Question about 2006 Mazda 3

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I have a 2006 Mazda3. I noticed whenever my air conditioner or heat is on it makes a sound like a lawn mower when I acceralate. Any ideas of what this could be ?

I have a 2006 Mazda3. I noticed whenever my air conditioner or heat is on it makes a sound like a lawn mower when I accelerate. Any ideas of what this could be ?

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Well, I think you can rule out the AC/heater fan inside the car. That would make noise even just sitting in the driveway.

Many/most vehicles are designed to run the AC compressor not only when the AC is on but also when the defroster is on. This is to keep the AC compressor lubricated through the winter months also.

It should not be a belt problem as that belt is always turning anyway which should then rule out the pulley bearing at the AC compressor.

I do suspect your problem is a major internal failure of the AC compressor. This can be easily checked by a technician [or yourself if qualified]. Locate the electrical connector at or to the AC compressor. Two people: With the AC turned on, in park, increase the engine speed so you can here the noise. Disconnect the AC compressor electrical connector. If the noise stops instantly, the compressor has failed. A quite expensive repair. Have a reputable shop locate a re-manufactured compressor for you. That will help some on the cost.
Bestaluckto you!!
M

Posted on May 09, 2014

Testimonial: "Yes, my husband said he suspected it was something with the ac compressor. Thank you for you prompt response."

  • sarap May 09, 2014

    If disconnecting the compressor stops the noise, and you must wait to do the repair, then leave the compressor wire disconnected. Because if that failing compressor would lock up while you were driving, belts would probably be flying all over and you would be stranded. The water pump would stop and you would cook the engine if you kept driving. Lotsa $$$$ then!! Be safe and take good care of yourselves. T'care, M

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Prob the balance weight on the internal blower motor or failed clutch on the ac pump

Posted on May 09, 2014

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