Question about GE Profile Harmony DPGT750EC Electric Dryer

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The diagnostics say there is nothing wrong with my dryer but...

The diagnostics say there is nothing wrong with my dryer, but it will not blow air out of the back of the dryer. I have taken apart the vent and it is not clogged. Do you have any idea what I can do now?

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  • MissMichelle Aug 20, 2007

    Sorry, I forgot to say this is a GE Profile Harmony Dryer, Model # DPGT750EC1PL.

  • MissMichelle Aug 21, 2007

    Absolutely up for anything at this point. According to GE the problem is not under warranty. Today, the blower is actually working. So I am really confused. But, it is running really hot even on the lowest temperature. And the service mode is still showing no problems with my unit. I did both of the tests by pressing help, then holding my cycles and back at the same time, and start/stop and help at the same time. The Electric LQC Test is how have been able to determine when the blower is working and when it is not. The temp is running between 286 and 386. There is something on it called Inlet THD: 167F (when the unit is not running and changes by a degree or 2 periodically), Outlet THD: 109F (when the unit is not running and changes by a degree or 2 periodically), Mositure: 4.92, Input (V): 60, Memory: ok, Com Data: ok. I will go and ohm the inverter board and get back with you on that status. Thanks so much for your help. I am so grateful! I am game for anything to fix this dryer.

  • MissMichelle Aug 21, 2007

    By testing the wire I read: Blue 15.1, Red 15.0 to 15.1, Yellow 15.1 also. Is this good? This is higher than the 14.

  • MissMichelle Aug 21, 2007

    Correction to the Temp on the dryer. It is the INLET THD that is running between 286-386. The heating just says ok. No temp is displayed.

  • MissMichelle Aug 22, 2007

    Okay, thanks for the vote of confidence. But it was soley by your great information that I was able to check the ohms. I am deffinitely not afraid to try figure things out! Would you please tell me where the thermistors are and what they look like so I can test these? If these are going bad, what do you do to replace them? Are the thermisters the little plugs inside the lint trap?

  • MissMichelle Aug 26, 2007

    I found the outlet thermostat and with the multi meter it shows no reading, is this normal? Would the thermostat show a reading? The outlet thermistor shows 12.17.

  • MissMichelle Aug 26, 2007

    Yes it works when it wants to and doesn't when it doesn't. That is why when I was checking the Outlet thermistor, I also checked the Outlet Thermostat next to it. The outlet Thermister registered ohms, but the thermistat did not. Is the thermistat suppose to process ohms through it when I use the multi meter? Could it be this thermostat? Would that make the blower stop?



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Michelle, So the drum turns but no venting out the back? This model has a DC motor for the vent, but if it failed, Im surprised that you did not receive an error message. Did you run the service mode? Power on, then press the home key, then help key. Then press the my cycles and back together for 3 seconds. Any error codes should now be displayed. The more icon will be displayed if there are more than 1 error. If you still are not getting an error you can ohm out the blower motor. There should be a 10 pin harness on the inverter board under the consol. The blower motor has the approx. resistance value of 14 ohms between yellow to yellow, red to red and blue to blue. The next step would to be to do some tests on the inverter board. Let me know if you are up to that. Catriver.

Posted on Aug 20, 2007

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  • Ron Marek
    Ron Marek Aug 22, 2007

    Michelle, lets go after the thermistors. On this dryer, if the outlet thermistor is out of range the control board will limit the heater to 60% of it's power. If the inlet thermistor is out of range the board will default to using the inlet thermostat to cycle the heater on and off. The inlet thermistor should ohm out at 2.27 K ohms. The outlet thermistor should ohm at 10K ohms. Sounds like the blower motor is good according to your readings. Sounds like you really know your stuff. Good work, let me know how it is going...Catriver.

  • Ron Marek
    Ron Marek Aug 22, 2007

    PS Michelle, these thermistors can be out of range and the board can fail to give an error on them.

  • Ron Marek
    Ron Marek Aug 22, 2007

    Michelle, let's see if I can attach a photo of this dryer. The inlet thermistor can be accessed from the rear of the dryer. It will have a cover on it. The outlet thermistor is located on the blower housing next to the thermostat. You will have to remove the top, front and drum to access it. I hope you can enlarge this photo, it will give you a good idea. Catriver.

  • Ron Marek
    Ron Marek Aug 26, 2007

    Michelle, the outlet thermostat is located on the blower housing. If it reaches a temp beyond it's maximum rating it will trip and disable the heating function only. This thermostat is resetable. Should trip at about 190 degrees and reset at approx 150. A few degrees either way, no big deal. If you found it open, the unit should not heat at all until it resets. Are you still having problems with the blower not working? The themistor sounds like it's in range. Catriver.

  • Ron Marek
    Ron Marek Aug 26, 2007

    No, the only function it will stop is the heater, whether gas or electric. It will not affect the blower. The fact that the blower motor ohmed out ok, leads me to believe the sporatic problem is in the inverter board. The only thing that is going to stop the blower from working is, the blower motor itself, the safety thermostat (which will kill all functions of the dryer) and the inverter board. Im sorry if I confused you with thermistors and things. I went from blower motor problem to heating problems..of which, I don't know why. Catriver.



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