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home Fix label Heating label_important Home Heating Systems category Worcester Bosch

worcester bosch heatslave 20/25 pressure high and overflow active?

when hw and or ch is selected pressure rises past 3 bar and the overflow is active.
when turned off pressure reduces slightly but overflow still active.
all rads fully functional and hot.
smudge 5815, October 2010
home Fix label Heating label_important Home Heating Systems category Worcester Boschdone
Possibly overfilled, make sure the filling loop is turned off.
If the pressure rises significantlyon using HW/CH, it could be the expansion vessel needs re-charging/replacing.
If the 'overflow' continues to leak the prv has failed and will need replacing.

Carefree, October 2010
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