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General => The garage => Topic started by: ASH on 26 November 2003, 16:58

Title: MK2 overheating?
Post by: ASH on 26 November 2003, 16:58

The water tempreture warning light keeps flashing on, but the temp gauge sits dead in the middle?

The warning light flashes on when the mfa reads about 124.

any ideas?

just confused that the guage doesnt go into the red?

 ??? ???

Title: Re:MK2 overheating?
Post by: golfvr6 on 26 November 2003, 17:05

Is the coolant boiling up? ,  if not then just an electrical fault.

Title: Re:MK2 overheating?
Post by: ASH on 26 November 2003, 17:23

what temp is too much, is 124  on the mfa ok, or should i relly on the mechanical guage?

Title: Re:MK2 overheating?
Post by: golfvr6 on 26 November 2003, 17:26

The mfa shows oil temp, the dial shows coolant temp. 124 does sound quite high for oil. Does it always go up that high?

Title: Re:MK2 overheating?
Post by: Mars Attacks on 26 November 2003, 17:26

i thought that the light flashes on the water temp gauge when the coolant level is too low. It may be worth checking your level when the car has cooled down one morning.

Title: Re:MK2 overheating?
Post by: golfvr6 on 26 November 2003, 17:28

Yep, it also comes on when the temp hits the top.

Title: Re:MK2 overheating?
Post by: ASH on 26 November 2003, 17:51

but the guage reads ok?

Title: Re:MK2 overheating?
Post by: ASH on 26 November 2003, 18:28

Doh! the MFA shows the oil temp not the water temp.

still no idea why the light flashes.

Title: Re:MK2 overheating?
Post by: Blue MK2 on 26 November 2003, 18:48

Tried topping up the levels, checking for leaks?

Title: Re:MK2 overheating?
Post by: ASH on 26 November 2003, 21:10

i'll try topping it up.  :)

Title: Re:MK2 overheating?
Post by: Blue MK2 on 26 November 2003, 21:15

wat light comes on again?

Title: Re:MK2 overheating?
Post by: ASH on 27 November 2003, 17:43

topped it up and it still flashes on and off, after about 7 miles?

its the water coolant light next to the battery light.


really starting to annoy me know! :(

Title: Re:MK2 overheating?
Post by: sKrEwBaLL on 28 November 2003, 12:44

Mine was doing this, I had to overfill the coolant to stop it flashing.  I think I filled it until the expansion tank was about half full

Title: Re:MK2 overheating?
Post by: golfvr6 on 28 November 2003, 13:44

Check the warning switch on the coolant tank with a multimeter.

Title: Re:MK2 overheating?
Post by: ASH on 28 November 2003, 19:37

ok, could be corroded couldn't it?

Title: Re:MK2 overheating?
Post by: golfvr6 on 28 November 2003, 23:56

Yep , try changing the tank over if you can get a cheap one, or just test the switch for resistance.

Title: Re:MK2 overheating?
Post by: ASH on 30 November 2003, 09:26

for the mean time do you think i should just go by the guage and ignore the light?

Title: Re:MK2 overheating?
Post by: golfvr6 on 30 November 2003, 09:36

If the coolant isn't boiling up then i wouldn't worry.

Title: Re:MK2 overheating?
Post by: modulater on 01 December 2003, 01:37

Quote from: golfvr6 on 28 November 2003, 23:56

Yep , try changing the tank over if you can get a cheap one, or just test the switch for resistance.

an even easier answer and one you seem to have failed to try is to remove the sender wire from the coolant expansion tank and just bridge the terminals with wire or a paperclip.

does the light still flash?

Title: Re:MK2 overheating?
Post by: ASH on 01 December 2003, 23:57

sorry bit thick, bridge them on the plug, and the light should come on and stay on?

Title: Re:MK2 overheating?
Post by: Blue MK2 on 02 December 2003, 00:10

Im thinking the light should turn off when you try that trick?

If the light does stay on or off by trying that trick then the circuit is okay.