Bosch Dryers - Recent Questions, Troubleshooting & Support


As a matter of fact I have solved the problem. The dryer is now fully functioning again. :-)
I'll try to explain how to fix the problem:
The water that condenses in the condensor (doh!) drips down into a container situated below the condensor. The moist air that passes through the condensor is the same air that circulates via the clothes, thus it also contains some lint that the filter doesn't catch. Over time there will be some build-up of lint and mucus (?), clogging the tank AND a sensor that sends a signal to the electronics to start the pump that evacuates the condensed water to the removable tank in the upper part of the machine. This messes up the function of the water evacuation system.
Alright, pull out the condensor and find a hatch in the 'floor' in the farther part of the compartment. Below the hatch you'll find the container that collects the condensed water. Start by cleaning it as thoroughly as you can. There are a few 'nooks and crannies', take your time, also flush with some fresh water and maybe some gentle cleanser to get rid of the mucus. The pump and the sensor for the pump are located in the left part (viewing from front of the machine) of the container. Try to flush there as well.

If this procedure doesn't solve the problem you'll have to disassemble the machine to also be able to remove the pump and sensor housing. I had to do this on mine. Quite a few screws to remove and keep track of, but pretty straight forward if aren't too uncomfortable with 'fixing things'.

I have some pictures of the 'project' somewhere, let me know if you would like to see them or if I may help you some other way.

BR /Hans

Bosch Dryers • Answered Yesterday


This is happening me too. Have you had any suggestions how to solve this problem???

Bosch Dryers • Answered on May 27, 2021


check for clogging or clogged vent

Bosch Dryers • Answered on Nov 23, 2020


I know this is an old question, but I was having the same problem recently and finally figured it out the issue. Posting this in case anyone else has this issue in the future! I searched the web high and low, watched videos, read chats and forums. I even read the machine's manual, cover to cover. I tried everything. I cleaned the lint basket, the heat exchanger, and the moisture sensors. Etc. etc. The solution I discovered is so simple... but it works for me. I discovered that, in my case, the issue is how long I hold my finger on the start button. If you tap it quickly, nothing happens at all. If you hold your finger on the button for too long, it beeps twice and the machine won't start. You have to press the button for just the right amount of time (about 1 second), and then it will start. So frustrating! Hope this is info is helpful for someone.

Bosch Dryers • Answered on Oct 07, 2020


Presumably an induction motor rather than a series wound brush type motor? A single phase induction motor needs help to get started - without help it will just buzz, though it can be started in either direction by manually giving the shaft a vigorous twist... The starting help is provided by an extra winding (start winding) that provides a phase shift to give the rotor a "kick" in the right direction and then is taken out of circuit. In the early days this was accomplished manually by a switch but later motors incorporated a centrifugal switch on the rotor shaft usually in series with a capacitor. Lots of modern motors just have the capacitor in series with the start winding resulting in a lighter, cheaper and more compact unit though the capacitor is more highly stressed and fails much more often.

Bosch Dryers • Answered on Sep 26, 2020


https://www.bosch-home.com/ne/products/washers-dryers

Bosch Dryers • Answered on May 14, 2020


First of all the item I referred to in my question is actually a heat exchanger located below the dryer drum.
The maintenance man in the condo said remove it and clean it with soap and water. I did have a garden hose with a sprayer so I used the bath tube to give it a good cleaning.
It now looks clean and I cleaned the housing where this part is located with vaccuum and wet cleaning.
jtoolan 6-12-09 7:45 AM

Bosch Axxis... • Answered on Apr 07, 2020


Electric dryer no start does nothing Check dryer Terminal block prongs both outside prongs should give combined 220, and 110 each if u check 1 outside & 1 center (ground) prong. Also check house electrical outlet for full voltage. CHECK THERMAL SHUT OFF THERMOSTAT USUALLY LOCATED ON THE BLOWER. for OHMS or resistance with a meter. Should show a closed circuit. Ohms WHEN THIS FUSE BLOWS IT WILL SHUT DOWN EVERYTHING. NEXT Test the PUSH start switch with meter for OHMS. Should show OHMS when pushed in or on start, and no ohms or infinity when in off position. If you hear a humming/clicking sound from motor area you more than likely have a bad motor. Try this test out to see if u have weak windings or relay/capacitor on motor. Open the dryer door and turn by hand the drum while machine is on ON position. And you or someone else presses the door engagement switch in. If it starts up then u have bad windings Another thing to checkis the belt safety switch. With a multi meter. Especially if u just replaced the belt. The belt safety switch is attached to the Tensioner and motor. IT LOOKS LIKE A DOOR SWITCH SOMEWHAT a little black pc of plastic with 2 prongs going into it. Sits at bottom of motor. Under the Tensioner. Attach meter clips to the 2 prongs on switch, Then when the little white push button is pressed in it should show continuity and none when released. Lastly check ur DOOR SWITCH for continuity with a meter when the button is pushed in the (on/Door closed position,) it may have gone bad. https://www.youtube.com/watch?v=MhVUEhngZMg https://www.youtube.com/watch?v=9xD7lCXJ0ZM https://www.youtube.com/watch?v=sTRP6kHqAFs Hey GOD IS GOOD !!!! WHICH IS WHY MY ADVICE IS FREE testdryerdoorswitch-undefined-undefined-0_0.jpg beltswitcht 5-undefined-undefined-2_0.jpg cord dryer_terminal_block-undefined-undefined-5.jpg how2test terminal wires-undefined-undefined-9_1.png

