Immersion heating not working

[MoonMan2]

Realised this topic is better in this thread.

Got an issue with this immersion heater again. It just stopped working, so I bought a new element but still no luck.

I checked the voltage at the connections of the element and it read 180V ac.

I then traced the immersion cable back 70cm or so to a switch in the same cupboard.

Untitled

• MoonMan2
• 6 Mar 2012
• 2

Untitled

• MoonMan2
• 6 Mar 2012
• 2

The black and red and the left read 242V ac, but the brown and blue on the right(with the switch on) read 180V ac.

help please?

just as I was about to directly connect mains with heater (bypassing switch as suggested by x4xr4 on plumbing thread) I noticed that where the mains is connected to the switch, ie red and black, the screw terminals read L out, N out. The screw terminals that connect to the heater read L in, N in.

Is this correct?

 

[EFLImpudence]

The wiring is not 'correct'.

It is the wrong way around but if there is no neon light on the switch
then it doesn't really matter.

If your readings are correct it would appear that the switch is burning out and the contacts are not making properly.

Fit a new switch (20A double pole) and if any of the wires have become brittle and charred cut back to fresh shiny copper before reconnecting.

 

[MoonMan2]

Right will get a 20A double pole from B&Q.

Notice they say LOAD and FEED.

Is FEED the mains and LOAD the immerser?

 

[EFLImpudence]

Is FEED the mains and LOAD the immerser?

Yes.

 

[MoonMan2]

Thanks for advice, new switch worked perfectly.

 

[EFLImpudence]

Good.

Thanks for letting us know.