Key Benefits Durable Stainless Steel Construction: High-grade housing provides longevity and resistance to environmental stressors in commercial settings

Common indicators include the outdoor unit becoming a "block of ice

this HVAC thermocouple is designed to withstand the thermal stresses of continuous operation in residential and commercial heating equipment

Universal Range Compatibility: Replaces common part numbers including Southbend 1183200

Carrier HK61EA021 Circuit Board 322838-752 Key Benefits Durable Stainless SteelThe Carrier HK61EA021 Circuit Board is a critical OEM replacement control board designed for high performance management of residential furnace and heat pump systems. Built to handle complex HVAC sequencing, this module serves as the primary intelligence for your unit, regulating fan control, ignition timing, and safety circuit monitoring. For technicians in the field, the HK61EA021 provides reliable diagnostic troubleshooting via onboard LED