This SKU typically includes the main aluminized steel cell assembly

persistent flame rectification issues

or a complete lockout with diagnostic codes indicating a gas valve relay failure

The ECO is designed to detect over-temperature conditions and to open

Designed specifically for building automation systems

Mitsubishi Electric E228L4450 Control PC Board 326070-701 This SKU typically includes theThe Mitsubishi Electric E228L4450 Control PC Board is a critical OEM replacement part engineered for high precision regulation within specific Mitsubishi Electric HVAC systems. This PCB control board functions as the primary logic center, managing voltage regulation, compressor communication, and thermistor inputs to maintain peak operational efficiency. As a direct cross reference for E22E63450, the E228L4450 ensures full circuit board compatibility