OEM Lennox Humidifier Board — Y5018 (HE250 TrueEASE)
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The genuine OEM Lennox Y5018 control board powers the Lennox HE250 TrueEASE bypass humidifier, coordinating the water solenoid valve, fan operation, and humidistat inputs to maintain the target indoor humidity level throughout the heating season. This board is a direct factory replacement built to exact Lennox specifications for the HE250 TrueEASE platform.
Signs that the Y5018 board has failed include a humidifier that produces no moisture, a solenoid that won't open or won't shut off, no response to humidistat calls, or a completely dead control with no power. Intermittent operation and continuous water flow often indicate the board should be replaced.
OEM matters for reliable humidification. The Y5018 is engineered with the correct connector layout, solenoid drive circuit, and control logic for the HE250, which aftermarket boards frequently fail to match — leading to water waste, erratic cycling, or no operation at all. Choosing the factory Y5018 ensures proper fit, accurate humidity control, and long-term compatibility with your Lennox TrueEASE humidifier.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days