Kenmore Improper Combustion or Thermostat Sensing.

Kenmore gas water heater burner cycles on and off rapidly (short cycling).

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.

Possible Causes

Dirty burner, restricted flue, thermostat sensing bulb not properly positioned, oversized heater for demand, or a faulty gas control valve.

Safety: Turn the gas control to OFF and allow the unit to cool before servicing.

Clean burner and orifice: Remove the burner assembly and clean it with compressed air. Ensure all ports are clear.
Check flue: Inspect the flue for obstructions and proper draft. Correct any venting issues.
Thermostat sensing: Ensure the thermostat sensing element (on some models) is properly inserted into the well and making good contact.
Observe operation: After cleaning, relight the unit and observe burner operation. If short cycling persists, the gas control valve may be defective and should be replaced by a professional.

Hard 4/5

Gas Control Valve / Thermostat.

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