NB & NCII V8 Fairlanes
Join Date: Feb 2001
Location: Bibra Lake Western Australia
Re: Fairlane heater - just a guess.....
The vacuum operated tap (below those hoses) has probably failed. it may appear to be working on the outside but the flap inside in probably stuck half closed with the operating leaver turning freely inside it. buy a new heater tap. It's a common problem and you will need to put the car up on ramps to change the tap and be prepared to be covered with a little coolant unless you are both quick and lucky.