A while back my coolant temp gauge on the dash of my golf mk1 started acting a little funny.
Firstly the red light would flash for a couple of minutes and then go back off.
About a week later then the needle seemed to indicate the coolant was not at a high enough temperature.
And then the needle failed to give any reading at all.
I have checked the whole cooling system during this and everything was working properly.
Coolant levels were good, circulation was fine, water pump good, fan worded correclty. Everything seemed fine and the car was not overheating.
This led me to believe that is was a sender fault.
But before I sourced this I put in a new thermostat. (didn't help)
Just this weekend I put in a new sender after days of tracking down the part.
I was sure this was the problem. But there is still no reading.
Just to be safe I have since put in a new rad and rad fan & motor.
So what could it be??
Perhaps the gauge in the dash needs to be replaced?
And thoughts on this much appreciated.