Marey Intermittent Safety Trip / Control Lockout

Marey heater frequently locks out and requires manual reset even though no error code is displayed.

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

Marginal flame sensing, Unstable gas pressure, Overheating due to partial blockage, Faulty high-limit thermostat

Safety first: Repeated lockouts indicate a safety issue; do not bypass safety devices.

Steps:

Clean flame sensor: Lightly clean the flame rod with fine abrasive to improve flame detection.
Descale and clean: Descale the heat exchanger and clean inlet filters to prevent overheating.
Check ventilation: Ensure vent and intake are clear and properly installed.

When to call a technician: For gas pressure checks, high-limit testing, and control board diagnostics.

Hard 4/5

Flame Sensor or High-Limit Thermostat

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