Climate Control Archives - Page 7 of 11 - Brake & Front End
Tech Tip: BMW Blower Motor Issues

Owners of 2000-’03 BMW 525I 2.5 may complain that the blower motor does not work, stays running all the time or does not have proper speed control. The climate control blower motor is controlled by a final stage unit, which receives variable voltage from the climate control head. To fix, disconnect the final stage unit, which is located beneath the passenger side of the dash and installed near the firewall into the lower side of the heater box.

Volkswagen Tech Tip: Air Conditioning Not Operating Properly

For all Volkswagen models (2000-2004), check the N25 A/C clutch coil after a routine pressure diagnosis. The fan control module may be sending a brief voltage signal to the clutch and shutting it off because of an open or high resistance in the coil circuit.

Tech Tip: Mercedes-Benz A/C Off Light Illuminated, A/C Not Functioning

If you receive customer reports in the above models that the A/C Off light is illuminated and cannot be switched off and the air conditioning is not functional, the Refrigerant Level Temperature Pressure Sensor coding in the AAC unit may need to be set to “INACTIVE.” Follow the below procedure to remedy a specification parameter in the refrigerant level logic circuit.

Registration is Now Open for Mobile Air Conditioning Society (MACS) Convention and Trade Show

Registration is now open for MACS-I-MIZE YOUR OPPORTUNITIES for SUCCESS, the 31st annual Mobile Air Conditioning Society (MACS) convention and trade show. 2011 has brought together an exciting collaboration between MACS and long-time training partner Automotive Video Inc. (AVI). Training is pricelessly valuable, but the training at this convention is priced at an amazing value.

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.

Seven Service Facilities Complete Climate Protection Pledge

The Climate Protection Partnership division of the U.S. EPA and the Mobile Air Conditioning Society (MACS) Worldwide recognize seven mobile air conditioning service facilities for being among the first to complete all the steps of the Climate Protection Pledge.

Tech Tip: Sealing Pipe Connections on Porsche Expansion Valve

Under certain circumstances, refrigerant loss from the area of the expansion valve pipe connections can be misdiagnosed as a defective expansion valve. As of production date October 1993, a longer bolt has been used in the installation of the A/C lines to the expansion valve. The new bolt is installed as a precaution to prevent the expansion valve from distorting, which could cause a leak at the pipe connections on the expansion valve.

Tech Tip: Quieting a Ticking or Bubbling Blend Door Noise on Jaguars

A Jaguar S-Type owner may complain of a ticking or bubbling noise coming from behind the fascia/instrument panel when using the climate control system. The noise may be the result of one or more of the

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.

Stronghold for 1234yf is Crumbling – Part II

In this installment of a two-part editorial from R744.com, high refrigerant costs, the need for new plants and pending patent issues put the use of HFC-1234yf more and more into doubt.

Diagnosing A/C Systems with Automatic Climate Control

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?

Supporters of R744 in Mobile A/C Systems Express Problems with 1234yf Refrigerant

The growing reluctance over 1234yf has now led its own proponents and Original Equipment Manufacturers (OEMs) to dreadfully search for a system solution that would enable the use of the refrigerant, no matter what the system cost and efficiency implications