Immersion heater/thermostat swap? Length critical?

[Fenlander]

My immersion heater thermostat has failed. The heater itself tests out OK at about 20 ohms so hopefully no drain down down reqd to replace that.

I dont know the length of my immersion heater but the thermostat measures 18" and the hole it goes in is 19" deep.

Looking online I can't see anywhere that would be open sat pm/sunday who stocks just the thermostat but will have a trawl round anyway as we need hot water.

Did wonder about buying a whole new immersion and just swapping the stat over... but they only seem to come in 11" & 27" (Wickes or Screwfix).

Is the stat length crucial... ie could I fit an 11" stat to replace my 18"?

Thanks.

 

[seco services]

I dont know the length of my immersion heater but the thermostat measures 18" and the hole it goes in is 19" deep.

probably a 27" immersion.
is it in the top of a standard hot water cylinder ?

Did wonder about buying a whole new immersion and just swapping the stat over... but they only seem to come in 11" & 27" (Wickes or Screwfix).

you can

Is the stat length crucial... ie could I fit an 11" stat to replace my 18"?

no fit the right length stat.

 

[Fenlander]

Yep its in the top of a 36" standard open vented cylinder with the green foam covering.

I absolutely have to sort this today hence limited to DIY type stores.

I see B&Q do a replacement stat for 27" immersions with the code number TSTAT18 so I wonder if this is an 18"?

 

[seco services]

yes its an 18" stat.
it's in the code T STAT 18.

 

[Fenlander]

That's great thanks... I'll nip out to B&Q and it will get us out of a hole.

Apreciate you replying.