i was after some heat from the heater ( none , stone cold ) when i came across a vacume pipe off of what i assume is by pass valve put it back on result ice cold from heater vents ! took it off again result cold but not ice cold ! so took pipes off heater matrix flushed it with hose pipe back and foward result , wicked heater
all good! put vacume pipe back on result cold again
pipe back off heater good?
the vacume pipe in question goes through bulkhead where heater matrix pipes go, so can i assume heater by pass valve needs replacing? any help much appreciated , bob