reefer24131

I have a 1988 z31 manual turbo uk spec. I put my heaters on yesterday and they cut out and then came back on and they were surging if that makes sense. it seemed like a bad earth so I pulled the plugs cleaned them and also cleaned the plug on the blower motor. I still have this problem. when it cuts out I have to slide the **** to 'off' and then back across to high and they will come back on.

im assuming the heater control panel/box is knackered can anyone confirm this?

thanks.

AZ-ZBum

I would suspect vacuum leaks first.

reefer24131

thanks for the reply.

so is it all vacuum controlled? I see the multi plug on the back of the heater control panel and assumed it would operate the fan blower speed by adjusting the voltage? where will I find the vacuum pipes, will the be under the dash or under the hood?

thanks.

AZ-ZBum

The blower motor speed is electronically controlled, but all the flaps are vacuum operated.

The lone vacuum line originates at the vacuum pump/tank at the front right of the car. At least, I believe it will still be front right even for you over there...