Question about Dryers

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My dryer has a sort circuit somewhere and I need to figure out where. The heater turns on without the switch being hit. It also does not adjust it's heat. In other words it does not change between Low, Medium or High. Instead it stays high.

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  • deyoung5 Apr 25, 2010

    Th problem is I have replaced the heating element. I want to make sure I am headed in the right direction because we have replaced the timer, the high limit thermostat, and we still have the short.

  • deyoung5 Apr 25, 2010

    I meant short circuit

  • deyoung5 Apr 25, 2010

    I removed the wires from each element one wire at a time. I then tested the terminal and tested the body of the dryer. For each element it read Infinity. Not sure where to go from here.

  • deyoung5 Apr 25, 2010

    All of the parts mentioned read infinity to the chasis. Not sure where to go from here.

  • deyoung5 Apr 25, 2010

    What switch?

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4 Answers

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  • Master
  • 949 Answers

If the heater comes on without the dryer running it can be one of two things that have failed.

The most common would be the element itself is shorted to ground. If something gets caught in the element or the element breaks and touches ground it has a path to always be on. In this case you could removed the element and replace it.

The second thing that can cause it would be the centrifugal switch internal to the motor. The heater is not suppose to come on with out the motor running and the centrifugal switch tells the heater the motor is on. This has to be checked with an ohmmeter and we have to have the wiring diagram.

Posted on Apr 25, 2010

  • Philip Apr 25, 2010

    Do you have the wiring diagram to follow? What we are looking for is a set of switch contacts on the motor that are in the heat circuit.

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  • Master
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Replace the switch and your problem should be solved. J.

Posted on Apr 25, 2010

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  • Master
  • 1,218 Answers

Good day,
That event usually occurs when a part of the heating element is touching the canister or some part of the cabinet.
However, if that checks out to be not true then.....
The heating element has 2 terminals. One normally goes right to one side of the 230 volt supply.
The other goes thru a series of controls, including all safety thermostats, control thermostat, heat selector switch and finally the timer itself.
All of the items described above are on and off switches which control the heater as to when and how it should be powered up.

If any one of those items shorted internally to the frame or chassis of the machine it would hold the power to the dryer all the time.

Each one would have to be tested with an ohm meter with it's separate wires removed to see if it is the culprit. The electrical terminals should read infinity to the chassis.

Lastly, a frayed shorted wire can create the same event. It would be a step by step procedure using an ohm meter and visual inspection.

The trouble shooting should be done in the order as described above.

Posted on Apr 25, 2010

  • John Hall Apr 25, 2010

    Good day,

    I would assume that one of the components or the wiring harness would be at fault. In fact it must be one of them.

    What is the history of this event. In other words what was happening to the machine to cause you to start this trouble shooting event ??

    What make, model and style of machine are we working on here, and as well, have you seen it working properly in the past ???

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  • Dryers Master
  • 8,220 Answers

Your heater element is broken and welded to ground. To repair it you will need to know how to access the innards. More Here

Posted on Apr 25, 2010

  • 1 more comment 
  • Dan Webster
    Dan Webster Apr 25, 2010

    Thanks

  • Dan Webster
    Dan Webster Apr 25, 2010

    Disconnect each component till the short goes away. It is as simple as that.

  • Dan Webster
    Dan Webster Apr 25, 2010

    Post your model number. That way I can consult the schematic. By knowing what brand you have and the model number I can do some research for you. You question is very generic in nature.

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