Control indicates soft lockout, furnace pauses operation for a timed period then retries

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

Intermittent flame sensing, Marginal gas pressure, Draft issues, Dirty burners

How to Fix / Troubleshooting

Steps to check:

Clean flame sensor and burners: Remove and clean the flame sensor and burner assembly as described in other entries.
Check venting and intake: Ensure intake and exhaust pipes are clear and properly sloped to avoid condensate pooling.
Monitor operation: After cleaning, observe several cycles to confirm stable ignition and flame.

When to call a professional: If soft lockouts continue, a technician should measure flame signal, gas pressure, and draft to identify marginal conditions.

Repair Difficulty

Medium 3/5

Required Part

Burner Assembly

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