LWCO
Energy Kinetics
Low Water Cutoff Sensor or Wiring Fault
Control indicates LWCO; burner will not fire even though system appears full.
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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
Failed LWCO probe, Corroded LWCO wiring, Poor ground connection, Control board input fault
How to Fix / Troubleshooting
Safety: Turn off power before accessing the low water cutoff or control wiring.
- 1. Inspect LWCO wiring: Locate the low water cutoff on the Energy Kinetics boiler. Check that all spade connectors and wire nuts are tight and free of corrosion. Clean and resecure as needed.
- 2. Check probe (if probe-type): If accessible, remove the LWCO probe and inspect for heavy scale buildup. Light scale can sometimes be gently cleaned; if heavily corroded, the probe should be replaced.
- 3. Confirm proper grounding: Ensure the boiler and control panel are properly grounded, as LWCO circuits often rely on a good ground reference.
If the LWCO indication persists with proper water level and wiring intact, the LWCO control or Energy Manager input may require replacement by a technician.
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Repair Difficulty
Hard
4/5
Required Part
LWCO Probe / Control
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