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ApplianceGuru.com: The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > GE Downdraft Vent Model JVB94SH1SS |
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| Moderated by: BrntToast, RegUS_PatOff, appl.tech.29501 | Search Our Sites for More Info! | Page: 1 2   |
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| GE Downdraft Vent Model JVB94SH1SS | Rate Topic |
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| Posted: Thu Sep 30th, 2010 04:40 pm |
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1st Post |
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mrosec Grasshopper
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I have a GE Cooktop with Downdraft Vent Model JVB94SH1SS that is stuck in the up position. The fan is working fine but the thing will not return to the down position. I have it taken apart to the point that I can see the gear motor and control board. Now I don't know how to proceed. I am assuming I need to replace either the switch or the control board but am not sure how to determine which. I have a multitester but was afraid of doing something wrong and ruining a perfectly good control board. Thanks!!!
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| Posted: Fri Oct 1st, 2010 05:44 am |
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2nd Post |
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Samurai Appliance Repair Man Fermented Grand Master of Appliantology 
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Certain serial numbers had problems with the gear motor. Post your serial number and will look it up to see if yours is one of the included units.
____________________ To ask a question, use our new forums==> http://appliantology.org 365-Day No-Hassle Return Policy on all parts purchased through this site, even electrical parts that have been installed! |
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| Posted: Fri Oct 1st, 2010 04:47 pm |
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3rd Post |
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mrosec Grasshopper
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Thanks! The serial number is LH802335C.
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| Posted: Fri Oct 1st, 2010 10:13 pm |
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4th Post |
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Samurai Appliance Repair Man Fermented Grand Master of Appliantology
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Yep, yours is one of 'em. Here's the part link to the new gear motor... http://www.repairclinic.com/SSPartDetail.aspx?s=t-WB26X5101-%3d%3di254152&PartID=254152
____________________ To ask a question, use our new forums==> http://appliantology.org 365-Day No-Hassle Return Policy on all parts purchased through this site, even electrical parts that have been installed! |
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| Posted: Sat Oct 2nd, 2010 05:16 pm |
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5th Post |
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mrosec Grasshopper
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OK...I will order that part. Thanks for the link! That makes it easy! Before I do that, I think I should mention a couple things because with your expertise, you will be able to tell me if I have something else going on. 1) There is absolutely no response when I push the raise/lower button. No sound or sign that anything is even trying to work. 2) Right before this thing stopped working, it went crazy. It was in the up position and after I pushed the button to lower it, it went down and then came back up and went down and up and down and up.....I had to unplug it to make it stop. When I plugged it back in it was doing the same thing. I waited for a day or two and when I plugged it back in it was up and would not lower. I know, I should have unplugged it when it was down......hindsight! But, on the other hand, since the fan still worked, I found myself glad it was stuck raised up. Anyway, I don't know if that is at all significant but thought I should mention it just in case.....if I need to order a part(s) other than the gear motor I can maybe get them coming at the same time. Thanks!!!
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| Posted: Sat Oct 2nd, 2010 06:32 pm |
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6th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology 
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may be just a bad Switch on the Gear Motor Box are there some parts numbers on it ?
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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| Posted: Sat Oct 2nd, 2010 07:58 pm |
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7th Post |
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mrosec Grasshopper
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No part numbers. It just says "omron", "made in Japan", "NC", "NO" and has the numbers 1,2 and 3. I get a 0ohm reading on the gear motor. Can I test the raise/lower limit switch? Would I just test it for continuity?
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| Posted: Sat Oct 2nd, 2010 08:16 pm |
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8th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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mrosec wrote: I get a 0ohm reading on the gear motor. Can I test the raise/lower limit switch? Would I just test it for continuity? are you using a digital OHM meter on the 200 OHM scale ? Can I test the raise/lower limit switch? Would I just test it for continuity? if you can turn the Gear Motor so that it operates the Switch in both positions .. No part numbers. It just says "omron", "made in Japan", "NC", "NO" and has the numbers 1,2 and 3. if you can remove it and check for numbers on the other side.. you could also then check continuity Do you have a wiring diagram you could scan & upload ?
