Glow worm betacom 30c. keeps over pressurizing when heating is on then from 1&1/4bar rises to 3bar and blows prv. hot water works fine. exp vessel is 1&1/2 bar pump spins but return is cool? all rads heat up fairly quickly. cleaned return filter.
i set the stat on the boiler to low and seems to work at low rate ok but rads dont get too hot.
anyone got any pointers cause i'm scratching me head. thanks https://www.************/images/emoji.php/v6/f57/1/16/1f609.png
no, the pressure drops when heating not on, its got no where to expand or the pumps not strong enough as the return pipes cold. all rads warm up though ?????
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