boiler runs when heating is calling as long as boiler is set on 3/4 or less but as soon as hot water is on the over heat stat pops the button underneath after a little while, can anyone help please .
system run all summer on hot water only ok, but after turning on heating it started popping button, have drained system and refilled with sentinel x800 drained after 4 days. replaced 3port valve as upstairs rads got hot during summer and cylinder stat replaced. pump seems to be working ok as all rads get hot.will this be one or more of the boiler stats
tim
January 2012
over gassed - burner pressure too high.
fud.
ginno
January 2012
Over gassed????? WTF, thats a new one!
Most likely the pump isn't actually pumping,
Bill
January 2012
could it be the overun stat as it has now started to shut down on heating aswell
tim
January 2012
turn the boiler down to 1 or 2 or replace the overheat stat. could be over gassed so test the gas valve is set to the correct prssure with a manometer.
ginno
January 2012
Faulty pump,or high limit temp start change temp start first
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