maintaining OEM performance standards without requiring field calibration

Broad Compatibility: Direct fit for McDonnell & Miller Series 21

the 12-E27120-000-04 is specifically designed for vertical mount applications

Common Technician Questions: What is the standard manifold pressure setting for this kit

Built with a Run-Ease oil change system

Carrier P283-9930 Start Relay 318973-401 maintaining OEM performance standards withoutThe Carrier P283 9930 Start Relay is a heavy duty OEM electrical component engineered for precise compressor management in high demand HVACR systems. As a veteran in the field, you know that a failing relay is often the culprit behind hard starting compressors or repetitive tripping of the internal overload. This unit is the direct replacement for the HN61HB540 and HN61HB530, providing a seamless retrofit into existing control boxes without the need