The 150-14 is for flat flange heads and has no holes

and RSA-85/135 boiler models

Designed to facilitate rapid mounting on a standard 35mm DIN rail

ensuring a precise fit in the burner assembly of compatible Heil Quaker heating systems

For field technicians performing annual maintenance or boiler repairs

Carrier HR54ZA003 Door Switch The 150-14 is for flatThe Carrier HR54ZA003 Door Switch is a critical OEM safety interlock designed to ensure secure blower compartment closure before system engagement. As the direct cross version of B4310407, this switch is engineered for high duty cycles in residential and commercial furnace repair and air handler applications. Rated at 20A 125VAC and 10A 250VAC with 3 4 HP capacity, it provides the robust electrical characteristics necessary to handle inductive loads