I’ve just moved in to a property I don’t have a big knowledge of plumbing at all I have a Vaillant Boiler when it’s in normal mode only 2 out of 3 radiators work but if I put it into service mode the one that doesn’t work then works help please ?
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May just need forcing through. Try the above And let us know what happensTurn the ones that work off does the one that doesn't heat up now ?
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