Check out some similar questions!

jhubb · Aug 30, 2009, 01:54 PM

OK I re-wired the motor per the diagram you sent. Blower will come on, run for a few minutes with tstat set to On. Any ideas? I have rechecked the wiring a dozen times, and I have some training in elecetrical, it looks correct.

HVACtechsnj · Aug 30, 2009, 02:36 PM

Not to sound silly does it have a run capacitor and if it does is it the correct size. On the label and box of the new motor it will tell you xxmfd cap.

jhubb · Aug 30, 2009, 03:12 PM

yes I bought the cap and motor at same time same place, and it all matches up per motor requirements. I was trying to pretest the fan earlier without putting it back in unit, and it would shut off after a coule minutes. Then I read it needed some back pressure, so I installed it back as normal, reran it- it ran for maybe 4 minutes, was still runinng when the closeset smoke alarm went off, so shut it down. No smoke, faint smell, shut it off right away. Something it definatley off somewhere, I just can't seem to find it. It comes on and runs, but I don tknow why smoke alarm went off now.. it is wired exactly as diagram I printed from first answer here. It is 3 speed variable, set as before. We did go from 4 speed to 3 speed motor, and wired per downloaded diagram.

HVACtechsnj · Aug 30, 2009, 04:08 PM

Ok I just read your first post and trying to catch up on the issue. With water entering the system other components may be shorted out. Also with the manual that I was linked to it seemed as though it is a 208/230 volt motor. I assume they gave you the correct voltage motor. On the new motor is there a plug in adapter near the motor itself? Most of the time it is a yellow and purple connection that can be reversed for correct direction of the motor to run. If so make sure the air is flowing the right way.

jhubb · Aug 30, 2009, 04:17 PM

Yes and yes. Fan is blowing right direction, and it runs well, can't see where its overheating, or why the shut off . No part left to replace, have changed wiring couple of times, recheked to the diagram sent. Not popping breaker inside, and tstat working right. It was 4 days before new motor went in, and I dried it all out with air compressor the first day. 240v in and out of unit.

HVACtechsnj · Aug 30, 2009, 05:04 PM

With all that you have done and checked by the off chance you may have got a bad motor for the replacement. I am out of answers at this time. You have replaced checked and rechecked everything that I can think of. Maybe someone else here may have a better answer, I will post back if I think of anything else. Sorry I could not help.

hvac1000 · Aug 30, 2009, 05:49 PM

It seems we have to posts on the same subject from the same person. LOL

https://www.askmehelpdesk.com/heatin...te-391477.html

jhubb · Aug 30, 2009, 06:15 PM

Sorry that's my fault, I answered the first post, then thought that might be wrong for you to see my reply, so made new post.. then I saw that wasn't right thing to do.. LOL, I know better now.. only thing I know to do at this point is take cap and motor back to the supplier with the wiring diagramm you gave me- and thanks very much for that! I printed it all out, and start asking some questions to them.. if anyone reads this and has run into something similar please share!
Thanks to you both for advice. I have learned a lot along the way on this project.

hvac1000 · Aug 30, 2009, 09:04 PM

Post back with your results. It is possible you have the wrong voltage motor or a few other things. It is frustrating on your end for sure.