Yep you were spot on col77 - it was indeed a split split diaphragm in the diverter valve - although the split was tiny but apparently enough to destablise the pressures on either side. Total cost £122 (inc parts) :cry: - I'll have a go myself next time.
Hi, can someone offer some advice please...
I have the above boiler and recently it's started playing up. The heating works fine but now when I turn the taps on the boiler doesn't immediately fire up. It varies between taps with different pressure too eg the tap downstairs in the kitchen...
Hi, can someone offer some adviuce please...
I have the above boiler and recently it's started playing up. The heating works fine but now when I turn the taps on the boiler doesn't immediately fire up. It varies between taps with different pressure too eg the tap downstairs in the kitchen...