Golf IV R32 :: Fans Won't Turn On - Car Started To Overheat
May 7, 2012
Started the R and moved it out of the garage after the motor build. At which during that time I replaced the large fan with a new one from Ecs and the small one I took apart and cleaned up after I found the Diy for it.
Before I rebuilt the motor the car started to over heat on its last ride home before the rebuild (Neither one of the fans would turn on). So I replaced the switch on the radiator today and let the car warm up and the fans didn't kick on again. I checked the fuse and it good but I'm not sure where the relay is.
Also my A/c is not charged up. I also touched the coolant lines running to the Aux radiator and they are cold. And I do hear the after run/electric water pump running.
The green coolant temp sensor is clean and plugged in. Could it be the thermostat? Are there any fuses in the panel that sits on top of the battery that deal with the fans? Is there a way to test the coolant fan control module?
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The fans in the engine bay wont turn off. As long as the car is on they run. they do turn off when the car is off.
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So this seems to be a common code that is thrown when you near 100k miles, I'm at 77k .. This thread seems to be the most organized [URL] ....
"Long story short, there are 5 main reasons this problem can pop up, listed in order of likelihood, least to greatest:
1) Coolant sensor
2) Thermostat
3) Bad fans
4) Coolant mixture
5) Water pump "
My issue is that the only ones I'm (probably) able to rule out is coolant mixture and bad fans. My radiator fans do turn on from time to time, so I thought I'd ruled that out (unless it would throw a code for not turning on at appropriate times?)
I heard of a test to turn on your AC and see if they turn on, but my AC hasn't blown cold air like ever, so I don't know if that affects the test (probably not?)
A couple years ago I had a shop replace the original thermostat with the new one, or was it the coolant sensor, or both (ugh, I don't remember!) That leaves thermostat, coolant sensor, and water pump.
I guess my main question is is there anyway to find out which it is between these 3, without spending so time, money, parts etc? It doesn't seem the coolant sensor is easily accessible for one.
My car has been really slow recently but I also need to change the spark plugs, I'm doing that this week. I cleared the CEL/P2181 code and it returned a few weeks later,
I'm starting to change my mind about this car being easy to maintain/reliable, I'm always on time with maintenance and with only 77k miles on a 2004 car.
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I'm having an issue with my fans on my radiator. They don't turn on when the engine gets warm and the A/C is off. I've replaced the crack pipe, water pump, and belt tensioner. I've replaced the fans not to long ago because the low speed wasn't working. I tested low speed at the fan connector and it wasn't working. After replacing fans I tested and it was working when jumping the pins on the thermo switch connector. I got both low and high speeds to work during that test. I've since replaced the thermo switch to see if it would fix the issue but the fans still won't come on without turning the A/C on. Any other tests I could do or should I just try to get another thermo switch.
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My 03 Golf ac is not working and i am looking for a wiring diagram/ troubleshooting chart. the cooling fans turn on low and I hear the engine surging like the compressor is trying to cycle but it is not.. When I jump the low pressure switch the fans go to high and no power to the compressor. I get a flash of power to the compressor but just a blip every ten seconds. I am trying to check continuity of the ac clutch but having a difficult time getting in there hot. I just bought the car and fixed light body damage on the right front but it was not even bad enough to hurt the washer bottle. Hard to believe the hit caused damage to the ac? AC seems to be charged with about 100 psi static pressure. Why are diagrams so hard to find?
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I have an odd problem. My AC will not activate until the engine gets hot enough that the radiator fans turn on. Once they do, the engine RPMs drop, the clutch kicks in, and I get frosty cold air with no problems. I already replaced my FCM and checked all fuses. It worked consistently all last summer and considering the AC is nice and cold once it kicks in, I don't think this is a pressure issue and it was recharged at the beginning of last summer by a good shop.
I changed my coolant flange a few months ago, same temp sensor. Didn't try AC back then as it was cool outside still. Could this have something to do with it? I have proper readout on my dash. Maybe it's the ambient temp sensor?
