Description
The Lennox 78H11 is a factory-specified defrost thermostat designed to deliver precise, dependable defrost cycle management in Lennox heat pump and refrigeration systems. Identified by its L70-35F rating, this thermostat opens the defrost circuit at 70°F and closes (resets) at 35°F, ensuring the defrost cycle initiates and terminates at the correct coil temperatures to prevent ice buildup and protect system efficiency.
Using a genuine OEM Lennox replacement part guarantees proper fit, function, and compatibility with the original equipment design — eliminating the guesswork and potential reliability issues associated with aftermarket alternatives.
Key Features
- OEM Lennox replacement defrost thermostat
- Opens at 70°F to initiate defrost cycle
- Closes (resets) at 35°F to terminate defrost cycle
- L70-35F rating for accurate coil temperature sensing
- Direct replacement for Lennox systems specifying part number 78H11
- Helps prevent coil icing and maintains system efficiency
Application
- Compatible with Lennox heat pump and refrigeration systems requiring the 78H11 defrost thermostat
- Designed for use in defrost control circuits where precise open/close temperature thresholds are critical
Why Choose a Genuine Lennox OEM Part?
Genuine OEM components are engineered and tested to meet Lennox’s exact performance and safety standards. Choosing the Lennox 78H11 ensures your system operates as designed, maintains warranty compliance where applicable, and reduces the risk of premature failure or improper defrost cycling.
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