That's the magnet located inside the pipe just after the water valve in the Joven heater

It activates a reed switch on the circuit board to switch on the water pump/heater..

If there is low pressure or as the magnet ages it loses its ability to magnetise (activate) the reed switch which in turn won't switch on the Joven built in water pump/heater..

that magnet has to be replaced and it'll work as normal..

It's a common fault..

Get a bolt with same diameter as the hole and thread the bolt in then you can pull out the stopper

Then the magnet will drop out. Just make sure you put the new magnet in the same polarity or the magnetic switch won't work

After you replace the new magnet just use the same bolt to push in the stopper and unscrew

Just pay attention when the magnet drops and replace same orientation.

Worse case scenario if it doesn't work, just reorientate the magnet and test again.

Otherwise the fault is something else or just have to get a new water heater 😁😁😁😁

This post has been edited by Richard: Dec 24 2018, 09:51 PM

A bolt a threaded rod which has a six sided head as opposed to a screw which is also a threaded rod but with groove on head.

The defective magnet is in the plastic pipe while the magnetic sensor on the circuit board above that pipe.

So first unscrew the top circuit board before you can remove the plastic pipe piece holding the magnet.

Use a screw big enough to thread into the stopper in the plastic pipe then the magnet will fall out.

Just watch the correct position of the magnet because the new one needs to go in the same way.

This post has been edited by Richard: Jan 14 2019, 01:50 AM