OEM Carrier Defrost Control Board HK32EA007 for Model PH4GEAB36000AA

This is the genuine OEM Carrier defrost control board (part number HK32EA007), factory-specified for the Carrier PH4GEAB36000AA heat pump. The defrost control board monitors outdoor coil temperature and initiates timed defrost cycles to prevent ice buildup on the evaporator coil. When this board fails, symptoms include a coil frozen solid with no defrost cycle initiating, the unit locking out on fault codes, erratic reversing valve behavior, or the system running in heating mode with rapidly declining output — all signs the board is no longer accurately reading or commanding the defrost sequence.

• Specs: OEM Part Number HK32EA007 | Also cross-references 1173636 & 1177927 | Carrier-factory-matched defrost timing logic | Designed for R-410A heat pump split systems
• OEM vs Generic: Genuine Carrier OEM boards ship with factory-calibrated defrost algorithms and connector layouts that match your unit exactly. Aftermarket boards may use generic timing intervals that cause under- or over-defrost, reducing efficiency and shortening compressor life.
• Install Difficulty: 3/5 — Shut off power at the disconnect and breaker before opening the control panel. Label or photograph all wiring connections before removal. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, a multimeter to verify 24V control signal. Follow your unit's wiring diagram carefully when reconnecting.
• Warranty: 1-year OEM manufacturer warranty. Orders placed before 3 PM local time ship same business day from our warehouse.

Compatibility: Engineered as the direct factory replacement for the Carrier PH4GEAB36000AA heat pump. Cross-references legacy board numbers 1173636 and 1177927. Always confirm the part number printed on your existing board before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us anytime.