Climate Control Archives - Page 3 of 84 - UnderhoodService
Underhood Update On R-1234yf Refrigerant

If you haven’t had a lot of experience dealing with R-1234yf in your shop yet, get ready. You’re going to steadily be seeing a lot more of this refrigerant in the coming years. Underhood Service talked with ASE Executive Director of Special Projects Dave Cappert about R-1234yf updates and best practices techs need to know to be able to service these vehicles before one catches you off guard.

2013 GMC Acadia Dash Detail
Jeep Tech Tip: Poor A/C Performance

Some Jeep Liberty and Nitro owners may complain that A/C performance is poor and that the A/C is not cooling enough or fails to keep the passenger compartment cool. This update will provide customers with improved A/C performance.

Jeep AC performance
Gaskets: Ignoring And Top Off Troubles

Engine oil and coolant leaks should not be ignored. Topping off the levels is often more costly in the long run than repairing the leaking gasket or component. Advising a customer about the potential damage that can occur if they decline a leak repair is not a scare tactic, it is important that they know the real price of their decision.

Do Cabin Air Filters Help Winter Breathing Problems?

When some people think about cabin air filters, they conjure up images of summertime, air conditioning and musty smells. The reality is that cabin air filters work the majority of their magic when temperatures drop and cause winter breathing problems.

Turbo Tech: Power Stroke 6.0 Diesel Turbo Control

UNDER CONSTRUCTION

GM: Eliminating Air Conditioning Odor

Models: 2014 and prior GM passenger cars and trucks Some customers may comment about musty odors emitted from the HVAC system at startup in hot, humid conditions. Cause This condition may be caused by condensate buildup on the evaporator core, which doesn’t evaporate by itself in high humidity conditions. The odor may be the result

GM Air Conditioning odor
R-1234yf Safety Procedure Checklist

Remember that R-1234yf is only mildly flammable. To become flammable, the mixture of air and refrigerant in a closed area like a vehicle cabin would need to be between 6.5% and 12.3% of the chemical vapor. This mixture must then experience a significant amount of energy to ignite it. In some lab tests, a spark

R1234yf safety procedures
Refrigerant Revolution: What R-1234yf Means for Service, Equipment, Safety

The new R-1234yf refrigerant is more than just a new jumble of numbers and letters on a label. For your shop, R-1234yf means several new procedures, a certification and new equipment in order to properly handle these new systems. Why the difference in handling and servicing R-1234yf systems versus R-134a? The reason is flammability. Don’t

r1234yf vehicle service
Case Study: 1996 GMC 1500 with no temperature control

• No A/C, no vent control, no temperature control • A/C and recirculation buttons will not light up • All new components, including compressor and control head Cars with a little age on them can be temperamental when diagnosing what might seem at first to be an easy problem. This 1996 GMC had already gone

Chevy AC electrical case study
A/C Oil Service: Avoid Compressor Failure With Proper Maintenance

HVAC systems often fail because the air conditioning compressor fails. Not following the proper service procedures or compressor oil recommendations could be factors that contribute to premature compressor failure. Refrigerant Since the mid-‘90s, all vehicles have been using R-134a refrigerant, but soon, vehicles will arrive at your shop equipped with R-1234yf refrigerant. This is the

AC Oil Compressor failure
Saturn HVAC Performance Issue: Noise Concern

Condition Some customers may comment that the vehicle’s A/C is not cooling or is not cold enough and/or the A/C compressor is noisy. Correction Do not replace the A/C compressor. For concerns of A/C system noisy during slow parking lot maneuvers, replace the HVAC hose with suction line (P/N 20757021 or aftermarket equivalent). For concerns of A/C

Saturn Outlook hestitation at high mph
Tech Tip: How to Properly Install an Orifice Tube

This Tech Tip is presented by our friends at the Mobile Air Conditioning Society. Installing an Orifice Tube properly is an important part of general A/C maintenance. Steve Schaeber explains how to install the Orifice Tube in relation to refrigerant flow, the reason for its design and the tool needed for removal. [computer] Please enable