Air Conditioning Compressor Pump Guide

air con compressor

air con compressor

When you are looking to buy an air con compressor pump to replace your old one it is important to match up the part numbers to be sure it’s the correct one for your car. Get it right the first time – You do not want to purchase the wrong one and then go though the process of finding the correct one all over again.

At Your Car Spares LtdĀ  – What we test and look for!!!!

In order to test an air con compressor pump you need to be able to see the pump which can found in the engine bay. The first thing you need to check is that it isn’t leaking gas. The colour of the gas is dependent on which type of gas your compressor uses so you will need to find that information out. Then you need to turn the heaters onto the coolest setting and maximum speed then look to see if your air con compressor pump’s clutch is spinning , if it isn’t spinning then this means the clutch from your air con compressor isn’t engaging. If the clutch isn’t engaging you can check to see if it’s receiving any voltage by using a voltmeter or a multimeter and you should receive a reading of 12 Volts.

Where to find the Part Number

The part number is usually found on the side of the air con compressor pump but you may also have a part number on the clutch. Below we will show you where to find the part numbers. Some air con compressors will have a model number rather than a part number.

AC compressor

Where to find the air con compressor serial number

Serial code location for an air

Close up of a Sigma A/C compressor serial code

Sigma unit

How a Air Con Compressor works?

The air con pump is responsible for purifying the air in the car by cooling it down as well as reducing the humidity of it , the same way an air con system in buildings work. The air con pump is powered by the flywheel with a clutch that controls it. The pump brings in refrigerant gas and compresses it at such a high pressure it causes it to heat up. This heated gas is removed by sending it through the pipes and into the condenser at the front of the car which will then convert this gas into liquid from the cold air that’s passing through it.

Next the liquid will pass through a reservoir which will dry it causing it to purify by removing moisture. Then it will be sent to the heat exchanger through another set of small pipes. The liquid will be extremely cold and will need heating and this is the responsibility of the heat exchanger. It heats up the liquid by sending warm gas over it before it’s taken by the air con compressor pump. This a cycle so once it’s reached the heat exchanger and pumped into the cabin of the car the air con pump will bring in more gas from the heat exchanger andĀ  the cycle will start once again.

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