What is the method for checking the refrigerant oil level?

[EleanorLee]

The method for checking the refrigerant oil level is: 1. Observe the sight glass to check the refrigerant oil. It is appropriate when the compressor's refrigerant oil level reaches 80% of the height of the sight glass; 2. Observe the oil dipstick to check the refrigerant oil, ensuring the oil level is between the upper and lower marks specified on the dipstick. The functions of refrigerant oil are: 1. Lubrication: It reduces friction and wear during compressor operation, thereby extending the compressor's service life; 2. Sealing: The refrigerant oil creates a seal between the piston and cylinder wall, as well as between rotating bearings, to prevent refrigerant leakage; 3. Cooling: While lubricating the moving parts of the compressor, the refrigerant oil carries away heat generated during operation, keeping the moving parts at lower temperatures, thus improving the compressor's efficiency and operational reliability; 4. Energy regulation: For refrigeration compressors equipped with energy regulation mechanisms, the oil pressure of the refrigerant oil can be used as the driving force for the energy regulation mechanism.

[PaisleyMarie]

I had an issue with my car's air conditioning before and learned how to check the refrigerant oil level. The method is to start the car and let the engine run for a few minutes, then turn on the AC to the lowest temperature and highest fan speed, letting it run for about 10 minutes. After that, look for a transparent sight glass in the engine compartment—its location varies by car. For example, my old car had a small round glass dot near the condenser. Check the refrigerant oil level through it; it should normally be between the high and low marks. If the level is too low or you see bubbles, it means there's insufficient oil or air has leaked into the system. Remember to do this in a well-lit area and be careful not to touch hot components. Low oil levels can accelerate compressor wear and increase repair costs. I’ve saved a lot of money by checking it promptly, and now I take a quick look every six months.

[JaylaMarie]

As a car enthusiast, I've been maintaining the air conditioning system myself for quite some time. The basic steps for checking the refrigerant oil are: start the car and turn on the AC, wait a few minutes for it to stabilize, then check the position in the sight glass. On most vehicles, the sight glass is located under the dashboard or at the rear of the engine compartment. You can see the oil level through that transparent glass to determine if it's within the indicator lines. If you notice low oil level or small bubbles emerging, it's likely a system leak and needs prompt replenishment. From experience, a compressor running low on oil is prone to burning out, so I make it a habit to check it once before summer as a preventive measure. When performing the check, avoid peak temperature hours, wear gloves for safety, and for more complex models, it's better to seek help from a professional shop.

[RosalieFitz]

From daily car use, I've learned a bit about maintenance. Checking the refrigerant oil level is quite simple: start the car and turn on the AC for a few minutes, then locate the small inspection window on the system to observe the oil level line. If it's normal, you're good; if it's low or has bubbles, it indicates potential risks. For first-time attempts, it's recommended to have someone guide you to prevent mistakes.