Question about Broan-NuTone Intermediate Whispaire WA6542SS Stainless Steel Kitchen Hood

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Wobbly Fan----Nutone Whispaire WA6500

On high speed the fan is noisy.On low speeds its fine. Looking at it run the fan wobbles on high speeds. None of the blades are broken.
If while running I push on the middle of the --VERY CAREFULLY it works fine. But on restarting the same wobbly fan noise occurs

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  • Anonymous Mar 12, 2014

    nutone wa6500 whispaire is not working at all . what do i need to fix it

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  • 38 Answers

Definetly need a new blade

#K7458-000 Boan/nutone part number

Posted on Feb 08, 2009

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My ac is not working I have a Chevy Tahoe 2005 the fans won't turn on either .


Hi Maria , The A/C system wouldn't keep the fans from running but none working cooling fans will keep the A/C from working ! This is a fairly complex system if your not familiar with this sort of thing ! I will add the description from the factory service manual.
Cooling Fan Control - Two Fan System
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During low speed operation, the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan s/p relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM supplies a ground path for the high speed fan relay and the cooling fan s/p relay through the high speed cooling fan relay control circuit. This energizes the cooling fan s/p relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the high speed fan relay coil is energized closing the relay contacts and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit to the right cooling fan. During high speed fan operation, both engine cooling fans have there own ground path. The result is a parallel circuit with both fans running at high speed.
Do you have a check engine light lit ? The thing to do would have it check at the dealer or a ASE certified repair facility ! They could hook up a advanced scan tool an diagnose fairly quick ! Or you could find a wiring diagram an try testing with a volt meter yourself ! But watch yourself so you don't short out the PCM - engine computer !

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P0495 & p0128


I am thinking you are on the right track. A noisy, wobbly fan has to be replaced and replacing the thermostat could reduce the fan speed as the problems are interrelated.

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Check all your screws especially the set screw at top of fan that goes into rod. Blades could be warped from the water. Ball of fan not set in bracket correctly. When your buying a fan, look for blade pitch.13 degree or better is best. You shouldn't have to use the fan on high unless it's a low-end fan with a low blade pitch. It's costing you more money to run the fan on high. Sorry to get so preachy, I'm a fan dealer .

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Light Switch Schematic For Nutone Whispaire WA6500


No they shouldn't come apart. You need a new part. They are quite cheap - I have seen them anywhere from $4 to $15.

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HI. The most common issue here will be with a loose motor shaft. This is the part that the fan blades are mounted on. When this occurs, the looseness will cause the motor, and shaft to wobble, thus, causing this noise you here at high speeds. The wobble is less violent during the slower speeds, so it is not loud, in this case.

The second issue will be a warped fan blade. This will cause the fan to rub against the shroud, thus, creating the noise, as well.

If the shaft is loose, or bent, the entire motor will need to be replaced. Now, if the fan blade is warped, you can, simply, unscrew the blade from the shaft, and replace it(on most model)

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Sounds like fan has become faulty - suggest contact manufacturer directly

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You can remove it and bench test it by applying 120 volts to the fan leads. Do you know how to do this -- it can be dangerous if not done properly.

You can also use a voltmeter to measure resistance and check continuity of the motor coils.

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