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were do I get a diagram and information on airpressureswitch 105he?
gas neoon flashing?
how do i lower the water presure ?
30 degree / flame neon flashing?
pressure switch?
Spring pressure valve on an open vented system?
i?
water goes cold during shower?
central heating working but no hot water?
Cenral heating pump overrun?
no domestic hot water?
plumbing?