Climate Control Archives - Page 5 of 11 - Brake & Front End
Tool Tip: BMW A/C System Leak Testing Procedure Update

The customer complains of poor or no air conditioning cooling. After further diagnosis, the system is found to be low or empty of a refrigerant charge, but when using an electronic leak detector, no leak can be found. Before replacing parts, perform a nitrogen leak test to confirm the location of the leak.

Tech Tip: Subaru is Leaking Water from A/C Evaporator Drain Hose

If you encounter a customer complaint that there is water on the front passenger-side floor, there is the possibility that the evaporator drain hose is obstructed. The evaporator drain hose will need to be checked for obstructions and modified.

Tech Tip: Mitsubishi Incorrect Air Flow from Vents

Customers of some affected vehicles may complain about one or both of the following conditions: 1. Air flow from the HVAC air vents may randomly change direction and/or the temperature may briefly cycle from hot to cold, and then hot again. This condition is caused by the HVAC controller supplying an incorrect signal and will occur only when the exterior vehicle lighting is on and the instrument panel lighting is set to 70-80% illumination. 2. The direction of air flow may be stuck in one position. Changing the position of the mode dial has no effect on the air flow direction.

A/C Update: Servicing Saturn’s First Generation S-Series A/C Compressors

The 1994 Saturn A/C compressor, used on vehicle models produced from 1991 to 1994, is a variable displacement rotary vane-type pump. The rotor assembly houses five lightweight vanes that extend outward contacting the cylinder wall, creating the compression area. The compressor has an interior control valve that allows it to change its pumping capacity or displacement, reacting to heat loads on the A/C system.

Baja 1000 champion Joe Bacal to Keynote MACS 2012 Conven

For more than a decade, Bacal tested Toyota products at the company’s Technical Center and eventually became their lead off-road specialist

Tech Update: HVAC Diagnostics

Leave it to the OEMs to take a simple system like heating and air conditioning and turn it into an electronic jumble of wiring, sensors and computer components.

Tech Tip: Subaru Water Leak from A/C Evaporator Drain Hose

If you encounter a customer complaint that there is water on the front passenger side floor, there is the possibility that the evaporator drain hose is obstructed. The evaporator drain hose will need to be checked for obstructions and modified. The evaporator hose was modified in production starting in the middle of October 2008.

Tech Tip: Audi L/H To R/H A/C Vent Temperature Difference

With the same temperature settings, different temperature air comes from the outlet vents on the driver side and passenger side. The outside outlet vents release warm air, and the inside outlet vents release cool air.

AVI Offers Mastering Hybrid HVAC Systems Training Video

In the Mastering Hybrid HVAC Systems training video, instructor Dave Hobbs teaches you hands-on fundamentals to servicing Hybrid A/C systems. Advance your diagnostic strategies by understanding these complex systems through live on-car demonstrations.

Tech Tip: Hyundai Engine Overheating Concerns

Some 2004-’06 Santa Fe (SM) vehicles may exhibit an overheating engine and inoperative A/C. Inspection of the radiator fan connection finds it is abnormal. A replacement connector is available (E25). This bulletin provides the procedure to replace the radiator fan motor connector with the replacement connector.

Tech Tip: Kia MIL Illumination with Front Heated O2 Sensor DTCS

If a 2004-’06 Spectra 2.0L exhibits an MIL on

ACDelco Summer Promotion Includes A/C Products, Window Regulators and Fuel Pumps

From June 1 to July 31, customers who purchase $150 in qualifying ACDelco Original Equipment Service and/or Professional air conditioning products, window regulators and fuel pumps earn a scratch-off ticket for a chance to win popular Apple products and more.