Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-14-2011, 08:42 PM   #16
Member
 
Join Date: Sep 2010
Posts: 453
Rewards Points: 252
Default

variable speed trane blower motor


Just to be clear, in my earlier post, the Bob Reynolds 'seminar' just meant read the attached link. Look for the Bob Reynolds explanation of the thermistor issue.

I can't vouch for amazingkeys site either because I found all this out after the new ECM head had been installed. But I would have tried it if I had known.

http://www.amazingkeys.com/products/...rch=thermistor

diyorpay is offline   Reply With Quote
Old 09-16-2011, 02:19 AM   #17
Newbie
 
Join Date: Sep 2011
Location: Gainesville, FL - the SWAMP - home of the GATORS
Posts: 9
Rewards Points: 10
Default

variable speed trane blower motor


I first was looking on ebay for the techmate, and then I went to the website and saw they were only $50 new, so sounds good to me. It looks like it plugs right into the module, so I'm assuming it's going to test that also.
I took the blower out and the module off and inspected the boards inside and couldn't find any obvious hot spots or damage, so I guess my best bet is to order the techmate and put the blower back in so I can test it when the tool arrives in a couple days
the thermistor was black on my unit like the photos you sent me, but it doesn't appear burnt.
I'll try and post a pic of it at the photobucket site I used earlier:

http://s1105.photobucket.com/albums/h351/afn63537/

if I can figure out how to get back there! got it

I'll see if I can post them here like you did, too. doesn't look like that's working, I tried to put one at the end of this and it's just showing a little icon there.

humidity is picking up here (I'm in Florida, go figure)so I've got to get this thing happy soon, or the wife won't be!!
thanks a bunch
afn63537 is offline   Reply With Quote
Old 09-16-2011, 12:25 PM   #18
Newbie
 
Join Date: Sep 2011
Location: Gainesville, FL - the SWAMP - home of the GATORS
Posts: 9
Rewards Points: 10
Default

variable speed trane blower motor


I read where someone jumped past the thermistor. Seems like I could use that to see if it was the cause of the problem of the motor not starting up and just making that bumping sound and moving back and forth with each bump sound.
I'm considering that test, so besides the standard caution warnings so as not to get hurt or burn down the place, any reason not to?

thanks all
afn63537 is offline   Reply With Quote
Old 09-20-2011, 01:32 PM   #19
Newbie
 
Join Date: Sep 2011
Location: Gainesville, FL - the SWAMP - home of the GATORS
Posts: 9
Rewards Points: 10
Default

variable speed trane blower motor


It would seem that if the thermistor is the problem, the motor would not move at all, and also not bump back and forth the way it's doing now.

Anyone ever had one go out and still allow current to flow?

thanks, doug
afn63537 is offline   Reply With Quote
Old 09-20-2011, 01:57 PM   #20
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Rewards Points: 500
Default

variable speed trane blower motor


Replace the thermistor. Radio Shack may have it.
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 09-20-2011, 05:50 PM   #21
Member
 
Join Date: Aug 2011
Posts: 729
Rewards Points: 500
Default

variable speed trane blower motor


Ohhh..the tech mate tester..its not really the best tool for VS motors.
Zebra makes a far superior tester.
Master of Cold is offline   Reply With Quote
Old 09-20-2011, 06:01 PM   #22
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Rewards Points: 500
Default

variable speed trane blower motor


Quote:
Originally Posted by Master of Cold View Post
Ohhh..the tech mate tester..its not really the best tool for VS motors.
Zebra makes a far superior tester.
I just got the TecMate Pro
Attached Thumbnails
variable speed trane blower motor-tecmatepro.jpg  
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 09-20-2011, 06:24 PM   #23
Newbie
 
Join Date: Sep 2011
Location: Gainesville, FL - the SWAMP - home of the GATORS
Posts: 9
Rewards Points: 10
Default

variable speed trane blower motor


You'll have to let us know how that tester works.

Does it basically replace the main board to test the motor?

I didn't see the 16 wire connector in the photo, though, so do you need to buy an adapter or make one up to use it?

