Heating

Brand

U.S.Boiler Company

U.S.Boiler Company

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Type:

Alpine ALP105B

Alpine ALP105B

Error code:

18
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Error code: 18

Cause of error code 18

Light off rate proving failed
Blower is not running at Light-off rate when it should or blower speed signal not being detected by Sage2.2.

Solution for error code 18

• Loose connection in 120 VAC blower wiring.
• Loose or miswired blower speed harness.
• Defective blower

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