the 61 series remains the industry standard for durability and straightforward mechanical cut-off performance without the complexity of electronic sensors

The P170DA-1 is designed for non-corrosive refrigerants only

Designed with a forged brass body and a nickel-plated stem

this Fenwal ignition module supports both local and remote flame sensing (RemSen)

As the direct replacement for the M9216-BGA-2YK

Lochinvar & A.O. Smith 100074696 Computer Board 322056-301 the 61 series remains theThe Lochinvar & A. O. Smith 100074696 Computer Board is a critical genuine OEM replacement part engineered for high efficiency tankless water heater control. Specifically utilized in Takagi T H3 DV and T H3 OS equivalent models, including the ATIO 540H series, this Computer Board 540 manages the modulation of the gas valve and fan speed to maintain precise discharge water temperatures. When troubleshooting water heater error codes such as the 101 or