Rubbish Saunier Duval Thema F23E air lock in heat exchanger

[gav1nth0mas]

This is my first post so please be gentle. I have a rubbish saunier duval boiler that i cant really afford to replace at the moment, i have just replaced my AAV as it was leaking, but when i have re pressurised the system and started the boiler it runs for a few moments and shuts down taking the overtemp out, and i can hear a lot of air in the boiler somewhere. i have released the plastic cap on the new AAV, the manual says about bleeding any air out of the heat exchanger by undoing the air bleed cap. i cannot find such a cap anywhere, is there another way of bleeding this air out of the heat exchanger?

thanks for your help

Gavin

 

[mickyg]

turn the gas off and keep resetting the boiler, if its just air it will eventually shift it.

 

[rcoverson]

You should have a drain off above the boiler. Connect a hose pipe securley with a jubiles clip and open. if a gravity system leave to run for a bit if pesurised just open the taps> Dont forget to open any divertor valeves. three ports etc>

 

[rcoverson]

If you turn the gas of the boiler will just do nothing. Just run the water through for a boit