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Message: <blockquote data-quote="cuscostrutbrace" data-source="post: 4093828" data-attributes="member: 3867">Nowadays car A/C all related with the engine ecu.The A/C system place a huge load on the engine,and this robs power,fuel economy,engine running conditions,etc...the ecu will try compensate for this.Hence it need to know when the driver switch the A/C on,besides other engine running parameters during A/C usage.This is where the A/C amplifier do its job to interface between the A/C controls input,ecu and its component output(compressor).When we switch A/C on,the ecu need to cater for the load demand,by adjusting the fueling,idle speed increase,ignition timing adjust.The ecu also tells when to switch the compressor on or off depends on situation,like overtaking,where the engine need more power.The A/C amplifier will regulate temperatures,compressor controls,blower motor controls etc (during Auto mode)Without ecu controlled aircon,it doesnt do all the above.</blockquote>

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