E19
American Water Heaters
Safety Circuit Open (ECO, Limit, Rollout Chain)
Electronic gas water heater shows E19; unit may not fire and may indicate a safety chain fault.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open ECO (energy cut-off) device, Tripped manual reset limit, Broken safety wiring, Faulty safety switch
How to Fix / Troubleshooting
Safety: Do not bypass safety devices. Turn off gas and power before inspection.
- 1. Visual inspection: Locate the series safety devices (ECO, high limit, rollout switch) and inspect wiring for breaks or loose connections.
- 2. Check continuity: With power off, test each safety device with a multimeter for continuity. Replace any device that is open and not resettable.
- 3. Reset manual devices: If a manual reset limit or rollout switch has tripped, investigate the cause (overheat, rollout) before pressing the reset button.
- 4. Correct root cause: Address overheating, blocked vents, or combustion issues that may have caused the safety to open.
- 5. Test operation: After replacing or resetting devices and correcting issues, restore power and gas and test the heater.
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Repair Difficulty
Hard
4/5
Required Part
Energy Cut-Off (ECO) and Safety Limit Switches
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