Potterton Promax combi not working after re-pressurisation?

Hi, I had this problem I had to keep switching it on and off to get the boiler to kick in, im sure the guy come and changed the board, mine was still under warranty but it took alot of pushing to get it changed because everytime he come it would work ok, I'm now having problems with the pressure staying up it drops over night for not reason, now having the pressure value release something done. E119 is a pressure error, maybe you have air trapped in the system try bleeing rads for few days continually until your 100% sure no air trapped

Loopylou
November 2008