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Miele T355 timer doesn't latch

No matter which cycle the dryer is set on the timer indicator steadily advances through 360 degrees then stops. While it is advancing the drum rotates and the laundry is heated so if I sit by it with a cup of tea or coffee and keep cycling the dryer the laundry eventually gets dry. Any idea as to what might be wrong?

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  • rhughes_phug Jul 21, 2009

    Maybe I need to be more specific. Maybe 1 time out of ten the dryer functions correctly. Roughly half the time, however, no matter which program I select the dial timer advances all the way around (360 degrees) and then stops. The other half of the time the dial timer just keeps advancing through multiple 360 degrees. While the timer dial is advancing the machine tumbles and heats. The only clue I can find in the manual is that, after a power outage that exceeds 10 minutes, the dial will advance rapidly to the end of the program cycles and then stops. This is what the machine does roughly half the time.

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Modern dryers use a step motor on the timer, as opposed to a fixed rate timer seen in older models. The timer advances using one of two different mechanisms, depending on the model. On most, the timer receives a signal from the thermostat that a predetermined temperature has been reached - on others it receives the signal from the moisture sensor (if so equipped).

Posted on Jul 20, 2009

  • dray8165 Jul 21, 2009

    I'm sorry - I guess I needed to follow the thought through. If either the thermostat or moisture sensor is giving bad info to the timer, it will continue to advance despite the clothes not being dry yet. Either of these components can be checked with an ohmmeter or replaced fairly easily and cheaply. If this is not the problem, the next most likely culprit is the timer itself, although usually when the timer is bad it doesn't advance at all.

  • eb_jacob
    eb_jacob Feb 09, 2012

    I have the same problem. Did you manage to solve it...? Can you get speare-parts?

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Does the timer advance to the end or does it stop advancing in the middle of the cycle?
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If your dryer seems to run forever, it could be because of a clogged vent or internal ductwork. Your dryer may have an automatic cycle that turns off the dryer when the clothes are dry. It does this with a special thermostat or moisture-sensing system.

Normally, this is what happens during an automatic cycle:

The thermostat tells the dryer to heat until the interior of the dryer reaches a pre-set temperature--say 135 degrees.

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Your dryer's heating element may be partially burned out. If it is, your dryer still heats, but at such a low temperature that it takes three or four times as long to dry the clothes. If the element is partially burned out, replace the heating element. You can check for an ohm reading but will need to refer to the service manual for proper reading. This sometimes on the tech sheet located somewhere on the dryer. Usually between 9-13 ohms.


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Normally, this is what happens during an automatic cycle:
The thermostat tells the dryer to heat until the interior of the dryer reaches a pre-set temperature--say 135 degrees.
When the dryer reaches the pre-set temperature, the thermostat tells the timer to begin advancing. (If there's a moisture sensor, the timer advances only if the moisture content of the clothing is low enough.)
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