If the coil is showing signs of burn-out or electrical failure

or use both for multi-stage heating or cooling

simplifying the wiring of localized solenoid valves or alarm circuits

Common HVAC Contractor Questions:

Cleveland Controls AFS-951-1 Switch 30067439-890 If the coil is showingThe Cleveland Controls AFS 951 1 is a professional grade air pressure sensing switch engineered for high accuracy performance in industrial and commercial HVACR applications. Designed with a broad 0. 05" to 12" WC set point range, this SPDT differential pressure switch provides exceptional versatility for monitoring positive, negative, or differential pressure across blower coils, filters, and combustion air systems. Housed in a rugged NEMA 4