Electric Hot Water Heater Thermostat Replacement
Posted by C. B. on December 03, 19100 at 15:08:31:
I am attempting to replace a thermostat on a 240 V electric hot water heater (installing WH-9 model). The original thermostat was disconnected in my absence, and that person has no idea how the wires were connected from the power source to the thermostat. There is a black wire on the left upper screw of the thermostat, and red on the right upper screw. From the power source, I have black and white. Should the power source white (which I am assuming is neutral) be connected to the thermostat red and the two blacks connected, or is this incorrect?

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