combi boiler loses pressure

[wmvej01]

My combi boilers loses pressure overnight and will not fire up inthe morning because of this. Any suggestions?

 

[gas4you]

Leak in the system, or prv letting water out.

 

[bengasman]

If the problem is caused by the prv, you may not see the water coming out. Stick a sandwich bag over the outlet and secure it with a rubber band. One second look in the morning will tell you all.

 

[kieren]

If the problem is caused by the prv, you may not see the water coming out. Stick a sandwich bag over the outlet and secure it with a rubber band. One second look in the morning will tell you all.

I too have this problem? Mine started because the previous owner had put a screw through the pipe which lead to a burst pipe when I was walking around on the bare floor boards. ever since I repaired the pipe though the pressure always seems to be very low and the pipe that leads outside always seems to drip ?

Is the release valve hard to replace ?