Between black and blue, we measure 1. This will be cheaper than replacing the compressor itself. When the resistance between each lead wire are those listed in the specifications for your equipment the fan motor should be normal. Any of these wires can be checked, as long as you have checked the pairs and they have good resistance values between them. Because caring for your cooling unit can often be confusing, we'll show you how to test an air conditioner compressor in this article. On 2020-06-07 by Holly Hawk. Note: appearance of your Comment below may be delayed: if your comment contains an image, photograph, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. How to test a ac compressors. Freedoms just another word for nothing left to lose. The drier, cooler air is set outside the vent with a fan into your vehicle's interior. I have an AC manifold gauge.
If the resistance of your compressor is significantly higher than 30 ohms, there could be an overload problem. Pulled the relay and reinserted it. Insufficient oil in the compressor. 3Remove the electric access panel if you have one. The ideal oil pressure of a particular commercial compressor depends on its size, type, and its intended use.
Next, measure the electrical resistance of the windings by measuring each pair of wires, three pairs total. Remember to make sure that there isn't any power running to the unit or you'll shock yourself. For this reason, if a lug repair kit is used, it is crucial to seal the plug cover if you tried to use a repair kit, since there is no real seal. A system under the age of 10 that has been professionally maintained every year has a good chance of being covered under warranty. A compressor is a unidirectional pump that must have good compression with very little leak back showing that the rings are good as well as the reed valves are sealing. What do you guys think? Resistance Test: Perform an A/C clutch coil resistance test with an Ohmmeter. How to Test Car Ac Compressor with Multimeter - Guide 2023. Detach the power connector from the AC compressor clutch, place your positive multimeter probe on one of the connector terminals, and place the negative probe on your negative battery post. Iif you have trouble locating them, refer to your owner's manual. Testing a car compressor is essential for your HVAC system to work constantly. If the capacitor tells you "50 ±5%, " the acceptable range is 47.
The electrical failure leads to the AC clattering or rattling sound in the AC compressor. So, go ahead and replace the compressor. Air conditioning condenser unit fan diagnosis/repair. How to test an ac compressor on a car. Ironically, a majority of people don't pay attention to it until one of its most important components spoils and the whole system entirely stops functioning. You can also Troubleshoot the AC Compressor in the following ways: - Calculate the discharge pressures.
To reach the compressor, unscrew and remove the faceplates that block the access to the internal components of the AC. The same effect can be observed from simply connecting the meter to absolutely nothing. Take a picture of the wiring or note their location before removing the compressor wires. How to Test Your Car's AC Compressor. Once they are removed, pop out the access panel to reveal the unit's wiring. To better understand why, let's look at a burned-out compressor. I suggest that you give the service manager at your AC repair company a call and that you ask for clarification and if needed, ask for a visit from a senior, experienced HVAC technician.
When engine is on with throttle being held low side was 5 and high side was 115. It would help if you observed the voltage displayed on the multimeter. For accuracy, don't measure when the fan motor is hot, allow it to cool off. The car HVAC system brings a certain level of comfort for a lot of individuals during both hot and cold seasons. How To Test Car AC Compressor With Multimeter (IN 5 STEPS. If all good, flush the compressor out with the oil you intend to use, make sure it's drained then install it, also good to check the O-rings if a HPCO or relief valve is used plus a new gasket or O ring to installed it. Thermometer, gauges, and hoses.
Compressor clutch stocks and don't engage.