Question about Broan-NuTone CV570 Central Bagless Central System Cyclonic Vacuum

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Nutone cv750 problem

The unit works fine for about 10 solid minutes then trips it's internal breaker. I wait a few minutes and push the reset and it's good for another 10 minutes and the same thing happens. What do I need to fix this problem? Thanks, Jim

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  • jlaley Sep 01, 2007

    I did check the filter and even replaced it with a new one. Someone suggested that the circuit board could be causing it to trip. I don't mean the breaker in my panel box. Vacuuming for 10 minutes works fine then it shuts off. If I wait a minute or two the reset button will stay in and it works again for maybe 5 to 10 minutes this time. The motor sounds fine with no laboring or excessive heat coming off it, it just trips. Could the reset button itself be weak?

  • jlaley Sep 01, 2007

    I don't have a cv570 model, mine is a cv750 like it says in the title. Are they the same?

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I doubt that's an electrical breaker - because it wouldn't take 10 minutes to flip, it would happen almost immediately. It must be the heat breaker. There are two reasons your vacuum system could be overheating and tripping that breaker. Either you need to replace the filter - if it's partially clogged then the motor may have to work too hard to get suction and cause it to overheat. I'd suggest checking the filter first, because that's the easy fix. If it's not the filter, then your motor is going out. You'll want to replace that. Check the filter, and let me know. I'll see if I can find a place to order a new motor for it.

Posted on Sep 01, 2007

  • John Goodman Sep 01, 2007

    I don't think it's the reset button. I suppose that's a remote possibility, but the timing of it seems wrong. I could see the reset button causing it to shut down, but I don't see why you would have to wait a minute or two to restart it if that was the case.

    The reason I thought it was a heat problem was because of the fact that it runs for 10 minutes first. However, if the motor is not getting hot, it is likely the internal breaker. I knew you didn't mean your breaker box - there's an internal breaker as well.

    Item 11 on this parts list:
    http://parts.broan-nutone.com/nutone/Sho...

  • John Goodman Sep 01, 2007

    Ah, I didn't realize. Sorry about that.

    Parts for your model are here:
    http://parts.broan-nutone.com/nutone/Sho...

    However, it is a bit different. From what I can tell, there isn't a separate breaker in this model. I believe it is integrated into the control board (meaning your friend is probably right).

    The board is $153.50 - item 20 on that list. A bit more pricey than just the breaker for the other model.

    Seeing as how the switch is $2.44, and there is a small chance that's the problem, you might want to order that. I think it much more likely to be the control board, but we're talking about $2.44 versus $153.50 for parts.

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