Bosch Nexxt WTMC... • Answered on Apr 04, 2020


Had the same problem. I clean it the way you mention with the addtion of blowing compressed air through the vent pipe and it still failed to work. I unplugged the power for a couple of mintues, still did not work. I rotated the dial and pressed start at each position. In the "SHORT" position, it worked and subsequently worked in all positions there after.

Bosch Nexxt WTMC... • Answered on Mar 30, 2020


Try cleaning out the compartment below the lint filter. There's a sensor in there that is probably buried in lint.

Bosch Nexxt WTMC... • Answered on Mar 30, 2020


Electric dryer no start does nothing Check dryer Terminal block prongs both outside prongs should give combined 220, and 110 each if u check 1 outside & 1 center (ground) prong. Also check house electrical outlet for full voltage. CHECK THERMAL SHUT OFF THERMOSTAT USUALLY LOCATED ON THE BLOWER. for OHMS or resistance with a meter. Should show a closed circuit. Ohms WHEN THIS FUSE BLOWS IT WILL SHUT DOWN EVERYTHING. NEXT Test the PUSH start switch with meter for OHMS. Should show OHMS when pushed in or on start, and no ohms or infinity when in off position. If you hear a humming/clicking sound from motor area you more than likely have a bad motor. Try this test out to see if u have weak windings or relay/capacitor on motor. Open the dryer door and turn by hand the drum while machine is onONposition. And you or someone else presses the door engagement switch in. If it starts up then u have bad windings Another thing to check is the belt safety switch. With a multi meter. Especially if u just replaced the belt.The belt safety switch is attached to theTensionerand motor. IT LOOKS LIKE A DOOR SWITCH SOMEWHAT a little black pc of plastic with 2 prongs going into it. Sits at bottom of motor. Under theTensioner. Attach meter clips to the 2 prongs on switch, Then when the little white push button is pressed in it should show continuity and none when released. Lastly checkurDOOR SWITCH ?for continuity with a meter when the button is pushed in the (on/Door closed position,) it may have gone bad. https://www.youtube.com/watch?v=MhVUEhngZMg https://www.youtube.com/watch?v=9xD7lCXJ0ZM https://www.youtube.com/watch?v=sTRP6kHqAFs Hey GOD IS GOOD !!!! WHICH IS WHY MY ADVICE IS FREE cord dryer_terminal_block-undefined-undefined-0.jpg bypass-lid-switch-unplug - 5-undefined-undefined-2.jpg fuses dryercyclingfuse-undefined-undefined-5_0.jpg

Bosch Dryers • Answered on Mar 28, 2020


The Bosch Dryer has a temperature probe in the heater exit and in the exhaust area visible when you open the door. If the temperature difference between the two gets to high, the lint filter is assumed to be plugged and the alarm goes off. It seems that the temperature probe at the heater, can end up with a faulty connection to the control panel over time due to corroded contacts or lint build up. When this happens the control panel thinks the filter is clogged and it may also not turn on the heating elements properly. Remove the back cover over the heating element (12 screws) and then remove the one screw holding the red wiring connection to the dryer body. You can then wiggle out the wiring connection and clean / unplug and replug in the connector for the sensor. (plug with two small wires only). A little hard feeding the connector back through the hole so take your time and don't damage the wires). Should all work again. May want to inspect inside the heater at same time and make sure the overheating switch is not tripped. ( press in the red button).

Bosch WTMC3510UC... • Answered on Mar 27, 2020


I just had the same problem, motor runs but no heat. I had a fun time figuring out how take the front panel off, hint the rubber seal comes off easily. It looks like mine tripped the resettable over heat sensor. So far so good.

Bosch Nexxt WTMC... • Answered on Dec 27, 2019


Well I would recheck the water reservoir is fully inserted ....the door has no debris inside the lock....the bottom filter is cleaned not just the door filter.if this still not fixes then try a reset by switching off at socket then whilst holding start button without releasing for at least five seconds turn on power and listen for a click.sometimes a sensor is stuck and not relaying proper status.

Bosch Dryers • Answered on Jul 24, 2019


you can take it all apart and clean it by hand, or take the cap off the outside and use a leaf blower to push out all the build up

Bosch Axxis WTA... • Answered on Jul 09, 2019


Consult owners manual for how to deactivate lock.

Bosch Dryers • Answered on Jul 08, 2019

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