We have a Worcester-Bosch Greenstar Combi boiler that is 4 years old, including the central heating system. A year ago we noticed that the pressure in the system would drop by about 1 bar every couple of days.
During the warmer months, when the heating was off, the pressure loss was minimal – about 1 bar every 6-8 weeks.
When the cold weather set in a few weeks ago, the central heating was turned up, and the rapid pressure loss returned. We have had 3 visits this week from Worcester-Bosch engineers, one of whom fitted a new gas valve, but we now have a system that loses pressure at the rate of 1 bar every 2 hours. Each night, we top up the pressure to 2 bar, but each morning the pressure is at or near zero, and several of the radiators now make a continuous rushing sound. The radiators have all been bled as necessary.
The engineers have indicated that there may be a leak in the central heating pipework but are not 100% convinced themselves.
Could there still be a fault within the boiler, and how can we isolate the problem?
During the warmer months, when the heating was off, the pressure loss was minimal – about 1 bar every 6-8 weeks.
When the cold weather set in a few weeks ago, the central heating was turned up, and the rapid pressure loss returned. We have had 3 visits this week from Worcester-Bosch engineers, one of whom fitted a new gas valve, but we now have a system that loses pressure at the rate of 1 bar every 2 hours. Each night, we top up the pressure to 2 bar, but each morning the pressure is at or near zero, and several of the radiators now make a continuous rushing sound. The radiators have all been bled as necessary.
The engineers have indicated that there may be a leak in the central heating pipework but are not 100% convinced themselves.
Could there still be a fault within the boiler, and how can we isolate the problem?