I have a wor/bosch combi it had a leak from a valve. Behind the electrics on the boiler. The valve had an orange knob. I tightened it up and the leak stopped but now the pressure keeps dropping. It goes from the red bar needle to zero in about 30 min. So now when we want hot water i have to open the pressure valve use the hot water and by that time the pressure has dropped again. We are doing this 5 or 6 times a day. Its a worcester/ bosch 240 RSF. Can anyone tell me what the problem is. What could have caused the leak and how do i maintain the pressure. e

LES HAYCOCK, November 2006

CHECK OUTSIDE ON THE WALL BEHIND THE BOILER, ITS POSSIBLE THE PRESSURE RELEIF VALVE IS FAULTY OR IF THE PRESSURE IS RISING FIRST THEN GOING DOWN YOU HAVE AN EXPANSION VESSELL PROBLEM

BG MIKE, November 2006