Hi, iv got a vaillant ecotec 28 boiler.
Problem I'm having is that it only seems to work when most of the rads are closed off.
Also the hot water temp is erratic.
The pressure sensor has been recently changed, the expansion tank has been checked and the filter in the hydro block checked by a gas certified friend.
It's showing up a f75 code when it crashs. I know this is a very common code on this boiler.
My mate is too busy to do any more on it and I just want to know what it could be before I start calling round engineers
Ta
Problem I'm having is that it only seems to work when most of the rads are closed off.
Also the hot water temp is erratic.
The pressure sensor has been recently changed, the expansion tank has been checked and the filter in the hydro block checked by a gas certified friend.
It's showing up a f75 code when it crashs. I know this is a very common code on this boiler.
My mate is too busy to do any more on it and I just want to know what it could be before I start calling round engineers
Ta