unstable water temperature gauge

[LEE69]

Yeah mine was too with no problems, luck of the draw i guess.

 

[CHRIS87]

having read this most people seem to have there them guage reading 90 mine constantly reads below 90 just on the left hand mark about 75 i would guess? is this wrong?

cheers chris

 

[Three Leons]

having read this most people seem to have there them guage reading 90 mine constantly reads below 90 just on the left hand mark about 75 i would guess? is this wrong?

cheers chris

Pretty sure the needle should sit constantly at 90 - it did on my old LC and on my current car until they both developed the same problem.

This is properly confusing! So if the gauge can only get a signal from the green top sender, and I've replaced that with a brand new OEM one - why would the gauge still be wandering? Struggling to see where the thermostat comes in .

And I'm assuming the climate control display gets the same signal as the one that's being sent to the ECU - which is a constant 90 so in theory the only problem I have is an annoying gauge.

 

[Three Leons]

A new twist

After paying a bit more attention to when the needle drops, I've noticed it's not just a random thing - it only drops when I'm going downhill

Now I could understand if the gauge was related to coolant level in the same way the fuel gauge changes depending on the road gradient - but as far as I know it's not!

Had no other problems so for the tme being I'm not too worried, just annoyed by not knowing what's going on!! Any ideas?

 

[Three Leons]

Anyone??

 

[LEE69]

Over cooling and not keeping to 90 I'd edge to the thermostat.

 

[Three Leons]

But why would the needle only drop going downhill? I wouldn't have thought a faulty thermostat would be so 'predictable' as it were

 

[LEE69]

Are you coasting when going down hill or using throttle?

 

[Three Leons]

Normally coasting (in gear) or very light throttle

 

[adam cupra 20vt]

My water temp gauge drops from 90 to about 65 when I boot it.........could this be faulty sensor as the incresed air flow wont make that much difference?

If so I replace with a green one?

 

[LEE69]

Normally coasting (in gear) or very light throttle

Yeah thermostat still gets my vote as it's not holding temp when coasting.
Easy enough to do

http://www.seatcupra.net/forums/showthread.php?t=210977&highlight=thermostat

My water temp gauge drops from 90 to about 65 when I boot it.........could this be faulty sensor as the incresed air flow wont make that much difference?

If so I replace with a green one?

Yeah replace with a green one.

 

[adam cupra 20vt]

Would you think a faulty sensor would cause those symptoms I have?

Just checking as I'm tight

 

[LEE69]

Yeah, suprised you have the black one still tbh.
Only about £10 of ebay mate, where i got mine from.

 

[adam cupra 20vt]

I not sure what colour it is mate I not even looked.

I'll get one off ebay in a min...sure I seen green ones on there pretty cheap

 

[adam cupra 20vt]

These the ones?

http://cgi.ebay.co.uk/SEAT-RANGE-DO...arts_Vehicles_CarParts_SM?hash=item27ac9d62fb

That says not 1.8T 4x4 so its ok for the normal 1.8t?

This ones even cheaper and is the same?

http://cgi.ebay.co.uk/Seat-Leon-Ibi...arts_Vehicles_CarParts_SM?hash=item5ad44b2d54

 

[adam cupra 20vt]

I hope its correct one as I just bought one

If anyones interested the 2nd one down is excatly same as the 1st but cheaper....

 

[LEE69]

Yeah a 4 pin one it is.

 

[Three Leons]

Yeah thermostat still gets my vote as it's not holding temp when coasting.
Easy enough to do

http://www.seatcupra.net/forums/showthread.php?t=210977&highlight=thermostat

Cheers. MOT's due in December so think think I'll hold out til then and get it done whilst it's in