2.0 Getta GL AEG 230,000 miles.
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I have a 1992 celica GT 2.2l A/T. I was on my way home today from college and my car started to overheat right before i made it home. It was steaming a bit and the temp gauge was tacked out. when i pulled into my apartment i noticed a light brown colored liquid in my parking spot, and alot of it.
I saw this same liquid at my college campus and assumed it was a coffee someone spilled near my car, but now i know it came from my car. I haven't had a chance to check my houses yet as i just got home and my cars still really hot. I know its not power steering fluid b/c that's been empty all week b/c my reservoir leaks. Why my car is overheating and what liquid is coming from it. Oh also the liquid seems to be coming from the right front portion of the car.
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OK, we have a cavalier that is slowly dying but until we find a good price on a used car we are looking at it has to keep chugging along... It started to overheat about month ago, just when you go up a hill otherwise it is fine (doesn't overheat but a few lines from the red zone!). Mechanic said it was a head gasket and we have noticed that the coolant level is down slightly... can it be a head gasket yet still drivable? Also about 2 months ago the car needed a new water pump, flushed and filled, could it just be the new water pump was bad? No other issues, heat works fine, no puddles under the car etc....
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My car just started over heating and I checked the fans and they are not running. I'm new to the VW family and although I love the way this car drives I've been baptized with quite a few problems.
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I've got a 2001 Volkswagen Jetta 1.8T Wolfsburg Edition.
Recently the temp gauge sits at 260* as soon as the car starts, but it's not actually overheating. Car runs/drives fine and will do so for many, many miles. Even in stop and go traffic. Was told the thermostat was replaced, but that didn't fix the issue although it doesn't sound like a thermostat issue since the car isn't actually overheating. Coolant is topped off as well.
I am thinking it's a bad sensor. Where is it located on this car?
Car is a friends and she said she took it to a shop to have the coolant checked and they were also the ones who did the thermostat.
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I have a 2004 Camry that the cooling fans won't turn on at all. I checked one of the cooling fans by running direct power and it worked. I then checked all the fuses relating to fans and A/C. Then checked relays by using the horn relay in Fan 1 and Fan 3, which are both 4 pin. I bought a new relay for Fan 2 as it was a 5 pin and still no change. The fans don't come on at any stage, turning on A/C or letting the car idle to the point of the water boiling from overflow. I'm thinking it's not the sensors as the fans should turn on when the A/C is turned on.
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I have a 2008 Prius, and the cabin fans will not turn on. I've tried fiddling around with all the AC settings and fan speeds, but I can't get to fans to work at all.
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I m having trouble figuring out why the radiator fans wont turn on, Even when the ac is turned on it still doesn't turn on, I changed the coolant temp senser. still nothing, i also ran a whire from the battery to the fan and they both turned on. I also stitched around relays and checked fused still nothing. 2000 pontiac grand am 2.4L engine 4dr auto trans.
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I have a 2010 dodge avenger sxt replaced fans but won't turn I connected everything back together still nothing....
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I have a 2001 toyota camry ce in Miami, fl which is overheating. the fans seem to come on only if i turn on the a/c. however the temperature still rises and gauge needle hits red. if on idle the fans never come on. observed fluid inside radiator with cap off and it does not run through while on idle with a/c off, it just gets hot. changed thermostat and added new 50-50 antifreeze, still same. I'm suspecting a switch but why is fluid never running even when hot? I even drive it with hood open (unlatched) to let a bit more air in and still overheats, even with a/c on and fans running (again, they only turn on with a/c on), it overheats.
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So I put in an MFA cluster a couple months ago and now all of a sudden the other day it started flashing STOP motor oil pressure low turn off car. It happened twice right in a row. I took the car to my local firestone changed the oil and pulled out. Five mins later it did it again. It only seams to go off when my rpms are really low in second or third gear. I'm guessing it's a bad sensor cause my oil level is fine.
