Red water light constantly flashing

[ross b]

Water light has started constantly flashing on my 80 tdi, the water level is perfect and never drops, the heaters blow hot air, the temperature gauge never reads more than 70c or so. Ive checked the plug going onto the header tank and thats fine, replaced the temp sender and still no better, had the dash out cleaned all connections not that was anything to be seen there. has anyone any other ideas? starting to annoy me, reluctant to remove the bulb!

[Tonks4x4]

It may be the low level header tank switch itself and the contact are stuck.

Try unplugging the header tank sender and see if that cures it.

[ross b]

It may be the low level header tank switch itself and the contact are stuck.

Try unplugging the header tank sender and see if that cures it.

Dyou mean the plug coming off the bottom of the header tank? or should i be looking elsewhere?

[Tonks4x4]

Yes the plug coming off the header tank, remove the plug all together and see if you get the same fault

[Error404]

Try cleaning out the expansion tank with some strong degreaser... it will probably be full of crud and making the float stick

[ross b]

The plug was removed from header tank, cleaned up with contact cleaner and then bridged, i was told if the light stopped flashing then it was this at fault. It didnt stop the light flashing so just plugged back in but suppose could try clearing the tank out itself it does look rather clogged towards the bottom. Im thinking this could be a dreaded electrical fault however, although none of the wires ive traced from header tank plug and temp sender plug seem to be broke

[Tonks4x4]

If you bridge the wires that is turning the light on in effect. You need the plug unplugged and not bridged to test the float

[ross b]

just been out to check this again, with the plug removed the light remains flashing

[ross b]

might sound ridicukous but could this be fuse/relay related?

[newsh]

Could this be the MFTS? Mine has thrown a water symbol when the MFTS goes flakey. Not sure if it's the exact same symbol though.

You could try tapping the MFTS sensor with a long socket extension or similar to jog the internal connection.

[ross b]

MFTS never heard of it! what is it and where is it ?

[Biggss2]

Courtesy of Dave ''URS4Boy''

http://forums.quattroworld.com/s4s6/msgs/22584.phtml

[QuattroFever]

Brown plug, bottom of water manifold on the mfts get brittle and contacts dirty. If you pull off and push back on may proof a quick fix but ideally you'd want to take it off and maybe replace the hosting and pins...that's if that's what it is

[ross b]

I don't think these are found on the 1z's

[newsh]

Ah, sorry bud, I didn't realise I was in theDagdag section