Tim Babcock Posted November 2, 2022 Share Posted November 2, 2022 This is for the AVV GE fan I am working on. When I bought it it ran on all three speeds but it ran the same speed. I thought because the wiring was replaced on the line in it was maybe a bypass of the speed coil. But after getting it wired up its not. I do not know how to actually test a speed coil, I have been told its not possible with a multimeter alone. But if I set the multimeter to Ohms and I hold one probe to the high speed and then the other to the medium speed I get a reading, and then to the slow speed I get a reading. I would think that if the coil is not broken and making contact it should work. Its only a two wire head so not much to really worry about that way. There just does not seem to be any room for me to mess up the wiring. Line in connection is High and goes strait to the head. Medium runs through the coil, and slow runs through the coil. So I must be a bad coil. Quote Link to comment Share on other sites More sharing options...
Mark Olson Posted November 2, 2022 Share Posted November 2, 2022 Quote Link to comment Share on other sites More sharing options...
Tim Babcock Posted November 2, 2022 Author Share Posted November 2, 2022 So I get on my multimeter AtoB .9 CtoB 2.3 and AtoC3.0 So very close. Is it possible, that if I have no fan on the motor its hard to tell the speed difference? Most times I can hear the RPM difference. Thanks for the help. Quote Link to comment Share on other sites More sharing options...
Mark Olson Posted November 2, 2022 Share Posted November 2, 2022 No blade on the motor will show very little speed difference 1 Quote Link to comment Share on other sites More sharing options...
Tim Babcock Posted November 2, 2022 Author Share Posted November 2, 2022 I put the blade on and it does not sound like there is any difference. I put the amp meter on it draws .85 on high .85 on medium and .85 on low. Quote Link to comment Share on other sites More sharing options...
Mark Olson Posted November 2, 2022 Share Posted November 2, 2022 Your coil may be shorting under load. Is there any ohm reading between any coil lead and the coil stack? Quote Link to comment Share on other sites More sharing options...
Tim Babcock Posted November 2, 2022 Author Share Posted November 2, 2022 I will check that. I have to take it out again but I may wait till I take it to Harrison on Friday. Quote Link to comment Share on other sites More sharing options...
Tim Babcock Posted November 3, 2022 Author Share Posted November 3, 2022 I checked and no bleed to the Laminate stack. The coil has not been messed with. Its strange. Quote Link to comment Share on other sites More sharing options...
Mark Olson Posted November 3, 2022 Share Posted November 3, 2022 IDK.... one of those "need my hands on it" kind of things to figure it out. There may be a mismatch of parts. Quote Link to comment Share on other sites More sharing options...
Michael Rathberger Posted November 3, 2022 Share Posted November 3, 2022 I remember a post by David H. A long time ago. He could not get speeds till he cleaned all the contacting parts. These were soldered connections though but you may want to try... Quote Link to comment Share on other sites More sharing options...
Tim Babcock Posted November 4, 2022 Author Share Posted November 4, 2022 13 hours ago, Michael Rathberger said: I remember a post by David H. A long time ago. He could not get speeds till he cleaned all the contacting parts. These were soldered connections though but you may want to try... I can check the readings through the brass screw heads that connect to the switch lever. If it reads good there I don't think its a connection issue. But I am taking it to Harrison today and maybe someone can figure it out. Quote Link to comment Share on other sites More sharing options...
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