Welcome to Enertech University, online training by Enertech. This video is designed to help technicians troubleshoot an ECM motor if a failed motor is suspected. Remember - a failed component is the symptom, not the cause of the failure.
I bought two electronic testers for the 16 pin and the the other X13. I just plug them to the 24 volt and if it runs we know the motor is good. Have to do some of the checking you reccomended here. Good job on the video.
One of my AC units quit working. I troubleshot the blower motor and I’m having the back and forth rocking but it never starts. All my voltages are good. I ohmed out the blower and am getting 11 ohms at each wire. I didn’t ohm to ground. In the video he mentioned replacing the blower motor but doesn’t specify whether you should replace the blower only or the entire assembly, motor and ecm. Does anyone know what I should do?
A squirrel cage blower is not a positive displacement type air pump. Ergo, it should not draw more current due to duct restriction, but should draw less as it is doing less work, moving less air. Put an ammeter on the blower motor and restrict its duct...see what happens.
hi, my ge ecm 2.3 1/2 hp motor is continuously running on a low speed, when we turn off the ac, it switches from normal speed to low speed and keeps running, any help would be appreciated.
After replacing the module thermister, a year later my main blower motor (GE 1/2 hp 08/22/00 CNO2 011DH7) is making a intermittent high pitched whine (g#5 note) when on first stage. I "think" it's related to the module, but not sure. Anyone?
Are there any more details you can provide regarding motor rocking back and forth? Is it the only course of action to replace both the fan control module and the fan too?
We would be happy to look into this. Please provide your contact information and unit serial number to customerrelations@enertechusa.com so that we can determine the best way to address your questions.
Great video! A question about rocking back and forth and NOT being the module?... My blower motor will, once in a while, continue to rock back and forth without turning on completely. This has caused my coils to freeze and my limit switch to pop while in heat. Most times, however, the blower will turn on completely! When calling for fan only, I receive 24 volts from the thermostat at "R" and "G". However, when going from the 16 pin header on the control board (ECM 2.3) the "G" pin (#15) only sends 15 volts to the motor module. The harness is fine as it shows continuity for all lines. Is the 15 volts that leaves the control board and goes to the motor module the issue causing my blower motor to sometimes stay rocking back and forth without turning on completely? Or would you assume it's the motor module and the 15 volts out of the control board is not the problem?
Hi there! Thanks for the comment. When the blower wheel rocks back and forth, the module is trying to find proper direction. If it continues to do that then the module will need to be replaced. As far as the voltages go, if there is at least 14 volts to the module then the module will recognize that as a call and should start the motor. Again, if the module rocks back and forth that is not a voltage issue but a module issue.
@@EnertechUniversity Great! Thanks. Any videos on repairing ECM modules or what to look for? I've seen a couple talking about swapping out thermistors but mine does not look damaged.
I checked the motor with an ohm meter at the three pin connection and everything checked out good, you say if it checks out, the motor is good, Yet when I hook everything back together the motor rocks back and forth but does not spin you say the motor is bad, which conflicts with the ohms test, Could you please advise if further tests can be performed to help diagnose the problem, Thank you.
+Pee Dee If the motor is rocking back and forth, then the module is looking for direction. If it continues to rock and not run, it cannot find the proper direction due to an issue with the module. The module is bad and will need to be replaced. We do not replace just the module. We will need to replace the motor and the module.
+Technical Services I had the same problem December 2013 and replaced the module but not the motor, could this be the reason why the module failed, I have read other posts on line, advising that the module can be replaced if the motor checks out good, Thanks
+Pee Dee We used to be able to replace the module or the motor depending on which was bad. At this time we cannot get just the motor or just the module. They now come as a pair. It should not affect it if one was replaced and not the other. The only reason we change both is that it is how they are sold to us.Thanks!
The board sends a 24v signal to the thermostat then just like a light switch it routes the 24v from the board through the thermostat back to the corresponding terminal on the board.
16-pin connector may have various definitions, I wonder. I followed this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-lKsIgjEJDII.html made a set (a copy of TecMate Tool), worked for some ECM, but when it comes to Carrier infiniti, it didn't move. Carrier actually using only 4 out of 16 wires. 1+15 in this vid works. Now you show us another version of tester, 3-button tester. :-D If we can get the wiring of the 3-button tester we can make one for our own. Thanks
