Question about Dryers
This is an MDG7500AWW with a sensor cycle tied to a "sensor" comprised of two parallel metal strips in the drying chamber. Clothes right out of the washer only dry for 4 minutes. I don't have a schematic but found a few online and noticed that two blue wires from the control go to each of the metal strips, which is how this was wired. The odd thing is that the other end of each metal strip wasn't connected to ground. I saw on various repair sites that Maytag has a ground wire assembly for the sensor. I wired up my own, tieing the ground to a nonpainted, enamled surface and nothing changed. Using a VOM, I could see some swing of the needle when pressing a wet papertowel across the metal bars but it was very low. The metal strips look pretty clean: no goo or rust. Any ideas on how to get this feature working again?
Have a maytag gas dryer MDG5500AWQ bought new control board, can you tell me where the wires go to plug into the board ?
Posted on Apr 17, 2009
The problem is most likely due to an airflow restriction somewhere. These usually occur in the vent duct that connects the back of the dryer to the outside of the house. These vents should be cleaned at least once every 2-4 years depending on what types of fabrics you usually dry, according to manufacturers. The best test for this is to pull the dryer out, disconnect the vent from the wall and start the dryer. Feel the amount of airflow coming out of the dryer, reconnect the vent and see how much air is coming out of the vent outside. It will be slightly less, but it should be close. If you cannot access the outside hood (on roof, etc.) you can also test this theory by disconnecting the vent from the dryer and try to dry a load in auto dry mode. If the load dries ok, then the problem is definitely in the vent. Any further questions are certainly welcome. Good luck.
Posted on Oct 14, 2007
Well the metal bars dont work quite like you have tested above but i have to say you are on track here. It is correct that the 2 sensor wires are tird directly to the board so remove your gounding of the bars. The control has capacitiors that charge the bars with 24vdc and looks for the bars grounding to the wet clothes. The control board has the chassis ground tied into same connector as the sensor wire. so it doesnt need a ground tied to one of the bars like previous models. Enter service mode by pressing help and back keys for 3 secs Then see if there are any codes stored Then go to system check this is where you can test the sensor circuit you can even start a dry cycle with wet clothes enter service mode go to system check, and see if it says damp dry sensed, normal dry sensed, or short circuit sensed
Posted on Oct 07, 2007
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Posted on Jan 02, 2017
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