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I have a 2004 freestar that cooling fans come on when engine gets to temp but not when I turn on ac it has 5 relays for the cooling fans and they run in series and a dropping resistor. Ithink someone replaced #2 relay with the wrong one and has caused my problem because they did not know what they were doing...
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I have a 2000 Dodge Grand Caravan that has 195,000 miles. My radiator fan won't turn on and I'm stumped! The issue presented itself with a check engine light and the radiator cooling fan not turning on. The trouble code indicated the cooling fan relay was faulty. In all cases below, I tested the radiator fan by turning on the air conditioning (thus forcing the cooling fans to run) and also for it to come up to a high temperature coming close to the danger zone.
1. Fuse - first tested the fuse and it was OK. Had to start with simple things first.
2. Cooling fan relay - I replaced the relay which has a reputation for failing on the Dodge. Still the fan did not kick in.
3. Cooling fans - tested the cooling fans and the motor was seized. Replaced the cooling fans and tested them by jumping them. The cooling fans still do not turn on. There is no voltage leaving the cooling fan relay and coming into the cooling fan harness.
4. Wiring - tested the wiring between the relay and the fans. They checked out OK (good continuity and resistance check). There is no voltage leaving the cooling fan relay. Now it's getting more complicated... I unplugged the wiring harness from the ECM and tested the wiring between the ECM and the cooling fan relay. A-OK.
5. ECM - it is unclear how to check the ECM for functionality of the cooling fan.
There are 3 wires (supply, ground, and switch wire?) The supply voltage and ground is good, but I don't know what voltage the switch wire should be. I've read that it is pulse width modulated so I can't measure this with a simple voltmeter. I've also read that the switch wire goes to ground thus triggering the relay. I don't know which is correct. Several mechanics I talked to were skeptical that the issue is with the ECM, they knew of very few instances of this being the culprit. I even replaced the new cooling fan relay with another new cooling fan relay on the off chance that the replacement was faulty. Did I miss something in my logic and diagnostics? I've resorted to wiring a switch directly to the cooling fans and toggling them on and off.
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I have a 2000 vw Gti vr6. It leaks coolant smokes and starts to over heat when idling. Does fine when driving down the road. It has a new radiator. When pressure tested I can see a little stream of coolant coming out. But there's no space in the engine bay and I can't see exactly where it's coming from. Like I said it only happens when it's Idling for an extended period of time. It does fine going down the road.
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X2 nights ago at 11:45pm I was driving home from a friends house with my gf and were going about 65 on the highway and it's lightly raining, then all of a sudden my headlights, windsheld wipers, turnsignals, my ac/fans all just shut off so I had to pull over right away. After sitting there for about 15 mintues I figure out my high beams still work but only if I hold them on(clicking it on doesn't work. So I drive home and the next day check all the fuses in the drivers door and they r all fine. Everything else works in the car but the stuff stated above. My car was reposesd about a year ago when I lost my job and they put this thing I have to enter a code every month, it messed my windsheld wipers and turn signals up before but not anything else! But it still works and the other stuff doesn't, and behind the dash it sounded like crackling and smelt like burning electric right before it shut off.
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My R now has 78k on the clock so I guess it's time for the obligatory issues with the radiator fans. My car started running hot from time to time, not constantly. Brief explanation of the issues and my "diagnosis" for each:
Without the A/C turned on the fans don't come on - when I turn the A/C the passenger side comes on all the time (faulty switch). Driver's side fan is intermittent - usually it turns on with the a/c but if it doesn't a tap on the center with the lug wrench gets it spinning (stuck brush).
The main thing I want to make sure is that it's not a thermostat issue as well (or instead of the switch). The heat works fine - I've been blasting it every time I hit traffic on my way home just to ensure that the car doesn't overheat. My assumption was that if the heat works then the thermostat is opening to allow the coolant into the heater core.
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