Question about Bosch Nexxt WTMC 3300 Electric Dryer

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Dryer will not turn on

Power is getting to dryer, This is indicated by the inside light illumating when switched on and the door is opened. But, no other indication of life. The digital display nor any of the controls work. Any suggestions.

I have a Bosch NEXXT 500 series electirc dryer.

Thanks ahart5179@msn.com

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  • mdbeck Apr 07, 2008

    My dryer will not turn on even though the light inside the drum comes on when you open the door, I dryed 4 loads that same day, but when I tryed to dry the 5th nothing happened. After letting the dryer cool down overnight, it still does not work.

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If some parts of the dryer works and others don't, then a connection wire is either loose or damaged. You can look up the model of your dryer online and find a wiring guide. Then open up the dryer by taking the front (depending on model) and look for a loose wire or any damage. If the dryer has never worked before, then you may need to rewire the plug, for example, in some older houses the wiring is not grounded and the ground wire needs to be connected with the neutral in order to complete the circuit.

Posted on Apr 20, 2008

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3 Answers

THE LIGHT WILL NOT COME ON WHEN THE DOOR IS OPENED AND THE DRYER WILL NOT STOP WITH THE DOOR OPEN


The dryer has a switch in the door that is activated when the door is opened/closed, replace this switch or check the connector to it or the wiring.

Oct 25, 2016 | Kenmore Dryers

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.

on Apr 11, 2009 | Whirlpool LER4634J Electric Dryer

1 Answer

When I open the dryer door the dryer keeps spinning. Which part do I need to buy to make it stop when I open the door.


This is a simple problem to repair.
With the door open you will observe a tab that the door contacts when it closes.

If this tab has become bent or its movement restricted it will not allow the switch mounted on the inside of the dryer to open the circuit when the door opens.

First check that the switch is clicking by depressing the tab. You should hear a click like the sound of your computers mouse each time you depress the tab. No noise would be an indicator that the switch behind the tab has failed or the assembly that holds the switch has failed. If the dryer has a light the light will go on and off as you depress the light. If the light does not come on it is an indicator that the switch or the tab assembly has failed.

The switch and the assembly will likely have to be replaced. Inexpensive kits are available on the e-net that are unique to your model. Replacement requires intermediate skill taking a lot of caution do to the electrical hazard.

"UNPLUG DRYER BEFORE STARTING REPAIR"
The following is a link to replace the switch
https://www.youtube.com/watch?v=ZGE0erKTuqM

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1 Answer

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You need a new door switch, if the switch isn't working the dryer will not start.

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InMrFixIt.

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