HEX: 15 - Combustion air fan blocked
Fault Details:
The combustion air fan is blocked.
Recommended Solution:
Inspect the fan motor visually and ensure it moves freely (do not apply force).
Check for snagging or jams in the combustion air intake fan wheel or hood.
Note: Fault code meanings can vary depending on the model and controller. If you’re unsure, contact Heatso directly.
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