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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| Posted: Sat Oct 2nd, 2010 09:14 pm |
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9th Post |
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mrosec Grasshopper
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Yes it is a digital multitester. I tested at 20 and 200 OHMS and got a "0" on both. I turned the gear motor both directions and nothing happened. Yesterday though I turned it in one direction and the vent returned to the down position. I figured turning the motor had caused something to disengage and gravity had brought it down. I have the wiring diagram and have scanned it but am still somewhat technologically challenged and don't know how to upload.
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| Posted: Sat Oct 2nd, 2010 09:30 pm |
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10th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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grasshoppers can't upload here ... upload it somewhere http://www.imageshack.us/ then post the link here
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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| Posted: Sat Oct 2nd, 2010 10:26 pm |
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11th Post |
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mrosec Grasshopper
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Got it! I uploaded to ImageShack. There was a "link" and "direct link" and I wasn't sure which would or would not work so here are both of them. http://yfrog.com/msdowndraftwiringdiagramj http://img820.imageshack.us/img820/2810/downdraftwiringdiagram.jpg Thanks!
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| Posted: Sat Oct 2nd, 2010 10:57 pm |
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12th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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If you hold the push the Button, the Motor should raise, then lower, contiuously. The Limit Switch just makes it continue to the upper/lower position without holding the Button. It would seem that the Control Board is bad. You could test the Motor and Limit Switch by momentarily shorting across the Limit Switch (Black and Blue wires) The Motor should run to the opposite limit (up or down). 
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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| Posted: Sun Oct 3rd, 2010 02:17 am |
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13th Post |
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mrosec Grasshopper
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Sorry for the delay in response.....had to take a kiddo to his baseball game. When I shorted the blue and black wires, the motor ran to the opposite limit. So, if I am understanding correctly, this means my motor and limit swith is fine. So now I need to consider the control board or is it possible the switch membrane has gone bad? When I check for continuity on the control board along the lines everything seems to check out. Is there a way for me to check the ribbon switch to make sure it hasn't shorted out or is that even a possibility?
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| Posted: Sun Oct 3rd, 2010 04:11 am |
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14th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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If the Push Switch or Ribbon Cable was shorted, the Motor would run continuously. click on picture 
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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| Posted: Sun Oct 3rd, 2010 04:16 am |
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15th Post |
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Samurai Appliance Repair Man Fermented Grand Master of Appliantology
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Nice shootin', Reg! 
____________________ To ask a question, use our new forums==> http://appliantology.org 365-Day No-Hassle Return Policy on all parts purchased through this site, even electrical parts that have been installed! |
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| Posted: Sun Oct 3rd, 2010 04:13 pm |
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16th Post |
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mrosec Grasshopper
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So, the push switch is fine because the motor is not running continuously. The motor and limit switch are good too because they worked when I shorted across the limit switch. That just leaves the control board which I already have exposed and you already sent me the link to order! How much easier can it get!?! Thanks for your expert advice! Can't wait to get the new control board in and have this thing working right! I'll let you all know.
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| Posted: Sun Oct 10th, 2010 05:11 pm |
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17th Post |
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mrosec Grasshopper
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I received the new control board yesterday and installed it today. I guess the control board wasn't what I needed because there is still no response from the downdraft vent. Not sure what to do now. We are hosting a Halloween party in two weeks so I have got to get this fixed! I know you said the motor would run continuously if there was a short in the push switch or ribbon cable but is it possible for the motor to not run at all if there is a problem with them? Thanks in advance for your help!!! We are hosting a Halloween party in two weeks and I have got to get this fixed!
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| Posted: Mon Oct 11th, 2010 01:00 am |
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18th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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if the Push Switch is not working at all .. did you test it ?
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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| Posted: Mon Oct 11th, 2010 01:06 am |
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19th Post |
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mrosec Grasshopper
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No....I don't have it taken apart to that point and I think I misunderstood a prior post that it couldn't be the push switch. Guess I will have to take the whole thing out entirely. Do I just check for continuity?
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| Posted: Mon Oct 11th, 2010 03:05 am |
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20th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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mrosec wrote: So, the push switch is fine because the motor is not running continuously.... so... the Push Switch is not shorted because the motor is not running continuously Push Switch should have continuity while being pushed can be tested at the wire connections at the Control Board Any part ordered from RepairClinic can be returned in original condition within 30 days for a refund (less shipping).
____________________ The new repair forums==> http://appliantology.org RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” http://www.youtube.com/watch?v=-EBiLyYXMiA |
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