How to Replace a Trane Blower Motor – Part 1

allthumbsdiy-images-how-to-replace-trane-blower-motor-a10-header2-fl

How to Replace a Trane Blower Motor is a multi-part series article, broken into Part 1 and Part 2.

 

ABSTRACT

Part I of the article series contains information on identifying the blower motor problem, purchasing a replacement part, gathering necessary tools and finally disassembling the Trane Air Handler / Furnace for removal of the blower motor.

BACKGROUND

My Trane Air Conditioning / Central Heat has been solid since the installation date (back in 1997 I believe). Of course with any mechanical setup, components wear out over a period of time and that is exactly what happened when I started to hear high pitched sound (sort of like metal-on-metal grinding noise) whenever the cooling / heat fan kicked in.

I researched it online after looking inside my furnace / air handler and finding metal shavings near the blower. I knew the motor was sealed (meaning I could not periodically add oil to the bearing) and had been wondering about when it would fail on me.

So I called my trusty HVAC place and asked a salesperson about a solution and he suggested that I replace the blower motor. The replacement motor made by Dayton was only $140 or so but the installation fee was fairly high at $340 so I decided to tackle the job myself.

This particular salesperson was very professional and even gave me some tips (like making sure to salvage the motor mounting bracket as it was very expensive to find one). He also recommended that I replace the capacitor at the same time as capacitors lose their efficiencies over time. The cost for Dayton replacement capacitor was only $8 extra so I bought one as recommended.

Item Old New
Blower Motor GE MotorsP01
924883007504 1400
1/3 HP, MOD 5KCP39JG P752 S
Cp 5.00 / 370, RPM 1075/4SPD
Dayton 4M098G
1/3 HP
Cp 5.00 MFD / 370 VAC, RPM 1075 / 3SPD
Capacitor GE
Z97F9239
5uF, 370 VAC 50/60 Hz
A10000AFC 92-43Z572
D137452P03
Dayton
5uF 370VAC 50/60 Hz
MPP2505370J 4506W
E236128

 

REQUIRED TOOLS AND MATERIALS

  • Replacement blower motor
  • New capacitor
  • Hammer
  • Wire cutter / stripper
  • Wire nuts
  • Electrical tape
  • Mechanics Ratchet + sockets + extender
  • Work glove
  • Heavy duty rubber gloves
  • Digital camera

STEP-BY-STEP REPLACEMENT GUIDE

  1. Turn off air conditioning / heat from the thermostat.
  2. Remove battery from the thermostat (or disconnect thermostat altogether).
  3. Turn off power at the main electric panel.
  4. Turn off the emergency HVAC shutoff switch
  5. Remove top and bottom cover panels on the air handler / furnace unit (fig.5.1).
  6. Take detail pictures of where everything is located, including wiring setup from the motor, capacitor and controller (fig.5.2).
  7. WARNING – CAPACITOR WILL BE HIGHLY CHARGED EVEN WHEN THE POWER IS TURNED OFF. DO NOT CROSS CONNECT OR TOUCH TERMINALS
  8. Remove top 2 metal screws holding the door switch with 5/16” hex wrench (fig.5.3, fig.5.4).
  9. Remove bottom 2 metal screws holding the controller with 5/16” hex wrench
  10. allthumbsdiy-images-how-to-replace-trane-blower-motor-a12-cover-panels-fl

    fig.5.1

    allthumbsdiy-images-how-to-replace-trane-blower-motor-a20-inside-layout2-fl

    fig.5.2

    allthumbsdiy-images-how-to-replace-trane-blower-motor-a30-remove-wiring-fl

    fig,5.3

    allthumbsdiy-images-how-to-replace-trane-blower-motor-a50-remove-door-safety-switch-2-fl

