The Energy Cut-off Switch (ECO) is a water heater safety device that shuts off power if the water temperature exceeds a preset limit. It prevents dangerous overheating that can cause equipment damage, scalding risk, or even tank failure. When the ECO trips, it signals a problem that should be diagnosed before resetting.
/ˈɛnərdʒi kʌtˌɒf ˈswɪtʃ (ECO)/
The Energy Cut-off Switch (ECO) is a water heater safety device that shuts off power if the water temperature exceeds a preset limit. It prevents dangerous overheating that can cause equipment damage, scalding risk, or even tank failure. When the ECO trips, it signals a problem that should be diagnosed before resetting.
What does the ECO switch do on a water heater?
It shuts off power when water temperature gets too high, protecting the system and household safety.
Source: The Cooling Company
ECO trips when water temperature exceeds safe limits.
A homeowner finds their water heater off and learns the ECO tripped due to overheating. A technician identifies a faulty thermostat and restores safe operation.
Do not simply reset the ECO. Identify and fix the overheating cause first to avoid repeat trips and safety risks.
“Do not simply reset the ECO. Identify and fix the overheating cause first to avoid repeat trips and safety risks.”
ECO safety cutoffs became standard as water heater safety codes tightened to prevent overheating hazards.
Can I reset the ECO myself?
Some models allow it, but repeated trips mean a fault that should be fixed by a professional.
What causes an ECO to trip?
Usually a faulty thermostat, heating element, or wiring issue that allows overheating.
Is an ECO trip dangerous?
It indicates a safety issue. Stop using the heater and schedule service.
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