Adrian Brentnall wrote:
I'd rather not go the fully electronic route with a solid state relay
for the final device - I rather like things that go 'clunk' grin.

Dad used solid state relays on his kiln controller, instead of going
"clunk", the specialist fuses that protect the relays liked to go "fot"
unfortunately they were more expensive than the relays themselves.

I think he did eventually find a previous owner had incorrectly wired
the elements, and now it's reliable.