Question about Thermador UCV36A 36" Universal Cook 'n' Vent Downdraft Kitchen Hood

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Thermador UCV36 - motor won't raise fan

My down draft fan broke last night. My wife pushed the button to stop the fan, upon which it started to retract itself without stopping the fan (correct operation would have been to stop the fan and stay put). I had to switch off the circuit breaker to stop it. After turning the power back on and pushing the button to raise the panel, the motor used to raise it started, but the panel stayed put. After a few tries, I grabbed the panel and managed to simply pull it up (I've never tried that before so I don't know if that is normal) all while the motor (but not the fan) was running. I think the mecanism to raise the panel is two jack screws, but I don't know for sure. Could anyone give me a few trouble shoot hints. Could something in the rasing mecanism have been dislocated, disconnected or similar?

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SOURCE: Downdraft up and down

this is ID 25898888.

Posted on Feb 22, 2008

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SOURCE: thermador cooknvent downdraft CVS36R

My quess is you would have to replace the switch / button if its not working properly.

Posted on Oct 24, 2008

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SOURCE: Cook 'n Vent Downdraft Up/Down Mechanism Replacing

just the switch should be replacable. My vent has a screw at each end (philips flatheads - accessible only when vent is up) just under the top cap. Removing the screws and cap should give you access to the switch. Just make sure you cut your breaker off first.

Posted on Jan 07, 2009

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SOURCE: Thermador cook top with down draft ventalation

I would think you can. Most of the cooktops are 240v and the vents are 120v, so the vent may be feeding off of one of the cooktop's hot wires. My vent is fed from it's own receptacle but is harnessed along with the cooktop's 240v.

Posted on Jan 07, 2009

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This was a somewhat simple fix. Make sure the hood is in the down position. Unplug the unit from power(important!). Unscrew the screw that connects the drive arm to the drive link. Unscrew the motor/control cover, then unscrew the 4 screws holding the complete motor/control unit on (2 Phillips-head screw on each end of the assembly). Pull the complete motor/control assembly out, be careful of wiring. Once out, push the drive arm on firmly onto the motor assembly and tighten the screw. When doing so make sure the 2 micro switch arms are not caught and are free to switch.
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I found this link to be useful for a parts/configuration diagram:

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I have the same problem. Seems to be pretty common that the motor that raises the unit goes bad. Ours is 2 1/2 years old and has not seen that much use....that motor should not have failed that soon...and this is a high end product!!! I have been quoted $289 for a replacement motor and $150 for labor!! So, $450 bucks....gads. The unit, new, cost about $900, as I recall.

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