My Nutone CV-750 stops running every 15-20 seconds or so, and restarts within 5 seconds, and then stops after again 15-20 seconds, and then stops for 5 seconds over and over and over. Very systematic and predictable. The unit is 9 years old. What could be causing this? The control board? One of the motors? Is it work repairing or should I replace it?

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: Power Unit VX475 Stops Working

the problem is NOT the motor. Its that the motor is not being cooled. You have to replace the whole top. Call Nutone and its only a $30 part

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.

SOURCE: I need a relay board for a Nutone CV 450 12.6 amp

Unfortunately I don't have a part number for you, but you can call this number 1800.322.2965. Tell them you need a new relay board for your system and they'll be able to help you. They cost around 99$. for anything else you might need, go to www.thinkvacuums.com

SOURCE: have a nutone CV-450. Suction is gone at the

The first thing to do is to disconnect the pipe coming into the unit. If there is suction there than you probably have a break in the line. If there is no suction when you disconnect the pipe coming into the unit than it is most likely the motor gasket. This gasket can sometimes get sucked into the motor causing problems. Remove the lid to the central vacuum, than disconnect the motor, you should be able to tell if maybe the gasket has been off center or if it has been sucked up in the motor.