Heater valve making nocking noises..??

Post Wed Apr 16, 2014 5:03 pm

Hi.
Im having a problem with my heater.
The car gets up to temp perfectly and when driving normally the heater works,
But if i drive the car continuously over 3K revs ie on a motorway, the heater goes cold, and theres a tapping sound coming from my heater control valve.
Ive tried a different valve but to no avail..
Can anybody help me in fixing the problem...

Post Wed Apr 16, 2014 5:18 pm

The usual culprit of a tapping heater valve is having the heater hoses fitted the wrong way.... The hose from the head goes to the lower stub of the heater matrix.

Post Wed Apr 16, 2014 5:24 pm

Well that may well be the problem / solution ..
As the engine has been out....
Im hoping thats sorted it...

Just had a look ,, and yes your correct, the hoses are on the wrong way round...

A HUGE thanks to you..