Answer
Sep 29, 2025 - 07:03 AM
The blower should continue running for 60 to 120 seconds after the flame shuts off to help dissipate residual heat. If it stops immediately when the burner turns off, this often indicates a control board issue—especially if it previously operated as expected and suddenly changed. For your model, the correct control board is the 521099, which should resolve this problem.
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