I looked up the zebra, and it seems to be about 5 times as much to buy it, at least it was about 260 on ebay in a buy it now.

thanks
afn63537 is offline   Reply With Quote
Old 09-20-2011, 06:43 PM   #24
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Rewards Points: 500
Default

variable speed trane blower motor


You don't need the extra adapter. TecMate Pro has 16 and 4 pins connector.
Attached Thumbnails
variable speed trane blower motor-tecmatepro.jpg  
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 01-13-2013, 05:19 PM   #25
Newbie
 
Join Date: Jan 2013
Posts: 13
Rewards Points: 10
Thumbs up

variable speed trane blower motor


The bob Reynolds write above is spot on!! After not getting or finding a tech this weekend with a tester to diagnosis my ECM variable speed motor, I found this thread and took apart the module from the end of the blower motor. I was surprised to find a burned out thermistor described in this thread. The wire on one side is broken completely. I failed to clean my Trane freedom 80 comfort R filters for 12 mos. it was packed with dust. Dumb, yes. 12 yr old unit I had installed and I've gotten lazy cleaning the electronic Honeywell filters and two prefilters regularly.

Can't believe I caused this problem, but with a $1.77 thermistor part (In-Rush Current Limiter (ICL) by Ametherm) I just ordered from Digi-Key Corporation (SL22 1R020), I should be back in business on Tue night. A $56 overnight shipping fee is worth it to me. In fact, I bought 3. I will be finding a reputable servicer who can handle small soldering jobs. Not even sure my std solder or technique would suffice. This part matches my OE thermistor's brand and labeling using the same 20amp max steady state, 1.0 ohm (R @ 25degC), and .015 ohm (R @ Current) ratings.

Luckily the board is solid and intact so no damage to speak of and should make it easy to slip in the new thermistor, bend over the wires, and solder it correctly.

Original issue for me was a dead blower motor yet a 4 flash error on the IFC, indicating a 'high limit switch' (being tripped). My old limit switch seemed to be going open lazily so I replaced that $45 part but to no avail. Still no blower motor. After thinking more, decided that the limit switch was being tripped because of the inherent high temps in the burner area. Duhhhhhhhh...I then removed the mother board, the IFC if you will, but found no burn marks indicating any issues with that board. I confirmed I have 120V going to motor and 24v coming back. My motor is dead cold though. Not even a trace of an attempt to spin like some folks here speak of.

Fingers crossed on the thermistor. Will report back with pictures...

Last edited by punchycool; 01-13-2013 at 07:54 PM. Reason: Had to change my order; bought wrong SG379 part ID'd here instead of the correct one I list above for my particular unit.
punchycool is offline   Reply With Quote
Old 01-13-2013, 05:31 PM   #26
Newbie
 
Join Date: Jan 2013
Posts: 13
Rewards Points: 10
Default

variable speed trane blower motor


...from previous thread...funny thing is that I forgot that exactly 5 yrs ago Dec 2007, my extended warranty through my local installer paid for a blower motor module, for the same concern. That was a $780 bill that cost me just a $50 deductible.

And eight yrs ago, a then 2 yr old unit(nov 2004), i had the same complaint and under the original warranty, another blower motor module was replaced by my installer.

Getting old and totally forgot about that correlation. I was out traveling for business A LOT and so my wife had taken care of these concerns:-). I wonder if it was just another thermistor that popped both times. We will never know. Less the past 12 mos, I've cleaned my four filters on schedule every 6 mos. I don't blame my local tech/installer at all, but Trane...is this a common faulty component??? Maybe I just need to clean the filters every quarter instead......hmmmm. At the end of the day, it's my fault.

Yes, I should have kept renewing my warranty. Lesson learned. I figured it was money down the drain in 2010 and stopped it...funny how those things bite.


Last edited by punchycool; 01-13-2013 at 07:57 PM.
punchycool is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Blower Motor Wiring reversed? HVACMac HVAC 60 08-30-2011 02:10 PM
Blower motor: Emerson to GE threeonesix HVAC 12 08-25-2011 03:59 PM
comfortmaker furnace; i've done the hard part by taking the blower motor out Hurell HVAC 2 06-05-2010 01:03 PM
Oiling Trane XB1000 AC Fan Motor Build HVAC 5 06-19-2009 04:05 PM
variable speed motor for hvac Unregistered HVAC 2 01-14-2005 11:58 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.