How to wire water heater thermostat

How to wire water heater thermostat Wiring diagrams for 2-thermostat residential water heater How to replace thermostat
			Wiring is same for 240 Volt residential water heaters (see more diagrams below) c Both elements are never 'on' at same time. Either upper element is 'on' or lower element is 'on,' or both are off. See how water heater worksc Top thermostat is main controller <> it turns on upper element until temperature is reached, and then sends power to lower thermostat. c Troubleshoot electric water heater Upper element burned out, bad thermostat, ECO tripped, appliance not receiving 240V, TP valve releasing water Thermostat reads temperature through wall of tank.

Diagram below explains ordinary residential water heater wiring

Screws identified by letter and number L1, L3, L4, T2, T4

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Diagram shows ordinary residental water heater wiring

Dia. 3 Shows a variation used by trained people to reach different objectives.
Illustration for information only <> Homeowners should not alter water heater wiring.
See insurance data on water heater failure