Frigidaire Limit Trip or Flame Loss Shortly After Ignition

Furnace starts but shuts down after 30–60 seconds, blower may or may not start

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 flame sensor, Blocked heat exchanger or vent, Weak inducer draft, Faulty high limit switch

Safety: Turn off power and gas if you suspect vent blockage or combustion issues.

1. Clean flame sensor: This is a common cause of early shutdown. Clean as described in other entries.
2. Filter and vents: Replace filter and ensure vents are open.
3. Check vent terminations: Inspect outside intake and exhaust for obstructions.
4. Professional service: If the furnace continues to shut down, have a technician check draft, heat exchanger, and safety switches.

Medium 3/5

High Limit Switch

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