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how can i fix my sime format 80 ?

pressure keeps dropping to zero. have bled all rads, noair in system. pressurised system back up to 1.5 bar but pressure drops down within 5 mins to zero. no signs of any water leaks.

martin.
October 2008
have you checked the overpressure outlet outside?

mick
October 2008

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Mend Heating, Home Heating Systems
Mend repair fix Sime home heating systems