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Replaced this water ehater with a new one Saturday evening. I used my torch to heat the thermocouple with my test meter set to the millivolt setting. Atttached the alligator clips,one to the copper and one to the point of connection as the picture shows. The thermocouples maximum output was 27mv.
Thanks. That's good info. I have a little device I screw onto the thermocouple. If the thermocouple doesn't hold the plunger down while being heated it's bad. I like your way better.
I was thinking the same thing, never needed to test one and never will. With the new controls now it's pointless. If someone really wants to keep their old W/H then I'll replace the thermocouple to see if it works just like I have for years.