81619066012 Auto AC Compressor Replace For MAN TGA Liebherr WXTK409

81619066012 Auto AC Compressor Replace For MAN TGA For Liebherr WXTK409

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Test car air conditioning compressor

1. Start by visually inspecting the compressor for any signs of damage or leakage.

2. Measure the voltage at the compressor's electrical connector using a multimeter to ensure it is receiving power.

3. Check the clutch engagement by turning on the air conditioning and observing if the compressor clutch engages and spins freely.

4. Use a manifold gauge set to check the high and low side pressures. Compare the readings to the manufacturer's specifications to determine if the compressor is functioning properly.

5. If all other tests indicate a fault with the compressor, it may need to be removed and taken to a qualified professional for further testing and repair.

Product pictures

4 steps to diagnose a car air conditioning compressor problem:

Step 1: Start the engine and turn on the A/C to the highest setting. This will activate the air conditioning compressor, which will draw refrigerant from the evaporator at low pressure, compress it, and send it to the condenser at high temperature and pressure.

Step 2: Listen for any unusual noises. Inspect the clamps, fixing points, hoses, and lines for breaks, cracks, missing nuts or bolts, and vibrations transmitted from the engine to the cabin. Check the belt, clamping device, tensioner pulleys, and clutch for wear, as they can cause unusual noises. If no obvious issues are found, consult a qualified technician to further diagnose the problem.

Step 3: Check for cool air coming from the air vents. Make sure the cooling fans operate when the air conditioner is on. Clean or replace the cabin air filter if necessary. Remove any debris, such as leaves, bugs, or dirt, that could obstruct airflow through the condenser.

Step 4: Inspect for visible leaks under the car. Look for any signs of refrigerant leakage, such as oily stains or puddles. If a leak is detected, it is recommended to seek professional assistance to properly diagnose and repair the issue.

Working principle for AC car compressor

In a closed AC system, the cooling of freon in the evaporator occurs due to a sharp change in pressure: liquid freon under high pressure passes through a narrow opening, atomizing and instantly cooling.

The task of the compressor is to pump refrigerant (freon) from the low-pressure circuit (from the condenser radiator) to the high-pressure circuit (to the evaporator radiator) with its simultaneous compression, which means an increase in temperature. In the condenser, the freon is cooled and turns into a liquid state, after which it enters the condenser again.

The AC compressor is sometimes referred to as the "heart" of the system, so its smooth operation is so important for the normal operation of the air conditioner. At the same time, the compressor is also heavily loaded.