Article ID: 240
Last updated: 14 Dec, 2018
York Rooftop Units: DH, DM Re: Heat Control Board - Diagnostic Codes There are two control boards on this unit. The main unit controller mounted in the electrical control panel and the ignition control board mounted in the burner section. ► The main unit controller has one diagnostic (Code 9) to indicate a fault from the ignition control board. You must check the ignition control board for the actual fault condition.
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Article ID: 240
Last updated: 14 Dec, 2018
Revision: 5
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