HVAC, Refrigeration & Compressor Technical Resources
The first time I worked on an inverter split air conditioner with an SNB172FEKMT compressor, the customer was convinced the compressor had failed because the cooling was weak during the hottest part of the afternoon. After checking the indoor unit, cleaning the condenser, measuring the refrigerant charge, and monitoring the inverter frequency, the compressor turned … Read more
There was a time when a small beverage cooler landed on my workbench because it wasn’t cooling properly. The owner thought the thermostat had failed, but after checking the electrical components and refrigerant pressure, the real culprit turned out to be the compressor. The original unit had worn out after years of continuous operation. After … Read more
I still remember the first time I came across an LG BSA090NJMV compressor. The refrigerator wasn’t cooling properly, and the owner assumed the compressor had completely failed. After checking the power supply, controller, and refrigerant pressures, I found the compressor was actually healthy. The real problem was a faulty inverter control board. LG Refrigerant Compressor … Read more
If you’ve ever stood in front of an old air conditioner trying to figure out its cooling capacity, you’re not alone. I still remember replacing a rooftop AC unit where the nameplate had faded so badly that only the BTU rating was readable. The customer kept asking, “Is this a 2-ton unit or a 3-ton … Read more
I still remember getting a call from a small grocery store owner whose display freezer had suddenly stopped cooling. It was the middle of summer, and every hour without refrigeration meant more spoiled products and unhappy customers. After checking the electrical components and refrigerant charge, it became clear that the compressor had reached the end … Read more
When I first replaced a failing compressor in a small commercial freezer, I made the mistake of focusing only on horsepower. On paper, everything looked right, but the refrigeration system still struggled to maintain temperature during busy afternoons. That experience taught me something every refrigeration technician eventually learns—the compressor model, refrigerant compatibility, operating conditions, and … Read more
I still remember getting a service call from a customer who complained that their 1.5-ton split air conditioner wasn’t cooling properly. They were convinced the refrigerant had leaked because the indoor unit was blowing warm air. After checking the pressure, cleaning the condenser, and testing the electrical components, the real issue turned out to be … Read more
A few summers ago, I got a service call from a customer whose 2-ton split air conditioner had suddenly stopped cooling. The indoor unit was running perfectly, but the outdoor unit made a loud humming noise before shutting off. Like many homeowners, they immediately thought the refrigerant had leaked. After checking the system with my … Read more
I remember the first time I worked on a split air conditioner equipped with an LG rotary compressor. The customer’s complaint was simple: the AC wasn’t cooling as effectively as before, especially during the hottest part of the afternoon. After checking the refrigerant charge, condenser coil, and electrical components, I found that the compressor was … Read more
There was a time when a customer called me because their older split air conditioner had stopped cooling during one of the hottest weeks of summer. The outdoor unit was running, but the air inside the room felt almost warm. After checking the electrical components, measuring refrigerant pressure, and listening carefully to the compressor, it … Read more