Hello. This is my first ever post. My boiler is just over 5 years old and started losing pressure a few days ago (daily drop of approx 0.5 bar). A Gas Safe Engineer carried out a full service. EV needed to be re pressurised and he said that all was well. A few hours later pressure dropped again.Called him. Followeing his advice was :
1. PRV - tied a bag over to see if there was any water collected. None
2. Condenser pip was bone dry.
3. No obvious radiator leaks or towel rail leaks. (7 rads + 2 towel rails)
4. No Air lock in the system - I bled all the rads
5. No visible leaks in or around the boiler.
6. Isolated the boiler (and switched it off) for 24 hours to see if the pressure dropped. IT HAD (1.5 to 1.0bar)
Can someone please explain where the water might be going?
1. PRV - tied a bag over to see if there was any water collected. None
2. Condenser pip was bone dry.
3. No obvious radiator leaks or towel rail leaks. (7 rads + 2 towel rails)
4. No Air lock in the system - I bled all the rads
5. No visible leaks in or around the boiler.
6. Isolated the boiler (and switched it off) for 24 hours to see if the pressure dropped. IT HAD (1.5 to 1.0bar)
Can someone please explain where the water might be going?