"An excellent unit supplied in a stout cardboard tube, the perfect length to replace an old 18” unit. The probe end was about 0.3mm thinner than the original 5/16” (7.9mm) imperial thermostat, probably to ease insertion.
The plastic head unit was slightly smaller than the original, so an easy fit. The only downside is the lack of any temperature scale markings, instead 7 graduations spread from '–' to '+'. Initially setting mine to 2 divisions below max (+) gave 50 degrees C. One division below max gave a more sensible 60 C.
As others have said, Screwfix’s wide opening hours are a boon if you need to remove the old thermostat to identify its length before heading off for a replacement the same day."
"Fitted in 2 minutes, just slide in to your existing 27" immersion heating element, connect your live and thermostat wires and all done.
Quite cheaply made, but then it's just 9.99, so what do you expect. Positive loud clicks give a clear indication it's working on first test.
Left setting as at factory, reckon this must be approx. 60C.
Would have been nice to have a graded temperature scale for adjustment rather than just '-' and '+' with no indication of actual temperature set. However, maximum is 70C, so coming down a quater turn should get a comfortable 60C.
"I was called to a friends house on a recently built property. Super hot water was coming out of all taps, Hot and Cold, a massive scalding risk and something which could be avoided by fitting one of these thermostats and a push button immersion heater timer.I cannot comment on reliability as I've only just fitted it."
"Works OK for about 6 months then the poor contact material starts to weld when it switches off so the water temperature slowly drifts up over time until the safety trip cuts the power, no good turning the temp down, once the contacts have welded a few times it's all downhill, I've found the same problem with the immersion heater timer relay contacts, I think that most electrical items switchgear, however much you pay for them are made in the same factory, far far away."