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JimLk  
#1 Posted : Wednesday, May 14, 2014 2:05:57 PM(UTC)
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JimLk

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Joined: 5/14/2014(UTC)
Posts: 2

The vent fan stopped working on my Kitchen aid Microwave model KHMS2050SSS.
I have replaced the control board and the Base Thermostat and the vent is still not working.
I checked the two power resistors with the following results that appear to be in spec
41 ohm/50W - received 41 ohms
20 ohm/25W - received 20 ohms
I checked the Fan Motor with the following results that appear in spec
Pins 1 and 2 - received 18 ohms
Pins 1 and 3 - received 21 ohms
When I press the On button and cycle through High, Medium, Low and Off I can hear a click at the control board with each press of the button.
What other components can there be a problem with that I can check that may have failed?
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jjha  
#2 Posted : Wednesday, June 11, 2014 10:21:41 AM(UTC)
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jjha

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i'm having the same problem. the low high and off buttons make a sound when when pressing but no vent...it does turn on at times when i give it a good bang though. not sure what it could be since i cleaned all the connectors that had oil buildup...
JimLk  
#3 Posted : Thursday, June 12, 2014 3:59:48 AM(UTC)
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JimLk

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jjha, I replaced the vent fan motor and that solved my problem.
jjha  
#4 Posted : Thursday, June 12, 2014 6:44:46 AM(UTC)
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jjha

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thanks for the suggestion jim. the thing is almost 20yrs old so i may just replace the whole thing if it acts up again.

it was working fine until my moth-in-law sprayed some cleaner down the microwave vent. then it only worked intermittently. i figured this along with years of oil build up gunked up the fan so i boiled two pots of water hoping the steam would help to dissolve some of that.

it's working ok now going on two days now! lol know on wood! (mdf)
buckosean  
#5 Posted : Sunday, September 14, 2014 3:44:12 PM(UTC)
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buckosean

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Gave it a good couple of bangs, and vent worked again. Problem started when I had multiple burners on and severely overheated the appliance. Hope this is a long term fix:)
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