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The HH19ZA155 is an automatic reset switch
Can I use an aftermarket L200-20F switch instead
Advanced Diagnostics: Features on-board LEDs that signal specific fault codes
The "blank" position indicates a frost protection setting of approximately 45°F
Designed specifically for R22
Lennox 10H67 Control Module R-407C The HH19ZA155 is an automaticThe Lennox 10H67 is a critical HVAC control module designed for high performance management of blower motors and ignition sequences in residential and commercial units. As a veteran grade OEM Lennox replacement part, this module serves as the primary interface for regulating airflow and temperature adjustments across specialized Lennox furnace models, including the GHR32 and GHR34 series. It functions as the system's electronic brain, facilitating