How to remove motor on Nutone CV 750 - Broan-NuTone CV750 Central Vacuum

SOURCE: Nutone CV 450

If the top comes off, it will be by the motor and exhaust. Just replace it with the new one, make sure you don't mix up any wires. Also unplug it from the AC first.

SOURCE: Nutone CV-750

You need to determine if this is a problem with the hose or the unit. I would recommend plugging my hose in the wall sideways. This should make your central vacuum run continuously. If the unit doesn't cut on and off it is the hose. If it still cuts on and off it is probably the relay.

SOURCE: I have a nutone CV-750,

It sounds like you could have one of two problems. I would guess either a short in your house, or a bad relay. If you plug you hose in sideways it will bypass the low voltage wire in the hose. If the unit doesn't shut on and off then you have a short and need a new hose. If the unit continues to cut on and off then you probably need a new relay. The relay is really easy to change out yourself and there are places to buy online.

SOURCE: Nutone CV-750 stops during use

This was one of Broan/Nu-Tone's beginning attempts at lower-decibel machines. Like so many of their competitors, they choked the motors in dense foam in the head unit and made it too difficult for them to cool. Make sure that you're not blocking or suffocating the ventilation, but don't be surprised... a plethora of makes and models like this one have had to be pulled and discontinued because of the overuse of muffling foam snuffing out good machines before their time.

Chalk it up to a design flaw and start yanking that foam out. The specs on this puppy make it far too good a machine to pass on just becuase of the manufacturer used you as a beta test before they should have relaeased it from proto. If the increase noise irritates you, read up on sound waves, frequencies and subsonics and get creative in how you isolate the parts that bother you. Chances are, though, you'll be just fine.

Lastly, if you can tell me the age of the machine and get me the numbers off the motors I'd love to know more about this situation you're in. You're running dual 2-stage bypass 12.5 amp motors. That puts you roughly in range of a Lamb 472, one of our industry's most hardy motors. If THOSE are what you're running and they're over-heating, you've got a firehazard in your vac that *somebody* never should have put certification on for marketing.