Noritz Gas Valve Feedback Error

Boiler displays error 93 and may lock out.

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

Incorrect gas valve feedback signal, Loose connector, Faulty gas valve electronics

Safety: Turn OFF gas and power before touching gas components.

1. Reseat gas valve connector: With power OFF, unplug and replug the gas valve connector to ensure good contact.
2. Inspect wiring: Look for damage to the harness between the gas valve and control board.
3. Do not adjust valve: Do not attempt to open or adjust the gas valve body.
4. Technician service: Persistent error 93 requires professional testing and likely replacement of the gas valve assembly.

Professional Required 5/5

Gas Valve Assembly

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