Question about Maytag Neptune MDE7500AY Electric Dryer

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8.8: Electrical control fault. During the move the machine may have received a jolt. You will need to check all wiring connections ate the machine control and the motor control panels as well as the motor.

Posted on Jan 18, 2008

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What does f01 error signal on dryer mean?

Older dryers used a bi-metal klixon mounted on the blower housing to judge the temp and turn the heating element on. Newer ones like your have electronic mess to control the clothes. Instead of a klixon they use a thermistor. The thermistor mounts in the same hole on the blower housing and as air moves across it the resistance is monitored by the electronic control. If the control no longer senses any resistance from the thermistor then it won't know how hot the internal temp of the drum is. So it trys 3 times and then declares an error: F-1. Thermistor replacement is easy enough. Repair clinic offers a video:

Mar 27, 2013 | Whirlpool Dryers


Whirlpool Dryer Various Test Procedures - Part 3

TEST #5 Moisture Sensor
NOTE: This test is started with the machine completely assembled.This test is performed when an automatic cycle
stops too soon, or runs much longer than expected. NOTE: Dryer will shut down automatically after 2-1/2 hours.
The following items are part of this system: Harness/connection, Metal sensor strips, Machine control electronics
1. Activate the diagnostic test mode and advance past saved fault codes.
2. Open the dryer door. If a continuous beep tone is heard and an alphanumeric number is displayed on the console as soon as the door is opened, a short circuit exists in the moisture sensor system. If this doesn’t happen, go to step 3. Otherwise, go to step 4. NOTE: Over drying may be caused by a short circuit in the sensor system.
3. Locate the two metal sensor strips on the inside of the dryer. Bridge these strips with a wet cloth or finger.
If a continuous beep tone is heard and a software revision number is displayed on the console, the sensor passes the test. Go to step 8. If not, continue with step 4.
4. Access the moisture sensor wires: Remove the lint screen. Remove the two wires holding the lint screen to the top. Remove the four screws from bottom of the duct in rear. Remove the duct from the dryer to access
the moisture sensor.Disconnect the sensor connector.
5. Access the machine control electronics. Remove the connector P13 from the circuit board. Check the main
harness connections between the sensor connector and machine control for a short or open circuit. Replace the main harness if necessary. If the harness is okay, continue with step 6.
6. Measure the resistance across the outermost contacts of the sensor connector that includes the two MOVs. Sensor Harness with MOVs (Metal Oxide Varistors) Sensor Connector Sensor Blower Housing Disconnect sensor connector. If a small resistance is measured, check for debris across moisture strips inside of the drum; clean if debris is present. If debris is not present, replace sensor harness with MOVs. Otherwise go to step 7.
7. Measure the resistance across each of the outermost contacts and the center terminal (ground connection).
If a resistance less than infinity is measured, replace the sensor harness with MOVs.
8. If moisture sensor diagnostic test passes, check the thermistor: Perform TEST #4a. If the problem persists after replacing the moisture sensor, harness with MOVs and thermistor, replace the machine control electronics.

TEST #6 Buttons and Indicators
This test is performed when any of the following situations occurs during the Console Buttons and Indicators Diagnostic Test:
None of the indicators light up No beep sound is heard
Some buttons do not light indicators None of the indicators light up:

1. See Diagnostic Guide/Before Servicing.
2. Perform TEST #1 to verify supply connections.
3. Perform TEST #2.
4. Visually check that the P5 connector is inserted all the way into the machine control electronics.
5. Visually check the user interface assembly connections.
6. If both visual checks pass, replace the user interface assembly.
7. Plug in dryer or reconnect power.
8. Perform the Console Buttons and Indicators Diagnostic test to verify repair.
9. If indicators still do not light, the machine control electronics has failed: Unplug dryer or disconnect power.
Replace the machine control electronics. Plug in dryer or reconnect power. Perform the Console Buttons and Indicators Diagnostic test to verify repair.
No beep sound is heard:
1. Visually check that the P5 connector is inserted all the way into the machine control electronics. If visual check passes, replace the user interface assembly.
2. Plug in dryer or reconnect power.
3. Perform the Console Buttons and Indicators Diagnostic test to verify repair.
4. If replacing the user interface assembly failed: Unplug dryer or disconnect power. Replace the machine control electronics. Plug in dryer or reconnect power. Perform the Console Buttons and Indicators Diagnostic test to verify repair.
Some buttons do not light indicators:
1. Visually check the user interface assembly connections. If visual check passes, replace the user interface assembly.
2. Plug in dryer or reconnect power.
3. Perform the Console Buttons and Indicators Diagnostics test to verify repair.

