38 NPS (National Pipe Straight) male thread

always verify the specific temperature stamped on the existing switch to ensure the opening point matches 145°F

600 BTU/hr when supplied with LP gas at a standard 11

or irregular flame patterns often indicate a blockage within the burner orifice that may require cleaning or replacement to restore proper combustion safety

ensuring that the root cause of the overheat—such as a failed blower motor

Marley Engineered Products 3301-2016-000 Knob 38 NPS (National Pipe Straight)The Marley Engineered Products 3301 2016 000 Knob is a direct OEM replacement part engineered for precise thermostat control across several commercial and residential heating lines. In the field, having the correct Marley heater replacement knob is critical for restoring system functionality without compromising the integrity of the thermostat stem. This specific control knob is built to interface seamlessly with the D shaped or splined shafts