Question about 2004 Mazda 6

1 Answer

AC only works on low speeds and shuts off Compressor on 3 and 4?

When I turn on the A/C (which is fully charged) it works on the lowest two settings/speeds ... but as soon as I turn it over to the higher speeds it shuts off the compressor and tuns on the fan ... which blast cold air for a short time until it has gone through what the A/C unit was pumping out at the very lowest settings ... The place where I bought it basically told me to go "get lost" ... they can't scan it or fix it ... I know, nice dealership ... but before I take it to some Mazda guru and get told it's a bot load of cash or get ripped off .... I was just wondering if it would be something small .. as the system works, but something tells the A/C unit to shut off on high speeds .... any help?

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  • adross May 19, 2009

    Remember .... the unit works fine ... low speeds ... shuts off the unit when you turn it on high ... works great low ... shuts off in its own on high ..... heat works ONLY on 3 and 4, but not on 1 and 2 .... no water leaking btw

  • adross May 20, 2009

    Ok .. will let you know .. picking up the part this week

  • Ray Keckeisen May 11, 2010

    is there water dripping from the car,passenger side,if not drain may be clogged,this will cause the evaporator to freeze and create high pressure which will turn off compressor,get back to me and we'll go from there

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  • Master
  • 710 Answers

YOUR BLOWER MOTOR RESISTOR NEEDS TO BE REPLACED. IT IS LOCATED IN THE AIR DUCT NEAR THE BLOWER MOTOR. I BELIEVE IT HAS THREE WIRES ON THE PLUG THAT SUPPLIES POWER TO IT. REPLACE THIS AND YOUR A/C WILL WORK AT ALL SPEEDS. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. GOOD LUCK. P.S.
:RESISTOR SHOULD BE UNDER 40 DOLLARS TO BUY.

Posted on May 18, 2009

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  • Mark L. Roberts Jr.
    Mark L. Roberts Jr. May 19, 2009

    THIS SHOULD FIX THE PROBLEM, I AM SURE. LET ME KNOW. THANKS IN ADVANCE FOR AN HONEST RATING. BEST OF LUCK

  • Mark L. Roberts Jr.
    Mark L. Roberts Jr. May 20, 2009

    WE LOVE FEEDBACK. STILL WAITING FOR A RESPONSE. BEST OF LUCK TO YOU.

  • Ed Devine Oct 04, 2011

    This sound like a fix for the fan or blower not working on 3 or 4, but what about a situation where the fan works fine on all speeds, but when in 3 or 4 the A/C compressor disengages and the A/C indicator light in the dash turns itself off. If you cycle the fan switch off and on back to position 2, the A/C will work for a while ad cool the car, but sooner or later the A/C indicator starts to blink and goes off and no cooling until you cycle the switch. I've replaced the compressor and still no luck.

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