Power max loosing pressure

[valleyboy999]

My IMI powermax keeps loosing its pressure, from 1.5bar - 0 in 12 hrs. I have checked all rads for leaks and there is nothing leaking through the ceiling. I have changed the pressure release valve but still the same. There is no hissing or water around the boiler. HELP...

 

[gazthepottertonengineer]

the waters got be going somewhere stick a pot under the overflow pipe to see if it fills up if it does its more than likely your expansion vessel causing the pressure to get too high and release the water outside

 

[valleyboy999]

Thanks what can be wrong with the expansion vessle?