Hi all,
looking for some suggestions to try and understand why my system is losing pressure.
I have a system boiler serving an unvented hot water cylinder and central heating. Central heating circuit is set to 1 bar but drops to 0.8 every 1-2 days but doesn’t drop any further. central heating won’t kick in until I’ve refilled back to 1 bar. I’ve checked under the floor and the rads for leaks and can’t find any so struggling to understand where the pressure is going?
Could it be boiler related or expansion vessel perhaps?
I’ll undoubtedly call out a plumber, but I like to try and understand these things first.
images of system attached