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The dryer does not pass 6 min mark and does not shut off. How would I test a humidity sensor? Thank you for help.

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A dryer moisture sensor can stop working without notice, until you notice your clothes being over dried or still wet at the end of the cycle. It is a good practice to test the dryer moisture sensor periodically. There are two types of moisture-detecting sensors for dryers. Once you understand how they work you will see how to test each one.
1. Sensor BarThese sensors contain digits that protrude outwardly. They work on an electrical current and the moisture from the clothing.
The first step to test is to place completely dry clothes in the dryer and turn on the dryer; it should run for a few moments and then shut down right away.
Secondly, place damp clothes into the dryer, turn on the dryer and watch the timer. As the clothes begin to dry the timer will move and shut off.
2. ThermostatThe timer is regulated by the thermostat. The thermostat rests in a closed position. To test this type of moisture sensor, place damp clothes in the dryer. Watch the timer; as the clothes begin to dry, the thermostat should open and the timer will move forward ,eventually shutting off.



Posted on Sep 08, 2013

Testimonial: "That did not help. I shut off the power to the unit for 5 min. and that did the trick. Does it mean there is bad PCB inside?"

  • liontass Sep 08, 2013

    A dryer moisture sensor can stop working without notice, until you notice your clothes being over dried or still wet at the end of the cycle. It is a good practice to test the dryer moisture sensor periodically. There are two types of moisture-detecting sensors for dryers. Once you understand how they work you will see how to test each one.
    1. Sensor BarThese sensors contain digits that protrude outwardly. They work on an electrical current and the moisture from the clothing.
    The first step to test is to place completely dry clothes in the dryer and turn on the dryer; it should run for a few moments and then shut down right away.
    Secondly, place damp clothes into the dryer, turn on the dryer and watch the timer. As the clothes begin to dry the timer will move and shut off.
    2. ThermostatThe timer is regulated by the thermostat. The thermostat rests in a closed position. To test this type of moisture sensor, place damp clothes in the dryer. Watch the timer; as the clothes begin to dry, the thermostat should open and the timer will move forward ,eventually shutting off.



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MNTECH
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SOURCE: sensor dry timer problem

Clean off the moisture sensor bars. They are the silver curved strips about 4 inches long inside the drum near the lint fitler. If you use fabric softner sheets, a waxy build up will coat the bars. The dyer can no longer sense the damp clothes, so it goes into the cool down and then shuts off. Time dry bypasses the moisture sensor.

Posted on Nov 30, 2008

  • 1 Answer

SOURCE: drying timer on auto dry

I called LG...they said to unplug the dryer for 5 min. to reset the timer ...this solved the problem.
They also said not to use dryer sheets during the sensor dry cycle as the coating on the dryer sheets causes the sensor to malfunction as it can't read the humidity level in the dryer.

Posted on Dec 29, 2008

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Should the fan shut off when the humidity setting has been reached for model Frigidaire CAD504DWL 50-Pint Two Speed?


Thank you for your post, friend!

I see that your question is if the fan should shut off once it has reached the recommended setting. The fan will run even when the compressor cuts off so that air can pass over the sensor coils to check the humidity. This is a normal operation. I hope this is helpful. -Matt

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Tip

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.

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2 Answers

Dryer is set to run 40 mins when it shouts off at 0 on the dryer is has only run 20 mins according to my stove timer


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I have a Fridgidaire Model LEQ144ZES0. Dryer will run for about a minute, shut off, then the display lights on far right Drying,Cool down,Prees Saver, Clean lint filter flsah 6 times and then thr Start...


Good Morning Friend,

I understand that you are having trouble with your Frigidaire dryer, model# LEQ1442ES0, shutting itself off after about a minute. I see that the lights to the far right flash 6 times and then the start and cancel button flash 2 times. This also, only seems to occur when the weather is warm and humid. I suggest putting a dehumidifier near your dryer during the warmer months to see if this helps to draw the humidity away from the dryer. The humidity can cause your appliance to not run as it should. The other suggestion I have, would be to reset your dryer. You will do this by either unplugging it or shutting the power off at your home's circuit breaker for 3-5 minutes. I ask that you please follow up with a comment on the post, at your convenience, to advise if further troubleshooting is needed or if your refrigerator status has changed successfully. Hope this is helpful.

-Best Regards-
WP

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I called LG...they said to unplug the dryer for 5 min. to reset the timer ...this solved the problem.
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Clean off the moisture sensor bars. They are the silver curved strips about 4 inches long inside the drum near the lint fitler. If you use fabric softner sheets, a waxy build up will coat the bars. The dyer can no longer sense the damp clothes, so it goes into the cool down and then shuts off. Time dry bypasses the moisture sensor.

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