Description
Lennox 85H75 Defrost Bimetal Control Board Overview
The Lennox 85H75 Defrost Bimetal Control Board is a precision-engineered OEM replacement component designed to manage and regulate the defrost cycle in Lennox heat pump systems. By accurately sensing outdoor coil temperature through its bimetal sensing element, this control board initiates and terminates defrost cycles at the correct intervals — protecting system efficiency, preventing coil icing, and extending the operational life of your heat pump.
Key Features
- OEM Lennox replacement defrost bimetal control board (SKU: 85H75)
- Bimetal sensing technology for accurate coil temperature detection
- Initiates and terminates defrost cycles to prevent outdoor coil ice buildup
- Helps maintain peak system efficiency during cold-weather operation
- Direct drop-in replacement for compatible Lennox heat pump models
- Manufactured to Lennox OEM specifications for reliable, long-term performance
Why Defrost Control Matters
In heat pump operation, the outdoor coil can accumulate frost and ice during cold, humid conditions. Without a properly functioning defrost control board, ice buildup restricts airflow and drastically reduces heating capacity. The Lennox 85H75 ensures the defrost cycle is triggered and terminated at the right times, keeping your system running efficiently and reliably throughout the heating season.
Application
- Designed for use in compatible Lennox heat pump systems
- Ideal for HVAC technicians performing defrost system diagnostics and repairs
- Suitable for residential and light commercial heat pump applications
Installation Notes
Always verify compatibility with your specific Lennox unit model number before installation. Disconnect all power to the system prior to replacing any control board. Consult the equipment service manual or a qualified HVAC technician for proper installation procedures.
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