About this episode

Gary McCreadie discusses diagnosing oil return problems in HVAC systems to prevent compressor damage.

Episode Overview In this episode of the HVAC Know It All Podcast, Host Gary McCreadie Director of Player Development and Head Coach at Shelburne Soccer Club and President of McCreadie HVAC & Refrigeration Services and HVAC Know It All Inc , examines compressor oil return, including why lubrication matters, how low load and reduced airflow affect oil movement, and how oil separators can protect compressors. Listeners will learn how to investigate oil-failure alarms, improve return velocity, and avoid replacing controls before finding the underlying system issue. Drawing on a past five-story rooftop-unit service case and observations from LG VRF training, the host explains how improper building automation programming contributed to repeated compressor failures. That field perspective connects oil separators, inverter oil-return modes, suction piping, traps, double suction risers, and compressor unloading to practical troubleshooting decisions. Key Takeaways Why inadequate lubrication can cause compressor seizure, metal debris, and component damage. How an oil separator can return oil from the discharge line to the suction line without circulating as much oil through the system. How…

People in this episode

Host: Gary McCreadie

Topics covered

• compressor oil return
• lubrication
• troubleshooting
• HVAC systems
• oil separators
• building automation

Keywords

• compressor

Mentioned in this episode

Organizations: Shelburne Soccer Club, McCreadie HVAC & Refrigeration Services, HVAC Know It All Inc, LG

Products: VRF

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