The pump saga is not over!
After an apparent success in re-fitting the Shurflo 3.0 water pump and returning a defective one (that would not work at all) to the supplier, the pump has now started to behave in the same way as ot doi when ot emptied my water tank into the canal. To remind you: it will not turn off because the 3 bar relief valve on the calorifier is lifting. I have tried re-setting the adjustable pressure switch. I am now assuming that the re-set pressure of the relief valve may be considerable less than 3 bar!
One reason why this is particularly frustrating is because getting to the pump is not exactly simple.
First one opens the under sink cupboard door fully and removes the vegetable rack:
Then move the storage box in the other cupboard to the left
Swivel it and take that out
revealing the trap door floor hatch
Which is removed to reveal the pump
A radial gate
23 hours ago