300 TDi heater not blowing warm air

Hi I have a 1997 300 TDI and the heaters dont want to seem to warm up. any advise would be gratly welcome as winter is just around the courner

Many Thanks

Duncan

Air lock in the heater matrix maybe. Are you losing water anywhere? Could be a split pipe letting air out and water in ..

Lordsamuel said:

Hi I have a 1997 300 TDI and the heaters dont want to seem to warm up. any advise would be gratly welcome as winter is just around the courner

Many Thanks

Duncan

Click to expand...

Assuming everything else is in order the most likely cause of your lack of heat is an air lock, not an uncommon problem.
The best way to cure this is as follows.
Turn both heater knobs to full.
You now need to disconnect the heater flow pipe from the engine.
This pipe is the one that rises off the top of the head near the back.
Undo the jubilee clip and pull the heater hose off the connection to the head. Get some one to place their finger over the metal pipe end while you hold the rubber heater hose vertical and fill it from a jug with coolant.When full quickly reconnect rubber hose to head connection whilst coolant is coming out. Tighten jubilee clip and hopefully you should have a working heater.
If not , it's not air locked.
To avoid air locking problems it's always worth doing this proceedure after any disturbance of the cooling system eg fitting new thermostat etc.

Hope this helps.

Many Thanks for all your feed back I will give it a wirl..and report back
Many Thanks


Duncan