s11gec

Blocked of heater matrix. Now gauge drops when driving down hills. What is wrong with it. Please help.

More investigation work 2day. Checked water pump. Which is fine. Temp gauge only seems to drop when driving and using heaters on hot. If it's blowing cold gauge stays at halfway. Coolant pipe. Going to heater matrix is red hot but pipe coming out is cold. Could I have s blocked matrix?

Can it be faulty gauge if heaters go cold when gauge goes down. Could it be water pump impeller broken. ?

New temp sensor and genuine thermostat fitted 2day. Temp gauge goes up normal when idling. Heaters are red hot. Fan cuts in. As soon ad I start to drive temp gauge drops. This is getting annoying now. Am loosing my faith in vw. Please help.

Thanks for all your replies. Temp sensor came today. So will fit that 2moz. Will keep ya posted.

Have changed thermostat. Still the same. But didn't change the housing is that a must.

Hi. I'm having problems with temp gauge in my loop. It's 2001 sport. Takes ages to reach halfway, then when heaters are turned on gauge will drop to between 70-90c. If I drive down a hill gauge will go right down. Level is spot on so hopefully not leaking. If I take expansion bottle cap off there doesn't seem to be much pressure there. Idleing is fine and fan cuts in. Any help wud be great. Thanks