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Your best source for complete troubleshooting and diagnosis information on auto A/C systems. Our information provides proper repair, recharge, service and maintenance procedures for all automotive air conditioning systems. Regardless if you have a current CCOT (cycling clutch orifice tube) system or an expansion valve and POA valve system, we've got the information you need. From step-by-step help on retrofitting and recharging to complete A/C compressor or component replacement, our A/C manuals provide you a quick and easy methods that have been proven helpful to everybody from the apprentice to the professional.

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Auto A/C Technical Tips and Tricks the pros use every day!
Getting Ready for the A/C Season!
Your Auto A/C Tools & Equipment Checklist

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Before you start to rely on your A/C service tools and equipment, it's a real good idea to check and test them now, before the season starts. We've compiled a complete check list for your review. Here's some details that you will want to go over:

Manifold Pressure Gauges:
Yes, gauge sets should be checked regularly, not just at the beginning of the season. They typically go out of calibration and they can even leak. When the low pressure gauge is out of calibration it makes it really difficult to get any sort of accurate vacuum reading. Keep in mind that they have probably been bumped around a few times and who knows how many hot exhaust manifolds and radiator fans the hoses have been caught in. So it just makes sense to check and calibrate your manifold gauges. You can also leak test them using your vacuum pump (just block the high and low couplers and pull vacuum on the yellow center hose) After that, you add an ounce of refrigerant to pressure test them. Use a leak detector or bubble check fluid on all the connections.

If you own a charging station, you should be able to do the same sort of inspections and tests. However, review your Owner's Manual on that equipment for complete details.

Vacuum Pump:
Probably the most overlooked piece of equipment on the floor of every auto A/C service shop. These pumps require regular oil changes; at least every 15 to 20 hours of operation. As your vacuum pump has probably sat for most of the winter, it's a good idea to get that oil changed now. You should seriously consider a complete service including Vacuum Pump Cleaner, Oil and Anti-Friction Additive.  If you're in doubt about your vacuum pump's operation, you should review the information we released that shows you Everything Vacuum Pump Manufacturers Didn't Want You to Know.

Recovery Station:
Your recovery station has filters that require regular service. You should be taking the time now to check (and replace) these filters as required. You may also find that it's a good idea to have a spare on hand. Every recovery station will be different, so you have to refer to the manufacturer's information for those details.

Couplers and Adapters:
Quick couplers can leak over time. You may also find that you require some of those hard to find adapters and fittings that you need to service particular vehicles. Check your A/C couplers, fittings and adapters to be sure you've got what you need.

Small tools and hand tools:
There always seems to be something missing when the heat is on. Remember that you will need your A/C disconnect tools, thermometers, oil and dye injectors, orifice tube removers and valve core removers.

Small Parts Supply:
Don't get caught without the right o-ring, gasket or washer. With the variety of applications on the road, 4 o-rings sizes will just not give you the coverage you need. Be sure your o-ring kits are full and ready for the season.

Other Consumable Products:
Remember all of those other items that you reach for every day like A/C Compressor oil, UV Dye and Leak Detection Fluids? Be sure that you have a supply so that you can complete those service jobs when they arrive. (You may want to view this video help on how a UV enhanced external leak detection fluid works! These fluid provide another good reliable method for auto A/C leak detection).

Depending on your leak detector and other tools you use, you know batteries never hold up through the winter. Double check your supply and be sure you have a supply of fresh batteries on hand.

Don't forget... you will really need
Your Auto A/C Connection!™ :
This is an absolute must! The Auto A/C Connection!™ is a complete and perpetual auto A/C Service and Parts Source Guide. If you service auto A/C, then you have to have this. It includes constantly updated information that you use every day! Complete detail like refrigerant capacities, A/C compressor oil details, clutch air gap details and more! You just won't believe what's included... and best of all, it's free!

Auto A/C Manuals  - We wrote the book on auto A/C service, repair and recharging! Get all the details now!

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