Heater not always warm

[keirv6]

Hi my heater dose not always blow hot,you can hear the water coming in then it blows warm and goes cold untill the next lot of hot water comes throw.Ihave tried to bleed the rad in the front but no air comes out.Is the heater matrix higher up than the rad?help please.

[WayneB]

Try jacking up the back of the car, turning the heater on and running the engine up with the rad cap off , until the coolant starts to expand and gushes out of the swirl pot. Then replace the cap.

[slade]

my heater is never warm. advantage of living in southern california, I have no desire to replace it.

out to drive in the 80 degree weather

slade

[keirv6]

Try jacking up the back of the car, turning the heater on and running the engine up with the rad cap off , until the coolant starts to expand and gushes out of the swirl pot. Then replace the cap.

<{POST_SNAPBACK}>

Thanks wayne b will try that

[Paul C]

Try jacking up the back of the car, turning the heater on and running the engine up with the rad cap off , until the coolant starts to expand and gushes out of the swirl pot. Then replace the cap.

<{POST_SNAPBACK}>

Hey wayne!

My heater is a bit hit and miss too. What does the above process actually do?

I 'assume' the tilt forces any airblock in the heater matrix/system out to the header tank? is that right?

Cheers.

[dazmans3]

Hi keirv

Well were do we start. Firstly can you tell me what year is your S3 Turbo is? Post about 85 versions had a modification to the cooling system (not sure if this does apply to the NA as well). Most cars I believe were sent to dealers to have fitted rather than being fitted at the factory. So it

[WayneB]

Hey wayne!

My heater is a bit hit and miss too. What does the above process actually do?

I 'assume' the tilt forces any airblock in the heater matrix/system out to the header tank? is that right?

Cheers. 

<{POST_SNAPBACK}>

Yes it helps rid the system of any trapped air

If that dont work see above post

[lwasson]

Hi my heater dose not always blow hot,you can hear the water coming in then it blows warm and goes cold untill the next lot of hot water comes throw.Ihave tried to bleed the rad in the front but no air comes out.Is the heater matrix higher up than the rad?help please.

<{POST_SNAPBACK}>

Hi Keirv

Did your heating problem ever get better?

If not check that your control knob is in the correct position. Over many years the knob set screw can become loose allowing the knob to slip. Under the dash are two vacuum switches. The switch that controls heat/AC is based on the position of a cam. If the knob has slipped then the cam will not be in the correct position. If the knob is slipping then the cam will be in the correct position only part of the time.

louis

'83 Turbo

[keirv6]

Hi tried what wayne b said and it made it better but not perfect will have a look again at the weekend