Resideo ST9120U1011 Fan Timer Freon What is the difference between

What is the difference between J991MDA-2 and J991MDA-2H

Key Benefits OEM Precision Calibration: Specifically designed with a 145-degree trip point and 105-degree reset to meet exact Nordyne furnace specifications

Precision Engineering: Manufactured from high-grade

supporting overall system longevity and operational safety

Resideo ST9120U1011 Fan Timer Freon What is the difference betweenThe Resideo ST9120U1011 is a universal electronic fan timer engineered to serve as a comprehensive control solution for gas warm air appliances. This furnace fan timer board integrates the management of combustion blowers and circulating fan operations into a single robust platform. Designed for field flexibility, it features DIP switch selectable delay settings that allow for precise timing adjustments. Specifically, the ST9120U1011 provides