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Mend Saunier Duval F35E Boiler Pressure Valve

saunier duval f35e ?

my combi boiler keeps losing water through the presure release valvue, i have replaced this but it still keeps losing water. any advice please about the fault.

c croft
December 2008
your expansion vessel is low on air you can diy fix it with a foot pump connected to the expansion vessel on the back it's the red round tank like a tyre made of metal. there is a tyre valve on the expansion tank near the top & when the boiler is empty you add 1.3 bar of pressure... your boiler should now balance & not expand when heating & open the valve.

daniel07971456726
December 2008

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