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Anonymous Posted on Jul 18, 2014
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Overheating indicator flashes, but has oil, water.

Overheating indicator flashing,but Temperature gauge stays stable. Did a pressure test on radiator all good, has water, has oil, does not leak. Fan switches on normally. Is the temperature sensor faulty?

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Neil

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  • Volkswagen Expert 451 Answers
  • Posted on Jul 20, 2014
Neil
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Joined: Apr 21, 2011
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Hi. The contacts in the Coolant bottle get contaminated and then don't pick up the water level. Brige the contacts at the water botlle and start the car, if the coolant/temp light behaves for 5 min or so after starting the car, then change the coolant bottle/resevoir.

5 Related Answers

Anonymous

  • 272 Answers
  • Posted on Nov 28, 2008

SOURCE: vr6 golf temp

As a safety measure, fit a new thermostat and senser. Then top up with antifreeze and water pertaining to where you are.

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bs77bird

  • 144 Answers
  • Posted on Sep 01, 2009

SOURCE: temperature light is flashing red, coolant is

fan relay is under the frame on the left by the fans. but most likely the fans themselves have gone bad check the fuse panel on top of the battery see if it is burned or blown fuse this is caused by the fans going from stop to high speed to many times. you will flat 40 or 50 amp flat blade fuse and both fans sorry for bad news

cy schousboe

  • 2002 Answers
  • Posted on Feb 20, 2010

SOURCE: radiator cooling fan stays on after car is turned

It depends, how long is it staying on after you shut the car off and how hot is the temp guage when you turn it off? The fan circuit is separate from the ignition and is designed to run until the engine reads a specific temp irregardless of whether the ignition is on or not. Hope this helps.

Testimonial: "Cheers, but the fan stays on till battery runs flat,,,,,,,Gixxer Tim,,,,"

Jonah Oneal

  • 14092 Answers
  • Posted on Feb 02, 2011

SOURCE: Help! I'm stuck and stumped. 2001 Beetle GLS 2.0

SOUND LIKE COOLANT FANS HAS A FAULTY THERMO SWITCH LOCATED AT THE BOTTOM OF THE RADIATOR ON LEFT HAND SIDE.CHECK THE FUSES 8 IN THE ENGINE COMPARTMENT AND CHECK FUSE 16 IN THE PASSENGER COMPARTMENT FUSE BOX.WHEN ENGINE OVERHEATING IF BOTH COOLING FANS WORKING.OVERHEATING PROBLEM COULD BE BLOWN HEAD GASKET.CHECK ENGINE OIL LOOKS LIKE MILK HEAD GASKET LEAKING.SEE WHEN YOU DRIVING LOW AND HIGH SPEEDS THE COOLING FANS SUPPOSE TO BE RUNNING.IF THEY NOT RUNNING THAT IS YOUR OVER HEATING PROBLEM.

Anonymous

  • 76 Answers
  • Posted on Feb 06, 2011

SOURCE: 2001 Beetle GLS 2.0 Overheating- Two weeks ago the

It is possible that the pump failed because of an overheating problem. Make sure the fans run by turning on the air conditioning. They should operate as soon as it is turned on. Bad fans are a common problem. The pump should not have been leaking after replacement though. Make sure you have no leaks first and foremost. Then make sure the fans work. There is also a fan control module located in the area under the battery, but it is difficult to properly diagnose. If the fans do not turn on with the a/c, you can jump the wires at the thermo switch. One should be power, and when you jump to one wire they should go to low speed, the other high.
If you like you can ask more questions directly, I was a VW master tech from 2000 to 2008.

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Temperature gauage stays at 100 degrees but car seems to run ok
Is the needle going to the red part or the upper 3/4 part of the gauge?

If so you definately have an overheating problem. The car will run fine until it's too late.

Check the following:

1. Electric fans are coming on at temperature
2. Take off oil filler cap and check colour of oil. Creamy brown color indicates water getting into oil passages through head gasket or cracked oil passages in block.
3. Take off radiator cap when cold and check for coolant color as per step 2. Also check for coolant flow when keeping engine revs up. If not much flow (should be like a river flowing), could be blocked radiator.
4. At operating temperature hold top then bottom radiator hose with hand. If either of these 2 are still cool it indicates a faulty thermostat.

Otherwise water pump fins could be corroded.

Hope this helps :)
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