Worcester/Bosch 28 Si II - front water press guage dropping

[kwikfix328]

Hello Folks,

I have been doing a bit of Electrical work in my services cupboard which also houses my Worcester Bosch gas central heating boiler.

I've notice a few times now that the Water presure guage on the front of the unit is a bit low , the red pointer is preset to 2 bar, but i keep finding that the pressure has dropped to about 0.5 bar. I have some kind of top up loop water circuit and have re-pressurised it , but it still keeps dropping again.

The unit is 5½ years old and covered by a monthly warranty scheme ( Nationwide gas care iirc) , is it worth calling them out over this. The Heating & DHW all seem to be working fine...

 

[Kristoflampie]

Sounds like a leak, tho expansion vessel worth a check if pressure rises to 3 bar and over whilst operating, water will be dribbling out of the safety to outside if the vessel is faulty. If pressure reasonably steady whilst operating then check for leaks! Red pointer dont mean much , it can be moved to act as a guide, pressure should be about 1 to 1.5 bar