Question about 2004 Honda Accord
AC compressors are driven by the surpentien belt that drives all the other components, such as , alternater, water pump, power steering, etc. When the AC is not on it requires nearly no power. Only the pulley is retating. When the AC is on, an electric clutch drives the compressor through the pulley. When the engine is idleing you may notice a momentary slight change in speed when the AC is turned on. I'm told the compressor requires about 7 HP to drive it. So, yes it has an effect on the fuel consumption. However, the cost of running the AC may not be significant. Try checking your milage with and with out the AC. Be sure to drive in the same area and type of traffic when testing. You should know that the AC is on automaticly when you use the windshield defroster setting. Some cars have the AC on other times or even all the time.
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Posted on May 19, 2011
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Posted on Jan 02, 2017
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