Car Problem Reports

Mazda RX-8 New Climate Control Unit if Heat/Cold Knob Won't Adjust to Right Temp

Mazda RX-8 Problem
43 Reports
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Model Years Affected: 2004, 2005, 2006, 2007, 2008, 2009, 2010

Average Mileage: 67,013 mi (20,000 mi - 110,000 mi)


If the climate control's heat/cold knob is not adjusting to the desired temperature, a new climate control unit may be needed.

  • , , 45,000 mi

    no heat even when turned to high heat you have to wiggle switch to work

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  •  Rookie

    I had the same issue where jiggling the knob was the only way to change the temperature. The solution isn't really difficult. It'll take about an hour and a half. You have to remove the radio/climate control faceplate, then disconnect and remove the climate control unit. Disassemble it all the way down to the circuit board. There, the temp control knob will have 3 pins that go all the way through the board. If you look at the back side of the pins you'll notice: 1) There isn't much solder on it, 2) The solder is cracked. Just add more solder to the pins. I used Rosin based. Reassemble and test. Worked like a charm for me. Even if you've never done anything like this before, give it a try. You'd be surprised how easy it is.

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  • , , 45,000 mi

    The heater control is not working...It's winter and all I get is cold air...No heat

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  • , , 50,000 mi

    A/C knob doesnt work. Only goes from 0 to 16 and nothing in between and you have to jiggle it and mess with it to get 16. This is clearly a common problem from the design of the car and should be recalled. Needless to say this and other problems with the vehicle (condensation in the taillights etc.) will make sure I never buy another Mazda. I love the car, but the service and poor design doesnt make it worth it.

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  • , , 34,000 mi

    Hot air with air conditioning, cold air with heat. Wiggle knob and rotate to get correct temp. It sometimes takes a while to get the temp I am asking for.

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  • , , 61,000 mi

    climate control heat not holding setting. Cd player skips

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  • , , 89,000 mi

    Temperature control knob is messed up and you have to twist it back and forth between hot and cold and then hold it on the cold for a second or 2 for it to hold cold.

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  • , , 85,000 mi

    Solder points break in unit. Resolder connections. About 3 hrs to fix and back to normal. Search Google for pictures and instructions.

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  • , , 52,000 mi

    Of course, I bought this car used. It was summer so I tested the AC which seemed to work. The same week I noticed the heat was possessed. It is either super hot, or super cold. There is no in between. It seems to decide when and where it wants to get hot, or to get cold. Usually I can rotate the knob back and forth to fix this. With all these reports, I would think this is a faulty design or manufacturing. I assume there is a recall for this? If not I may just contact a lawyer and see about starting a class action suit. Oh, and today the airbag light literally just came on out of no where.

    Hey all, found a do-it-yourself guide to fix this problem. I plan on doing it, then sending Mazda a bill for the labor at standard shop rates. :-)

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  • , , 65,000 mi

    Temp control does not work

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