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JHE Mitigation Board

Article ID: 791
Last updated: 8 Jul, 2026

York Air Handler: JHE

Re: Mitigation Control Boad - Status Codes / Fault Codes

This air handler uses an A2L refrigerant and requires a Mitigation Board and Refrigerant Sensor.

The table below describes the LED displays for status and fault codes.

A "lockout" can be Reset by cycling power to the air handler.


Status & Fault Codes:

LED1 Description
OFF No power to control
2sec On/Off Normal Operation
0.5sec On/Off Test mode
ON Control failure
2 Flash Refrigerant Detected
3 Flash Sensor Failure
4 Flash  Sensor lost communication
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Article ID: 791
Last updated: 8 Jul, 2026
Revision: 7
Access: Public
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