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Common HVACR Questions:
Smith boiler parts configurations across multiple product generations
Humming often indicates debris between the armature and the coil
Direct Drop-in Replacement: Identical to AP13447-3 and AP19452
Robertshaw 5501-378 Infinite Switch Common HVACR Questions:The Robertshaw 5501 378 Infinite Switch is a heavy duty 240V infinite control switch designed for precision temperature management in electric ranges and commercial heating equipment. Engineered as a parallel circuit voltage sensing switch, this M series component offers proportional power control for resistive loads, making it a reliable direct replacement for 5501 378 and various OEM 5500 series models. As a veteran grade electric range infinite