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Directions: GM Leads the Industry in the Race for a Greener Refrigerant
The switch to HFO-1234yf is expected to help GM vehicles meet the overall requirements of the U.S. EPA's latest motor vehicle greenhouse gas regulations. More
Tech Tip: J2788 Test Equipment Needed to Diagnose and Recharge Today's A/C Units
In order to remove all the refrigerant from later-model vehicles during the recovery process, a J2788-compliant A/C machine is required. This is due to later-model vehicles using less refrigerant, which older A/C machines cannot fully recover, leading to potential problems. More
Tech Tip: A/C Inoperative, A/C Light Flashing on Toyota
This bulletin provides information regarding countermeasures to the A/C magnetic clutch relay for A/C light flashing (inoperative A/C) ­issues on some vehicles equipped with a magnetic clutch compressor. More
Tech Tip: No or Insufficient Cooling Output in Mercedes-Benz C-Class
If an owner of a 2004 C 240 Sedan complains of no or insufficient cooling output, it could be caused by the refrigerant line, whose inner coating has come loose in the flexible section of the hose, causing constriction. More
Tech Feature: A/C System Diagnostics
Diagnosis is often the biggest challenge, especially if the cause of a no-cooling problem is not obvious. Is it the refrigeration circuit, an electrical problem or a control issue? More
Directions: The Impact of HF0-1234yf on Service Shops
According to the new refrigerant's developers, there are chemical differences between HFO-1234yf and the current R-134a system. As a shop owner, you'll need to learn the Safety, Equipment and Charging Issues surrounding this new refrigerant. More
Leak Detection Tools & Equipment
Having the right tools to help you find leaks can save time and effort, and reduce the risk of comebacks. This special section features some common types of leaks and what kind of equipment you can use to find them, as well as a Leak Detection Product Showcase. More
Lexus Tech Tip: A/C Condenser Fan Relay Corrosion on 1998-2000 LX 470s
Some 1998-2000 model year LX 470 vehicles may have a condition in which the A/C condenser fan continues to run after the ignition is turned off due to corrosion in the relay connector. A repair kit (P/N 88840-60070) consisting of a new relay and sealant has been made available to correct this concern. More
Tech Tip: Jetta's A/C is Not Working; No Power to the A/C Clutch
Potential causes include malfunctioning A/C switch, air conditioner high pressure sensor, defective fan control module, ground, power and/or throttle basic settings. More
Toyota: Insufficient Cabin Cooling
Some 2001-’04 Sequoia and 2000-’04 Tundra vehicles may exhibit a condition where the air conditioning system does not sufficiently cool the cabin. Adjustment of the water control valve is necessary to correct the condition. Repair Procedure: 1. Turn the temperature control knob to the full cold position. More
 
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