P1XU - Fault Codes / Diagnostic Codes

York Gas Furnaces: P1XU

Re: Lockout Codes

This York gas furnace has a control board inside the furnace blower compartment that will flash a diagnostic code that shows the operating status of the furnace.

Diagnostic Codes:
ON Replace Control
2 Red Pressure switch stuck closed
  • Bad pressure switch
  • Inducer fan relay stuck on
3 Red Pressure switch stuck open
  • Bad pressure switch
  • Bad inducer fan
  • Bad inducer fan relay
  • Restricted vent/intake
  • Condensate drainage issue
4 Red Limit switch open
  • Bad limit
  • Low airflow
  • Over-Fired
6 Red Pressure switch opened 4 times
  • Bad pressure switch
  • Bad inducer fan
  • Restricted vent/intake
  • Condensate drain issue
7 Red Ignition lockout due to 3 retries
  • Bad igniter
  • Dirty flame sensor
  • No gas flow
8 Red Flame signal lost 5 times
  • Dirty flame sensor
  • Combustion air problem

Article ID: 437
Last updated: 24 Nov, 2017
Revision: 1
Equipment -> Gas Furnaces -> York -> P1XU -> P1XU - Fault Codes / Diagnostic Codes
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