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Nesco coffee roaster fan won't turn on
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mjaquillard
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Joined: 1 Jan 2014
Posts: 2
Location: Apex
Expertise: I love coffee

Posted Wed Jan 1, 2014, 1:46pm
Subject: Nesco coffee roaster fan won't turn on
 

Hi everyone,

My Nesco roaster just failed to start up after multiple years of use. The circuit that it is plugged into tripped the other day while I was running it, but I did not notice anything wrong w/ the roaster until I just tried to start it up. The display will work fine, but when I hit start, the fan and auger do not start. It does get hot however. Not sure if the same as this problem or not: http://coffeegeek.com/forums/coffee/homeroast/385006 . I would think if that fuse was bad, it would not get hot either. Any suggestions?
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PJK
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PJK
Joined: 21 Jan 2002
Posts: 2,314
Location: Shingle Springs CA
Expertise: I love coffee

Espresso: Rancillo Silvia, Tonic...
Grinder: Modified Rocky, Elma side...
Vac Pot: Old Silex
Drip: Melitta BCM 4  +Some old...
Roaster: Hottop, Modified Z&D,...
Posted Wed Jan 1, 2014, 2:25pm
Subject: Re: Nesco coffee roaster fan won't turn on
 

Hi mjaquillard,

Welcome to the forum.

I will give you some steps to start, but I have to say be very careful. 120 Volts can kill you.  If you did not say it is getting hot I would first suspect the thermal fuse near the top of the cat but since it is hot the fuse is likely good.

First take off the bottom cover to see  if the motor is seized.  Turn the small belt pulley by hand to see if the motor shaft is free. If the motor shaft turns freely look on the board for the terminals marked Mot. I think that is correct but it has been awhile since I looked. At any rate find the leads going to the motor.  Put a DC voltmeter across the terminals and turn the machine on.  You should see about 35 Volts DC. If you get that, the motor is at fault. I could be worn brushes but it will be a trick to non destructively get the motor apart and together again. If you don't get the DC voltage the fault is on the board. At on time I traced out that part of the circuit and drew a schemo. I think I can find it. If you don't feel confident troubleshooting on the component level, you may have to replace the board. I have some parts machines around so we can talk after you do the tests. You can't even get a belt from Nesco.  They will service the machines I believe.

Be very careful of the flex-board cable going to the display. It will break if you look at it funny.

I think Z&D and Nesco roasters are pretty good but I got fed up with having to scrounge for heating elements and went to a Hottop.  Those guys have their parts online. You can just click on any part and put it in the shopping cart.

Phil

mjaquillard Said:

Hi everyone,

My Nesco roaster just failed to start up after multiple years of use. The circuit that it is plugged into tripped the other day while I was running it, but I did not notice anything wrong w/ the roaster until I just tried to start it up. The display will work fine, but when I hit start, the fan and auger do not start. It does get hot however. Not sure if the same as this problem or not: http://coffeegeek.com/forums/coffee/homeroast/385006 . I would think if that fuse was bad, it would not get hot either. Any suggestions?

Posted January 1, 2014 link


 
Philip J. Keleshian
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mjaquillard
Senior Member


Joined: 1 Jan 2014
Posts: 2
Location: Apex
Expertise: I love coffee

Posted Wed Jan 1, 2014, 5:35pm
Subject: Re: Nesco coffee roaster fan won't turn on
 

Thanks for the reply! I'll see what I find...
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