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Some cars are produced with block heaters from the factory, while others are fitted with block heaters as an aftermarket add-on. [3] The most common type of block heater is an electric heating element in the engine block , which is connected through a power cord often routed through the vehicle's grille.
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On August 17, 2012, AutoZone expanded into their 49th state Alaska by opening their 5,000th store in Wasilla, Alaska. In 2012 AutoZone opened their first store in Brazil. [28] In December 2012, AutoZone purchased AutoAnything.com, an e-commerce leader in aftermarket automotive parts based in San Diego, California. [28] [29]
A defogger, demister, or defroster is a system to clear condensation and thaw frost from the windshield, backglass, or side windows of a motor vehicle. The rear window defroster was invented by German automobile engineer Heinz Kunert .
Defrosting is controlled by an electric or electronic timer. For every 6, 8, 10, 12 or 24 hours of compressor operation, it turns on a defrost heater for 15 minutes to half an hour. The defrost heater, having a typical power rating of 350 W to 600W, is often mounted just below the evaporator in top and bottom-freezer models. [ 2 ]
The refrigerant was developed by the DuPont/Honeywell company and is more expensive per pound than R-134a. R-1234yf can be found in late-model cars and is not cross-compatible with older R-134a or R-12 systems. Of the three refrigerants, R-1234yf is the best for the environment with the lowest global warming potential number which is about a three.