TEST #7 Door Switch
Activate the diagnostic test mode and perform the Door Switch Diagnostic test.
Functionality is verified with a beep each time the door is closed and opened, and a number and letter appears in the display (i.e., 0E, 09). If any of the above conditions are not met: Unplug dryer or disconnect power.
Check that the wires between the door switch and machine control electronics are connected. If the connections are OK, replace the door switch assembly and retest. If the door switch assembly has been replaced and dryer still does not start, replace the machine control electronics.

on Apr 11, 2009 | Whirlpool LER4634J Electric Dryer

1 Answer

My check filter light is on, the buzzer wont work but it is still drying


The electronic display on an LG dryer includes a "Check Filter" warning light. The light is primarily for convenience and does not indicate a major malfunction.

You may have a clogged vent line which will cause the check filter light to go on sometimes. If the air is not getting out the vent and is blocked the sensor thinks the filter is clogged. And you will not get heat either. Check that the flexible vent line behind the dryer is not kinked or crushed. A simple way to check if the vent line leading out from the dryer to the outside of the house is clogged is to remove the vent line from the rear of the dryer. If the dryer gets hot when the vent line is removed, then the clog is between there and the outside vent door. sometimes the little door outside the house gets stuck closed due to lint build up. Or anything can be in the vent going into wall too.

Please get back to us if you have further query or else please accept the solution.

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Sep 02, 2011 | LG DLE2516 Electric Dryer

1 Answer

When i pulled out the lint trap it was overloaded too and half of it got sucked back down (dryer was still going). it hasn't come back out and everything seems to be working fine. i want to know...

Hi cutieheads...

Yes the lint that you lost could cause major problems later.
It may have gotten stuck on the blower wheel, in the air duct of the dryer, or maybe in the flexible duct that carries the vented air to the outside of your house.
Either way it could cause problems with overheating, blowing out thermal fuses from overheating, or clothes not drying properly and possibly fire.
I recommend that you remove the back of your dryer and locate the blower wheel and duct work, open it up and clean any lint that is there, and then also clean your flexible pipe that ducts the heated air to the outside of your house.
You must remove the lint that can cause a blockage and maybe a fire later as more lint builds up and less air moves thru the vent hose.
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Jul 28, 2011 | Roper REX4634KQ Electric Dryer

2 Answers

Not enough heat

You may need to adjust the air flow on your dryer vent.
When an LG dryer is functioning normally---the time required to dry laundry is determined by the *Sensor* located on the drum side of the lint filter housing and by the main control board.
When laundry is near dry--any Time Remaining on the control panel that is *not* needed will be eliminated---except for the last 6 minutes.
The final 6 minutes of any LG automatic cycle is for cooling down the laundry before the dryer ends the cycle.
If a dryer *counts down* to the last 6 minutes but the laundry is still not dry--the computer will allow the dryer to run until the laundry has dried or defaults (not drying within the additional time allowed).
Dryer vents that are longer than 8 feet with more than (2) 90 degree turns--can affect drying performance.
Setting the DRY LEVEL selector to *Very Dry* will solve most dryability issues. In homes with abnormally long vents--even the longer run time in the *Very Dry* setting is usually not sufficient to dry laundry loads.
Reducing the length of the vent or starting a second cycle becomes necessary to fully dry the clothing.
If a second cycle was started---only the amount of time that is needed to dry laundry will be used before dropping to 6 minutes and then the cycle will end with dry laundry.

LG gas dryers are more sensitive to venting length and air flow resistance. The gas burner can cause a rapid increase in temperature compared to an electric burner.
Rapid temperature rise in a gas dryer leads to premature burner shutdown (longer time required to dry laundry).
The gradual temperature increase of an electric element is more "forgiving" in homes where the dryer venting is less than ideal.

The dryer has an auto dry feature which never fully dries the clothes so we wind up manually setting the dry time to an hour
LG gas dryers are VERY temperamental in long vent set-ups. If fabric softener sheets are used in the dryer--clean the two stainless steel strips of metal on the lint filter housing with a SCOTCHBRITE PAD--scrub back & forth several times to remove the waxy residue from the fabric softener sheets. Most,if not all manufacturers do *not* recommend using sheets in dryers that have a moisture sensor (electrodes).
However--using a SCOTCHBRITE pad keeps the wax off those sensors which can be seen if looking *into* the dryer drum and at the lint filter housing.
If only *liquid* fabric softener is used in the washer--clean the dryer sensors once a month. Liquid softener also contains wax which can slowly accumulate on the dryer sensors from the laundry washed in the washer.



