Anybody with an old Purex Tropic Isle model C180-C W pool/spa heater has probably had to change out the overtemp limit switch at some point. It looks like a 3" piece of copper tubing sticking out of a 1/4x1/8" NPT reducing bushing, with two wires sticking out the 1/8 end, with potting epoxy sealing the wires from water. Unfortunately, the copper corroded through and the water ate the wires from inside. There was a bimetal switch in a glass tube inside I might have been able to salvage, but I accidentally lopped the end off while cutting open the copper tube, losing the vacuum. So I'm going to have to see what I can rig as a substitute, since 3 different shops we tried were unable to locate one.

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last updated 2012-01-14 23:23:56. served from tektonic.jcomeau.com