sold So They gave me the correct ones. Still doing the same thing. I've checked every connection. All are plugged in all lines are hooked up.
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My 2003 S60 tried to make my life interesting yet again by refusing to blow air through the vents as normal. Only a little finds its way to the vents. The fan sounds good and strong, and the temperature is proper based on my setting. It's like it's stuck somewhere between the three settings for the direction of the fan (head, torso, and feet.) It usually works fine for a while, and then it's like a computer or flap gate get tired and gives up...
It may be relevant to know that this issue occurred around the same time my cluster started dying. I have since reflowed it and it is working as normal. Unfortunately, the climate control system is still angry.
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Ok I have a 97 f150 4.6L. My radiator has been bad for a while. With brown rust color. I replaced my radiator, thermostat, new upper and lower hoses. Everything runs great but I have no heat. I flushed everything including the heater core. Core is not leaking into cab, and both heater hoses are cold. What should I do next FYI heat worked great until 5 days ago.
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The lock in the cargo hatch of my 2003 Honda Pilot is loose and wobbles around -- you have to really slam the door hard to get it to engage, and it rattles. I went to Autozone and showed it to them, and the guy pulled the trim molding out slightly and retrieved two short screws with large flat heads. Said I needed to remove the trim panel and put the screws back in. So -- how do I remove the trim panel so I can do this? Do I need specialized tools, and is this something I can do myself?
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I have a 2003 pilot with 182k miles on it. Just started having tranny slippage after a tranny code and burnt fluid. Changed it and did this for like the next 3000 miles. It began to start slipping between 2,3 so did a complete flush with new fluid and still same problem. Question is should I pursue the new tranny with upgrades or just look for another vehicle.
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I have a 2003 Jetta GLI. When i turn my a/c on some of the vents blow harder and colder than the others. Why that would be?
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I have a 2003 Honda Pilot with 117,947 miles on it. When I reach 40 mph there is a shuttering sound that vibrates through the front floor boards. Took it to a Honda dealer and they could not duplicate the issue. It happened intermittently. Does not appear to be related to outside temperature or level of gas in tank. What the issue may be for the shuttering?
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After some diag I got the A/C to blow out the front vents. There are million threads on this issue half of them are never figured out. This is the second time I have come across this problem so will make this really informative for those who have this problem. If you A/C blows to defrost, yes most of the time its going to be a vacuum leak issue.
Step 1) turnkey on engine off, stand by passenger fender and listen.. can you hear the pump running? If it is your pump isn’t dead.
Step 2) does the pump run for 30 seconds then shut off? You may not have a vacuum leak. If keep’s running for ever you have a leak. Inspect all lines, especially those going down to the hubs for cracks. Also inspect vacuum lines under passenger glovebox.
Step 3) can’t find a leak? Disconnect the line going to the ESOF solenoid and plug it, if you pump stops running then your ESOF solenoid has an internal leak. That was my problem 6 months ago, replaced ESOF, A/C blows normally.
Try This Second! So my AC isn't blowing through my front vents again.... (more diag)
AC not blowing through vents and can’t find a vacuum leak? Take off glove box door, turn AC control switch to floor/defrost/front vents, watch the metal arm connected to the side of the big black box move up and down into various positions. I noticed on mine the arm will go down in positions (floor or defrost) But it will not move up! Which needs to happen to switch to front vents. If I push the rod up by hand manually, the ac will blow through front vents, and stay blowing through front vents even after I let go. PIC of metal arm thing connected to diaphragm, which changes air flow by moving flap inside the big black box
I am guessing the Diaphragm is the issue? The truck will continue to blow from the front vents even when the truck is shut off and restarted, it will stop when I switch the ac to a different position, it will not return back to front vents.
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I recently moved from TX to MN and it's getting cold enough to need heat in my car. Well I've turned it on and nothing but cold air comes out. I've check my coolant level and it was getting close to low, so I added more and I've checked the fuses and they look good. So, what it could be or how i can fix it?
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2004 Tahoe that started with no heat in rear. Checked all hoses and they get hot all the way to back. Replaced rear blend door actuator and worked for a little while. Tonight, took a 90 minute trip and it blew ice cold until suddenly it started blowing heat 45 minutes into trip but then went back to cold after about 10 minutes. Actuator is electric not vacuum. Could it be in the controls where you adjust the temp?
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2001 F150 5.4 4wd - AC not working but when I turn the temperature dial to the blue side and turn on the fan, super hot air comes out of the vents or wherever I direct the fan to blow (Floor, defrost, etc) I know it shouldn't blow ice cold especially since my AC doesn't work but.....shouldn't I feel a temp change coming from the vents when I move temp dial from the red area to the blue? It's max heat wherever I have it set.
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About mid-October I noticed when it as real cold out and I had the heat running whenever I would come to a stop I noticed there is very little to no heat coming from the vents, despite the engine being warm and running at operating temps. At the time I was working for a shop and I asked one of the mechanics what the problem was. He said that it was the radiator not having enough coolant.
Turns out when we pulled the cap the coolant res, was just about bone dry. So we added in about a gallon or so of coolant with the truck running and sure enough at idle the heat was back.
Fast forward to the last couple of weeks and when I am sitting at idle again same thing happens. So somehow the engine is losing coolant. Its not ending up in the oil (no white on the dipstick) and there is not a coolant leak. As it sits there is 255,300 miles on the truck now. 1999 5.4L F150....
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I noticed a couple weeks ago after starting the truck and turning on the a/c that nothing was coming out of the vents. I found it odd when after driving a few miles the a/c kicked in and started blowing cold air. Today I needed to put on the defrost and same thing, nothing came out of the vents. I drove around for a while hoping it would kick in just like the a/c did but nothing. I did check the fuses and relay. When you turn the control either to heat or a/c you can hear a clicking sound under the hood. It's trying to engage but nothing is coming out of the vents.
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