Domestic Water Pump Problem

[David of Essex]

Hi
I have a Jonhson water pump fitted for supplying domestic hot and cold water. The pump has stopped working all of a sudden. Have checked electrical supply and I have 13v at the connector spades at pump. There is an accumalator fitted in the system as well. How does this system work please and can they be repaired.
David

 

[sarabande]

if you 'crack' open the outlet from the pump (with power to the pump, natch !) does the pump work ? If YES, then there's a blockage downstream in the system.

Do you have any valves which could have been turned off ? Has the pipework been squashed hard ?

If NO, then the chances are that the pump motor has gone to the great pressure relief ground in the sky. I suppose you could take the pump out and bench test it to see if the motor works at all (it won't hurt to run it dry for a few seconds), but they do have a finite life.

Jabsco has a good site, with loads of exploded diagrams to show how they work, and also a fault finding chart e.g.
http://jabsco.com/products/marine/w...umps/par_max_19_and_29_31x95/iid_29/index.htm

BTW, have you checked the earth for good connectivity; the fuse or RCD for continuity ?