Question about Broan-NuTone CV450 Central Bagged Central System Vacuum

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NuTone CV-353W does not turn off

Unit keeps running after manual override switch in OFF Low voltage wires disconnected> Problem Relay Switch bad! How to Replace relay? I have never done this task before. Any one who has tried doing? has done successfully, please help I am OK with some electric work, but not a pro. I have some tools, can dismount the unit from bracket, open the top. Then what next?

Posted by go2raju on

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reddevil6

Lauren Junge

  • 1673 Answers

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.

Posted on Jun 22, 2008

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Faith

  • 95 Answers

SOURCE: I have a 3 year

A great way to check if your switch in the hose is bad would be to turn the hose sideways in the inlet. If the unit turns on you most likely need a new switch.

Posted on Jan 20, 2009

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I will assume that you disconnected the switch from the circuit when you did the continuity test -- that is really important.
If so, then i think that the relay inside the top of the unit is stuck on, or the low voltage wires (inside the top) going to the relay are shorted together.
You can easily remove the top after removing 3 (or 4) screws from the upper side of the unit. Be careful to align the vents in the top with the cooling ducts from the motors when replacing the top.

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You probably have a stuck relay or wires are touching. Pull the low voltage wires off the vacuum, if it keeps running it's the relay. You can try tapping with medium force next to where the low voltage wires are attached to the unit using the handle end of a hammer. Even if this works it's time to replace the circuit board. Check these guys out:

http://www.vacuumsystems.net/



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1 Answer

Unit will not turn off. Have to unplug it.


You probably have a stuck relay or wires are touching. Pull the low voltage wires off the vacuum, if it keeps running it's the relay. You can try tapping with medium force next to where the low voltage wires are attached to the unit using the handle end of a hammer. Even if this works it's time to replace the circuit board. Check with a local vacuum cleaner repair center. You can disconnect the pipe and low voltage wires and it should just lift straight up. Take it to the repair center so you can save service call fee, because after all it's just a large canister vacuum.

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1 Answer

Nutone CV353 does not shut off, think it is the relay board


You probably have a stuck relay. You can try tapping with medium force next to where the low voltage wires are attached to the unit using the handle end of a hammer. Even if this works it's time to replace the circuit board. Take the unit to a local vacuum repair center for service.

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1 Answer

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Some models have an on/off switch on the power unit itself. This switch is used to turn your power unit on when you are right at the machine.
If there is no switch on the power unit, unplug your power unit from the wall socket, look for two low voltage wires coming out of the power unit. These two low voltage wires are usually either attached with terminals or are tied to two wires coming out with plastic screw on wire caps. Disconnect the 2 low voltage wires. Plug your power unit back in. If the power unit does not come back on then yes, the problem is most likely a short in the outlet wiring. If the power unit still comes on with the 2 low voltage wires unattached, then the problem is in the internal circuitry of the power unit, usually a relay or some units have a circuit board with relay, circuit breaker and other components on it. The relay or circuit board will have to be replaced.
It's a little difficult to check for a short if you have multiple outlets, but if you've recently done some renovations you might start checking in that area.

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1 Answer

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If there is a switch on your hose, it may be broken.
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1 Answer

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2 Answers

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