AC Compressor Running But Not Cooling? How to Test If It’s Actually Pumping ?

AC compressor running but the system is still not cooling properly? Before replacing the compressor, you need to prove whether it is actually pumping refrigerant effectively. In this HVAC technician training video, we examine how to diagnose poor compressor performance using the complete system picture — including suction pressure, discharge pressure, pressure differential, compression ratio, compressor current, airflow, temperature measurements, and possible refrigeration faults that can mimic compressor failure. You will learn why a running compressor does not automatically mean a healthy compressor, how low pressure differential can indicate poor compression, why compressor amperage can provide an important clue, and why airflow, refrigerant charge, restrictions, metering devices, safeties, and reversing-valve problems must also be considered. This training is designed for HVAC technicians, apprentices, service engineers, maintenance technicians, and anyone who wants to improve real-world air-conditioning troubleshooting skills. Always follow the equipment manufacturer's service information and applicable safety procedures when performing electrical or refrigerant-side diagnostics. #HVAC #HVACTechnician #HVACTroubleshooting #ACCompressor #HVACTraining