Phaeton :: Radiator Fans Coming On At Full Blast On Cold Morning
Mar 3, 2011
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 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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Both my radiator fans run all the time, even if the engine is cold. Soon as I fire it up, even if it's 0 degrees, they are running. To be clear, as expected, the fans do not run if the car is off.
Based on these symptoms, what components could be the culprit?
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The two Radiator fans are always running even at start up on a cold day. I have not had time to investigate as yet but I am assuming it is the temperature sensor located near the thermostat or a relay. No CEL on. What it likely is and how to approach the trouble shooting?
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After about 10-15 minutes, following a cold start, this 2007 BMW X3 3.0 six does the following:
1) automatic cabin fan behaves erratically, jumping back and forth between low and high speeds;
2) cabin air does not heat;
3) electric radiator fans run on high;
4) coolant temp rises to normal, but then will suddenly jump up to full hot.
At this point, driver of course pulls over and shuts off engine. The amazing part is this: the engine can be re-started IMMEDIATELY and all of the above problems vanish instantly. Radiator fans shut off, temp returns to normal, cabin fan works normally, and cabin heat comes on. I'm thinking sticking thermostat, but why does shutting off the car momentarily fix it? Change of water pressure when coolant pump stops running?
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I bought my car last May and never noticed the radiator fans running, but over the past couple of months they've been coming on (or at least running at a higher speed) pretty much every time I take it for a longer drive. They appear to come on only when I'm idling and turn off when I start moving again. The temperature gauge is steady at just below halfway. I'm certain this didn't happen previously, or if it did the fans were at a low enough speed that I didn't hear them. In my inexperience I would have thought they'd be less likely to run in the winter, and we've been having continuously cold weather (<30 C).
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I don't understand what is going on I noticed smoke coming from my fans radiator fans and I'm pretty sure that it was motor being fried I've gone to the junkyard and bought a used assembly hooked it up and still nothing could be a possibility that when the motor fried it fried the control module for the fans
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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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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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I have a V8 engine, and I have been getting the coolant overheating warning come on once in a while.
The engine fans go crazy, and the temperature needle on the small round gauge climbs all the way to red then the coolant overheating warning comes on in dash screen.
This can happen right after I turn the car on, or on occasion, it can happen as I am driving around the city.
I stop, switch the car off, and I turn it back on after a minute, and the car is just fine. So, basically, it doesn't seem like the engine coolant is actually overheating, but the fans and warning systems seem to think that they are. The fans are pretty loud, and its noticeable when they go on, and when this happens, I know that the needle will go all the way up and the warning will go off. I also know that if I turn the car off for a minute, and it will be just fine.
The conditions are random for when this happens. So its not when its particularly hot or cold or anything predictable. Could this just be a sticky thermostat? Is it a bad water pump? Bad battery?
The trouble is that now I am afraid I cant take a real drive. Around the city I can just pull over, but I am afraid to take the car two hours out or something.
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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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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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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 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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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 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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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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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 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 owned my 2008 yaris sedan since new. With the temp knob turned to full cold, the air coming in (all vents I think) is always warmer than the outside air. This is annoying; I am forced to turn on the air conditioner even when the outside air is just right. I suspect that an internal flapper valve of some sort is not seating properly and is leaking warm air.
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As it was such a matter of time, my fans on my 24v gave up during winter, no big deal as it was a pretty cold winter but now that spring is around the corner, I gotta fix this issue. To they change for the same OEM unit that will die in the next 30k miles.
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