    fig.5.4

  11. Slide out the controller. Attached wires may be short so you may need to rest it on a box of some sort next to the air handler / furnace (fig.5.5).
  12. Take another set of pictures, taking special note on how capacitor wires are attached (fig.5.6).
  13. Wear a heavy duty rubber glove to remove the capacitor by first sliding off the rubber boot the disconnecting the wires (fig.5.7). Set aside the old capacitor – you can either manually discharge it or let it sit around for awhile.
  14. Remove two screws holding the fan shroud using a 3/8” socket (fig.5.8).
allthumbsdiy-images-how-to-replace-trane-blower-motor-a55-remove-controller-fl

fig.5.5

allthumbsdiy-images-how-to-replace-trane-blower-motor-a60-motor-shroud-exposed-fl

fig.5.6

allthumbsdiy-images-how-to-replace-trane-blower-motor-a65-remove-capacitor-fl

fig.5.7

allthumbsdiy-images-how-to-replace-trane-blower-motor-a70-remove-motor-shroud-fl

fig.5.8

 
NEXT >> How to Replace a Trane Blower Motor – Part 2
 

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    Comments

    1. Nick Fisher says

      As I type this, I am drinking a beer next to my perfectly functioning furnace. Last night it was 47 degrees (F) in my house. I just completed the blower motor (and capacitor) replacement and can’t thank you enough for taking the time to write this up. It’s people like you that keep people like me enthusiastic about DIY!

    2. kevin says

      @Nick-

      Thanks for letting me know and I am glad your furnace is up and running.

      Great job and enjoy your well-deserved beer!

      Kevin

    3. jack nichols says

      Thanks for the information. Without it I might not have had the confidence to do the job. Thank You.

    4. K. says

      By chance is your Trane XL80 from the early 1990’s with model number TUD120R954A1? It looks exactly the same as mine so I’m wondering if I should get the same motor. Thanks.

    5. K. says

      Also, my capacitor says it is 15.0 MFD instead of 5.0. I believe my capacitor was changed in 2010 so it’s not original to the furnace. Does yours say 15.0 or 5.0?

    6. K. says

      I think I found my answer. The capacitor should be 5.0 because it should always match the specifications of the motor you are replacing. The Grainger website indicates that 2MDV4 is the correct capacitor for the Dayton 4M098G motor.

    7. kevin says

      @k
      The original GE capacitor that came with my unit is Part No. Z97F9239. According to that label, it has 5 MicroFarads.

      The replacement Dayton one has 5uf but with +-5% variance.

      Here is a picture of both (http://allthumbsdiy.com/wp-content/uploads/2015/02/allthumbsdiy-images-hvac-capacitor-fl.jpg).

      For this instance, I would not purchase it online. Instead, visit some local HVAC companies to buy them (and ask why someone would replace 5uf with 15uf capacitor).

      Has your unit been running okay?

    8. K. says

      Yes, I’m planning to stop by the Grainger’s close by to get more information.

      My blower motor or cage makes a loud clanging sound when it starts up.

      youtube.com/watch?v=lbDuHVw9ko0

      Your post is a great asset for others and your write-up and pictures are impeccable. Thank you!

    9. K. says

      Hi again. I’m about to tackle the job tomorrow. Did you have to balance the fan to avoid hitting the shroud? If so, how did you do it?

      I’m thinking that’s my problem rather than a new motor…. based on the sound it makes at start up. See previous youtube video.

    10. K. says

      Hi, just wanted to say I completed the job last week to swap out the motor and old blower fan wheel (Model # WHL03116 or WHL3116).

      The motor and capacitor I replaced seemed fairly new as I believe they were just replaced in 2010. After putting the new motor on the old fan wheel, there was still a noise coming from the wheel. So I decided to replace the fan wheel as well. I suspect that the fan wheel may have been off-balance or the blades loose in some way so as to cause the premature failure of the 5-year old motor.

      I had significant trouble getting the old blower wheel off the old motor. I used oil on the shaft and tried to use a hammer but I only got so far. I had to buy a blower fan removal tool.

      That was the only obstacle I encountered.

      Thank you for your guidance and this write-up.

    11. kevin says

      @agentchu-

      thank you for the update and sharing your story! great job!!

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