when the boiler is running it is fine soon as it is turned off over night the boiler empties through the pressure valve i have changed the valve but get the same problem the boiler is 18 months old thank you the boiler is a ravenheat condencing dont no the model number

leonard burgess, January 2008

I have similar problem, I thought mine was dooing the same as yourse, when i filled preasure up in the morning and fired it up it was going past 3 bar and going out of the preasure relief valve,so when it cooled over night it was empty in the morning,spoke to engineer he said change the two thermisters ,one on each side half way up little screw in sender with two wire conecter on it .
hope this helps .

mark, April 2008

I have similar problem, I thought mine was dooing the same as yourse, when i filled preasure up in the morning and fired it up it was going past 3 bar and going out of the preasure relief valve,so when it cooled over night it was empty in the morning,spoke to engineer he said change the two thermisters ,one on each side half way up little screw in sender with two wire conecter on it .
hope this helps .

mark, April 2008