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My Father in law has a fault with his Greenstar Condensing HE Combi. The pilot light cuts out after 15 seconds. The Heat exchanger can be heard filling with water , but trickeling as though its not under pressure. The pressure Gauge shows in the green at 3 Bar. The display reed Fault code E4...

Thanks for all your comments

so people tell me but as i said,this siemans one has lasted 6.5 years & its easy for me just to change the head than to drain the system down to change the complete valve.

Just done some research online & found this http://www.heatingcontrolsonline.co.uk/siemens-landis-staefa-rmh-motor-p-46.html Just what i need!

Yes it has a C on the end,after the numbers. I asked at my local plumbing suppliers & they said they didnt reconise the part no. i quoted (MA-V322C) mind you its 6.5 years old! They also said they didnt no if the head was changeable.If i change valve i"ll go for the drayton as its cheaper than...

Hi all.Im new to the forum & this is my 1st post.I have the Siemens MA-V322C 3port diverter valve with mid position,which is not working properly.Can i just change the head or will i have to replace the whole valve? If i have to replace,i was thinking of the Honeywell V4073A. Will the valve...