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Re: Vw Golf mk v
This sounds like a problem with the engine temperature sensor, but without knowing which model / engine you have I can't tell you where to look. The best course of action is, in my opinion, to get a fault code check done on the car.
If you are technically minded you can get an interface cable quite cheaply and run some free VAG software on a laptop to get a list of fault codes. Interpreting them is a whole 'nother ball game, but there is a lot of help available online.
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That fan is to cool the engine. It is normal for it to continue to cool after the enging is shut off and operates much longer in hot weather than in cold weather. If you think it is cooling to long before shutting off I would check the cooling system to see that it is operating correctly. If no and the engine is overheating somewhat that is why the fan runs longer.
Is the heater nice and hot when the needle shows low temp? If the cooling fans turn on and the heater is hot, that leads me to believe the coolant temperature sensor is bad. You should try replacing that sensor. They are only $6 usd here. As long as your check engine light is not on and your fans are running, this will not hurt your car... but this is something you should fix soon if you can. Make sure the engine is cold when you replace the sensor
When there's something wrong with the brake pressure that handbrake warning light comes on.
The ESP warning light could be caused by a lot of things, but most likely it's a dirty fuel filter. Don't take my word for it though, just go to the VW dealer and have it read the faultcodes from the ECU, which should point you/them in the right direction.
Alternatively, when you have the right equipment (= VAGCOM + cable) and knowledge, you or a friend yould diagnose the ECU yourself.
From the sounds of it, you'll need a small service (air filter and oil filter change, etc.) anyways. Don't forget to reset the ECU (or dis- and reconnect the battery) afterwards to erase the faultcode from memory (when there's still something wrong, it'll return soon enough).
fuel relay could be faulty. i think its number 30 or 167 in the fuse box under the driver side steering. it could also be the fuel pump or connector on the fuel pump under the black metal plate under your trunk carpet. you could try manually throwing in fuel into the intake to make sure its not your car's ecu or ignition system. if it starts and stays running it could be what took me a few months to discover after i had intermittent problems. there a small vacuum hose from the fifth injector on a 1997 mk3 gti (4 cylinder) that connects to the injector rail. i think its some kind of activation for the electronic injectors. my pipe was broken and i just cut it and my car hasnt been better since! i know this is an old question but i hope it helps someone out there!
Apparently, this problem you are experiencing is quite common in VW MK4 Golfs, it's not the bulb but the lighting connection behind your switch. If you bang the right hand side sides your gan controls your fan lights should appear again. Sounds crazy but it's true. I know few people with VW Golf who have this problem.