2.4 Alphard , heater stopped working

[Notabongo]

Had radiator leak for a while 2 months ago heater not blowing hot air ,seems to be loss of pressure when taking radiator cap off ,running ok seems leak has stopped since weather turned cold plus a bottle of kseal !!! ....any ideas have I gummed something up or caused a blockage somewhere? All help appreciated 

TIA

[Rojie]

1 hour ago, Notabongo said:

Had radiator leak for a while 2 months ago heater not blowing hot air ,seems to be loss of pressure when taking radiator cap off ,running ok seems leak has stopped since weather turned cold plus a bottle of kseal !!! ....any ideas have I gummed something up or caused a blockage somewhere? All help appreciated 

TIA

 

 

You may need to bleed air out of the cooling system.

 

There is a method buried somewhere in this forum.

 

Or possibly the heater flap valve is faulty, again covered n the forum.

 

Is your thermostat stuck open ?

[Notabongo]

Thermostat is kicking in fine 

[BigNev]

Check your coolant level in the radiator!

[Notabongo]

Level fine in radiator and expansion tank ,

[Notabongo]

No real pressure in the coolant system can open rad cap after a run and no bubbling or excessively hot so don't know if thats another issue or connected 

[MonsterS]

Here's how I bleed the system, Put the front end of the vehicle facing uphill, run the engine so the temp gets up, (with rad cap off).
then keep squeezing the top rad pip and run the internal heating on full blast (hot as you can) on intake not circular, and eventually the air lock will go.

[Notabongo]

Tried that monster but without raising the front end