Question about 2004 Acura MDX

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2004 acura mdx. turn on air conditioner - no air blows from front. rear air blows, but not cool. cannot hear compressor coming on. checked fuses - they look okay.

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I have the same problem with my MDX. I live in the Bahamas and there are no Acura dealerships here. I had two mechanics look at it and they could not fix the problem, so I took matters into my own hands. After checking for blown fuses I did a self diagnosis on the climate control panel, I got a DTC that related to a fault in the blower motor circuit. I went through the step by step diagnosis of the circuit and found that the blower motor was faulty. Acura's climate control has a couple sensor that monitor the blower speed, if the sensor do not detect that the blower is running they will not allow the compressor to run, in essence the rear blower will run but the system will not cool. You may need to replace the blower. The quickest way to check if the blower is faulty is to pull the connector off the blower, turn the iignition on and the ac system on, You should get battery voltage on the connector. If you have battery voltage at the connector and the fan doesn't run the youv'e solved the problem. If you don't have voltage at the connector with the ignition switch on and the ac system on you problem could be the front blower power transistor. If you need diagrams and how to retrieve self diagnostic DTC contact me: engineeredelectric@gmail.com

Posted on Aug 17, 2010

  • randgc Aug 18, 2010

    Wow !!!! Wish I had had this info a few days ago. I could not figure it out so I gave in and took it to the dealer yesterday. They left a message last night that it was a bad blower motor. I tossed and turned all night because I could not figure out how that would keep the compressor from kicking in. Paid $20 for an FixYa solution that said it had to be a servicing issue with the freon. At least I feel better now that the shop really found the problem. I was preparing for another call with more parts that needed to be replaced. Thanks again.

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