mystery overheating, please help????
having a prob with my 2000 a3 1.8t sport
noticed my dash temp gauge wasnt reading so changed the sensor
and thermostat. Changing the thermostat i jost nearly all of the coolant, i filled it back up but now im having overheating problems
car rises to temp as normal but gauge sticks at 90oc as if showing a false reading, fans dont come on and if left will boil. Have done the aircon code 51 check and that sticks at 90 as well. noticed the bottom hose comeing from the thermostat going to the rad stays cool all the others are hot
had the water pump changed with the cam belt a few months ago
thinking probably an airlock but not sure why gauge or fans wont work
any help greatfully recieved