Emersion Heater Thermostat

[ppppenguin]

The heater is a heavy load and possibly with high inrush current due to low-ish cold resistance but is it really inductive? In any case Nick's suggestion of a SSR solves the problem, and without the "clunk" of a relay that's tough enough for the job. It also solves the problem of the overheat emergency stat as I think the 2 sets of contacts are in series in the stat.