You can never have enough...

[Praktica]

Yes thermostats always fail to be full on heat which is probably because you will always need to cook even if you have no heat control.

The ring thermostats may be faulty as well.  They also will fail to full on heat with no regulation except to be able to turn OFF.

Ages ago (30 years) they cost about $50 each and there is labour time cost on top of that from a registered electrician.

A very sad event happened to a member of my family centered around a stove in a granny flat connected to my parents house, not caused directly by the thermostats being faulty but by actions taken because they were not working properly but no one realized that;  Great Aunt Ediths (96 years old) seeming inability to boil an egg without boiling the pot dry was not due to oncoming failing mental abilities and/or her age, but that the heating rings were always on high because the thermostats were faulty.

When my mother and father went on holiday to the North Island from Chch they were so worried about her burning the place down as a possibility whilst she was on her own that they moved her into permanent hospital care where she eventually died quite quickly, she said to me it was so noisy there, and she was right.  When I went  to visit her she begged me to move her back to our home but I didn't know about the stove thermostat faults then, thought Mum knew what she was talking about, it was only later when I moved into the vacant flat I realized what had happened.  As an aside, I could always smell 4711 perfume on hot days even years later.

I never told Mum, she would have been so upset, she was always a worry wart.

Quite a horrible story really, unexpected and unbidden.

If anyone is interested it is the heating coil on a bi-metallic strip that fails and causes this fault of the thermostat to not control the heat by altering the time duty cycle.

Simmerstats are $25 each, $80 for 4 on Trademe - they are ones originally used on most NZ stoves. I replace the ones on our stove myself - they seem to last around 6 years.