these two part numbers refer to the same physical component and are interchangeable

This genuine OEM temperature limit switch serves as a direct replacement for the obsolete Lochinvar TST30009

a 3-way solenoid assembly should be installed

providing reliable performance in residential and light commercial HVAC systems

flame-retardant plastic enclosure

Reznor 262337 Timer 322838-754 these two part numbers referThe Reznor 262337 Timer is a precision engineered 24VAC time delay relay designed to handle rigorous cycling in commercial and industrial HVACR environments. Built for a 10Amp resistive load, this 10 second delay timer ensures consistent operational sequencing, preventing short cycling and protecting sensitive downstream components from rapid voltage fluctuations and inrush current. As a veteran grade OEM replacement part, it is compatible with a