resettable immersion heater

[steve94]

Dear All,
i hope someone can help me .Ive just installed a new immersion heater,works fine the only problem is after it has heated the water it will not heat up again untill i reset it.Iam sure ive wired it correctly,but any information would be appreciated.Its a dual element top entry
kind regards steve

 

[JohnD]

what's the thermostat set to? Turn it down a bit.

 

[steve94]

Dear John,
at the moment its set to 70c
i have turned it down to its lowest setting which is 50c and it still has to be reset
kind regards steve

 

[JohnD]

H'mmmm.

Does the water coming out of the taps seem unusually hot?

I presume it is the Overheat cutout that trips.

p.s. if you can post a pic of the top of the heater showing the wiring connections, that might help.

 

[steve94]

Dear John,
thanks for replying, the immersion as i said is dual element,but the switch is a single fused type, could it be that i need to get a switch where you can choose to heat the water for a sink or bath
kind regards steve

 

[JohnD]

Some dual element immersion heaters have a switch on the top; some need a 2-way sink/bath switch.

Where is the thing you are resetting?

Does the immersion heater circuit have a dedicated 15A or 16A fuse or MCB in the consumer unit/fusebox?

 

[steve94]

Dear John,
the circuit has its own 20A fuse and the reset which is a tiny button (you have to use a nail) is on top of the thermostat.
steve

 

[JohnD]

Are both elements running at the same time?

Did you answer my question about the heat of the water?

 

[steve94]

Dear John,
the water is normally heated by an AGA which gets very hot, the immersion is hot but not unbearable
steve

 

[JohnD]

Are both elements running at the same time?

 

[steve94]

Dear John,
im not sure ,but as there is no switch to choose between sink or bath, i would assume that they probably are,but i cannot see how to wire it any differently
steve

 

[Steve]

stop saying Dear John!!!!

 

[steve94]

hahahahahah

 

[steve94]

john,
im off to to B and Q in a moment is it worth buying a switch where you can choose bath or sink ,could this be the problem
steve

 

[JohnD]

yes, buy a switch, and another metre of heat-resistant 1.5mm flex.