May 11, 2010 | LG DLG5988 Stainless Steel Gas Dryer

1 Answer

Dryer not getting as warm as it used to. We recently moved into a new home and this problem has started since we moved. Kenmore EcoCare dryer is about 8 years old.

check to see if the dryer vent is clear (the pipe that runs to the outside of the house). this vent might be ristricting the air flow more than the one at the place you moved from

Mar 10, 2010 | Dryers

1 Answer

My Simpson Sirocco 3500 clothes dryer emits burning smell!

1)check for something stuck between drum and dryer housing 2)check for stuck vent flapper at exhaust opening outside 3) check dryer lint screen

Nov 05, 2009 | Dryers

2 Answers

Dryer does not put out any heat

Electric or Gas?

If electric, the element is gone or a fuse blew or the airflow thru the dryer is restricted or a sensor is bad and 'lying' to the CPU. Check the filter, check the hoses for lint, check the outside vent flap to be sure it isn't stuck (possibly painted) closed. The air has to BLOW a certain CFM or neither ELEC or GAS type will turn on.

If Gas, the pilot isn't lit or the electronic ignition isn't firing or the gas supply valve is bad/stuck or the thermocouple that tells the CPU that the 'heat is on is 'lying' or the sensor that tells the CPU the Air movement is OK' is bad.

My dryer wouldnt heat because a thermocouple in the exhaust pipe was lying - stuck ON and telling the dryer it was already hot enough. ;-)

If you do the troubleshooting, do NOT forget to unplug first!

Mar 26, 2009 | Dryers

1 Answer

Top of Dryer getting scalding hot

hi there try drying a load without your house ducting.if its restricted at all this cause the heat to not leave the dryer a designed by manufacture and their for get hotter.can be other things but thats most should have good air flow leaving dryer when vent off.but because fine at house just moved from i think new house is the problem.God bless ,tom

Jan 05, 2009 | Dryers

1 Answer

We moved in to a new house in Nov. 07 Have a Bosch 500 series dryer (new) The dryer stops after a few minuets and a signal sounds, error shows on display, and states clean filter. The filter is not...

If the dryer worked fine at the old house, I would suspect a wiring or grounding issue could be causing your symptoms.
Electronic controls often exhibit erratic behavior when not grounded properly.

Tip: To save you money, whenever an appliance is moved from 1 location to another, and an issue like this arises, do a thourough electrical and vent investigation before contacting a service provider.
A new dryer will sense a venting inadequacy and give an error code. Investigate your venting system thoroughly. Below are some helpful tips on investigating a vent inadequacy. Always consult your user’s manual before contacting a service provider.

Below are some tips that will aid you in investigating your vent issue.
  1. Do not rely on visual evidence; clean the vent from one end to the other. If possible, remove the entire vent tube and take outside to run water through it. Brushes of different lengths are available from parts suppliers if you cannot remove your venting.
  2. Do not rely on apparent airflow velocities. All dryers use different airflow velocities and minor obstructions are not readily observed optimally without utilizing an anemometer, (air pressure/speed gauge).
  3. Disconnect the dryer from the vent and run a load to eliminate, or suspect, the vent as the cause. If the dryer performs normally then the vent is the cause.
  4. Water can condense in a flexible vent tube and cause sagging. This needs to be eliminated by replacing the vent with rigid ducting if possible, or by bracing the tube. There are numerous venting accessories and options available to optimize the venting of a dryer.
  5. Dryer manufacturers use varying combinations of blower speeds, tumble revolutions, heat temperatures, and sensors to achieve a favorable result.
  6. Always remember that the shortest and straightest vent is the best vent.
  7. The lint filter could be coated with an invisible coating from using fabric sheets in the dryer. Hold the filter horizontally under running water and if the water beads up and does not filter through, replace the filter, and stop using fabric sheets. This same invisible film can also build up on sensor bars and cause drying issues.
  8. Animals, snow, shrubs, etc. have been noted to occasionally restrict the air from exhausting to the outside, by blocking the exterior vent cap. Be sure and check this frequently, especially on cold days, as animals love to be near a heat source.
If my assistance helped resolve this issue, please show your appreciation by rating how effective my advice was in resolving this issue.
Thank you,
Dave E. (Illeagle)

"Your satisfaction is my personal reward"

Jul 04, 2008 | Dryers

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