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Problems with Thermador Cook n Vent

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My old Thermador Cook N Vent Downdraft model # CVS45R works fine. However, it started to partially fall at a

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  #1 (permalink)  
Old 02-17-2011, 09:49 AM
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Default Problems with Thermador Cook n Vent
Model Number: CVS45R   Brand: Thermador   Age: More than 10 years   

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My old Thermador Cook N Vent Downdraft model # CVS45R works fine. However, it started to partially fall at a given point on its downward travel as if there was some obstruction, or some loose screw on the mechanism.

How do I check and remedy this?

Thank you,

Lukas



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  #2 (permalink)  
Old 02-17-2011, 12:26 PM
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Default

You will need to disassemble it from below to see what is causing the noise. Be sure and disconnect the power to it. I'm attaching a link to the parts diagram to help you see what you will be looking at.
Downdraft system replacement parts for THERMADOR CVS45RB | AppliancePartsPros.com
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Old 02-17-2011, 06:58 PM
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Hello,
Most likely, the drive arm has loosened from the motor shaft, which causes it to bind up, then release on the way down.

You'll need to get to motor, resecure the arm onto the motor and tighten the screw. Applying a little lock-tite to the thread will help to insure in doesn't happen again.



Motor Access (with unit unplugged from power):

1)Lower unit all the way.
2)Remove the rectangular motor cover
3)Remove whatever is mounted just below the motor, e.g. the blower, transition or vent cover. You should now be able to see the drive arm and link arm which are connected together.
4)Disconnect the two arms
5)Remove the 4 screws that secure the motor housing to the unit
6)Lift the motor up, then out towards you.

Flip it around and you'll see the drive arm. If it's loose, reinstall it, but make sure it aligns with the two switches. On the front of the motor, near the 5 o'clock position, there's a metal, spring-loaded tab you can press that will disengage the motor and let the drive arm spin. Press this in and rotate the drive arm to make sure the arm activates both switches.

Once the drive arm is aligned with the switches, secure the drive arm and reinstall the motor into the down draft.

This should take care of it. If not, you should be able to see anything else that's wrong with it while it's out.

Good Luck,
KC
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