OEM Carrier High Pressure Switch 448/327 PSI for Model TFACCY50DK480415

This is the genuine OEM Carrier high pressure switch (part number HK02ZA442), factory-specified for the Carrier TFACCY50DK480415 commercial packaged unit. The high pressure switch is a critical refrigerant-circuit safety device that monitors refrigerant pressure on the high side of the system. When discharge pressure exceeds the safe threshold, the switch opens the control circuit and shuts the system down to prevent compressor damage, refrigerant leaks, or catastrophic equipment failure. When the high pressure switch fails or trips, you'll typically see symptoms such as nuisance high-pressure lockouts, an unresponsive compressor, or a system that short-cycles and won't hold a call for cooling.

• Specs: Opens at 448 PSI | Closes at 327 PSI | High-pressure refrigerant-circuit safety switch | Replaces superseded part HK02ZA439
• OEM vs Generic: This is a genuine Carrier factory part engineered to exact pressure setpoints. Aftermarket substitutes often carry wider tolerances, risking false trips or — more dangerously — late shutdowns that allow damaging over-pressure conditions.
• Install difficulty: 3/5 — Refrigerant-side work. A licensed HVAC technician should perform this repair. The system must be recovered before accessing the high-side port. Tools needed: manifold gauge set, recovery machine, refrigerant scale, adjustable wrench, multimeter for continuity verification post-install.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier TFACCY50DK480415 commercial packaged unit. Verify your unit's data plate and existing switch PSI ratings before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.