Direct Replacement: Verified 18

a NEMA 4X rated or duct-mount probe would be required

High-Frequency Reliability: Engineered for 24V AC control circuits with stable performance across 50/60Hz frequencies

making it a staple for professional service trucks restoring ignition safety in residential and light commercial equipment

The Hydrotherm 62-3668 is commonly found in Hydrotherm HC series (HC-65D through HC-165D)

Resideo VC8110ZZ03 Actuator Freon Direct Replacement: Verified 18The Resideo VC8110ZZ03 Actuator is a 24V 2 position 2 wire factory replacement designed for high performance zone control in hydronic systems. Engineered for seamless compatibility with VC Series valves, including 1000 series 2 way and 6000 series 3 way bodies, this low volt actuator delivers a reliable 60 psi close off pressure. With its nominal 6 second timing and SPST control signal, it provides precise on off hydronic valve control for fan coils,