Combi Boiler problem!

[immyw]

Hi there,

I wonder if anyone can advise? The water pressure in my combi boiler keeps going too low, switching off and resetting itself to zero. It's happened three times in the last month. I keep increasing the pressure to 1.5 but something seems to be happening to make it decrease. I wonder if anyone might be able to suggest a way I can stop this happening without having to call out someone to fix it?

Many thanks!

 

[ianmcd]

what is the make and model of the boiler ?

 

[immyw]

It is a Valient EXO Max combi boiler. Thanks for your help!

 

[CBF]

leak or faulty prv, located the 15mm copper pipe going outside tape a bag over it if you get water in it then the prv is letting by, it either needs cleaning or more likely replacing