SOURCE: Air conditioning not cool
The charging port is in the larger of the 2 AC lines from the AC compressor on the engine, it will be near to or in the round cannister (called an Accumulator) that larger AC line goes near the firewall at the back of the engine bay.
SOURCE: how to trouble shoot air condition compresuer
You really want to troubleshoot your AC. Here are some items to follow:
1- Make sure your Compressor clutch work first. You can jump the wire to test it when the engine is off.
When you know the clutch work then you can look for the other things not makeing it activated.
2- It it doesn't work then you know the problem right there.
3- If it works then check the Low and high pressure according to compressor spec.
3- Check your engine temperature sensor. Don't think that your temp reading gauge is coorect then your engine temperature for your AC is working.
4- Check your compressor sensor speed. It has to be in sych with your crankshaft sensor before it allows the clutch engaged to prevent burning your compressor when it is locked up is in freezing mode ( ex.in case some clever people jumping wire to control the clutch bypassing all other rerquirement).
5- If you think these items need to be addressed by professional better then do-it yourself then I have no objection. Good luck on trying.
SOURCE: 2003 Chevy trailblazer, the 4 front dash air
{: ) Check first the fuse labeled HVAC1 10A at the rear fuseblock. If okay, the mode actuator could be faulty. You can try this: turn ignition switch and a/c off for a minute. Then turn ignition on, wait forty seconds. Afterwards, start the engine, and check your a/c again.
SOURCE: trying to locate the low side of the air
Hello, here is the good news, in the R134A systems cars use today and since it was made a requirement they made the high and low side connections different sizes. There are two, normally aluminum lines, that run from the compressor and cooling grills by the radiator. The high side typically runs in the larger of these two lines. If both caps are the same color it is easy to identify the low side as that coupling that comes with the refill systems available to the public will only fit the low side. This is a safety feature they actually thought about this time. I recommend purchasing the refill system that comes with the Gauge and coupling already attached. They go by various names depending on where you purchase them. as far as cost is concerned it is a toss up between Walmart and Auto Zone as to which is cheaper in cost. The larger can will cost a little more but is typically a better buy. I say this because the usual reason for doing a refill is a very small leak on a gasket or seal and the larger cans have ingredients that help seal these and improve performance of the system. The directions for use and the readings you should see on the gauge are usually on the can as well. Do not waste your time trying to refill the system if the temperature is over 90 degrees outside as this will give you problems. Do the job in the early morning or late evening after it has cooled. Good Luck
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