F16

Whirlpool Leak Sensor Activation / Fault

F16 error, hybrid water heater indicates leak detection or pan sensor fault (on models with leak sensor)

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.

Possible Causes

Water in drain pan contacting leak sensor, faulty or wet leak sensor, condensation dripping into pan, plumbing leak above heater

How to Fix / Troubleshooting

Safety first: Turn OFF power at the breaker and close the cold water supply valve to the heater.

Leak inspection:

Check the drain pan under the heater for standing water.
Inspect all visible plumbing connections above and around the heater (cold inlet, hot outlet, T&P valve, unions, flex connectors) for drips.
Dry the leak sensor and pan completely with towels or a wet/dry vacuum.

If a leak is found:

Repair or replace the leaking fitting, valve, or pipe before restoring power.
If the tank itself is leaking from the shell or bottom, the water heater must be replaced.

If no leak is found:

Check for condensate from cold water lines dripping into the pan and insulate pipes if needed.
Replace a faulty leak sensor if it continues to indicate water when dry.

Repair Difficulty

Medium 3/5

Required Part

Leak Detection Sensor

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