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Tech Update: HVAC Diagnostics
By Scott "Gonzo" Weaver
April 24, 2013
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. HVAC units have come a long way from when I started in the business. A pressure switch wa...
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R-134a Refrigerant Retrofits Are an Option - for a Price
By Carl Fedele
April 16, 2013
Is it worth the trouble and cost to have the R-12 freon air-conditioning system retrofitted to R-134a refrigerant? It's important to explain to the customer that the term "retrofit" describes special procedures that are required to convert a R-12 system to an alternative refrigerant. This service wi...
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Service Tech 2013
January 16, 2013
Nearly every tire dealer offers vehicle service, whether basic maintenance or complete repairs. We've compiled an extensive collection of key questions often asked by service technicians of all skill levels, and responses from our cadre of auto service experts.
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Hybrid Vehicle A/C Service Basics
October 19, 2012
As you may know, the air conditioning compressors in many hybrid vehicles are operated by an electric motor instead of a drive belt.
The motor’s insulated windings are immersed in the compressor’s lubricating oil. T...
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Refrigerant Change from R-134a to HFO-1234yf is Underway
By Ed Sunkin
April 9, 2012
Beginning in 2011, HFO-1234yf was expected to come out on top as the new refrigerant of choice in Europe. While this issue may not affect repair shops and tire dealers in the U.S. for a while, some techs may already have seen HFO-1234yf systems, as European models begin the R-134a phase-out and make...
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