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Re: auto dry cycle won't advance
It seems the logical solution to this is that you have a sticking electro-mechanical timer or a faulty control unit if it is electronical
controlled, only solution would be to replace.
Plz rate suggestion.
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A timed drying cycle uses the timer alone to stop the drying cycle. Once it times out like an egg timer a set of contacts open up shutting off the dryer. Or a set of contacts closes to activate a relay which in turn shuts off the power.
Auto dry usually uses a moisture sensor which would do the same thing as the timer. Once it doesnt sense moisture in the load for a predetermined time it in turn triggers a relay which shuts the power off. Some auto dry cycles just use the timer alone and guess-timate the drying time by the selection.
If yours does not use a moisture sensor then most likely it is your timer/cycle switch. There may or may not be a relay involved.
Most dryers have a basic wiring diagram on the inside somewhere on one of the panels which will help.
Since yours is acting up on both cycles Im guessing you have a bad relay or connection to that relay somewhere IF it uses a moisture sensor.
Does the timer advance to the end or does it stop advancing in the middle of the cycle? If the unit does advance to the end on timed but it won't advance on auto, that means your cycling thermostat isn't triggering. First, make sure your vent is cleaned and the best way to do that is just run a cycle without the vent hose connected to the back of the dryer to see if things change. If your dryer still won't dry properly, then the cycling thermostat will need to be replaced because it's not cycling properly.
Try it on the timed cycle. If it doesn't advance, then you have a bad timer and the timer will need to be replaced.
The cycling thermostat is mounted to the front of the blower wheel housing.
See if the timer advances in the timed dry or the auto dry cycles. If the timer advances in timed dry but not in auto dry, then you could have a wire connection failure in the orange wire from the heating element to the timer.
If the timer will not advance in either type of cycle, then I recommend checking the timer part number that you are using.
check the blower wheel, sounds to me like it is loose on the blower motor, common on these dryers. One sure sign would be a warped filter and a rusted top. The blower aint putting out enough and the dryer is over heating .
if you are using the auto dry setting and the dryer is still running after 5 hours you either have a timer issue or a thermostat problem.
The timer is driven by a motor, if the timer motor is bad the timer wont time out.
in the auto dry cycle the thermostat has to cycle off and on which then sends power to the timer again advancing the timer.
set the timer in a timed dry cycle for say ten minutes, if the timer advances and turns off then you know the timer works. if it doesnt advance you have a timer motor issue,
if the problem is the auto cycle, you could replace the thermostat, about $20 american. however a clock timer would be cheaper.
Based on how old is your machine and do you want to stick a timer in it after already paying the service man is up to you.
A basic bath towel load should be dry in about 50 minutes, this varies on how good your seals are and how long a vent you are running, if the dryer vent was plugged you already have shortened the life of your heating element.
It sounds like a timer problem since it happens during timed also. Some dryers don't have an actual moisture sensor for auto dry. They work by knowing that as long as the clothes are wet the temp won't go past a certain point. As the clothes dry it trips a thermostat that lets the timer advance. Until this is fixed DON"T trust the timer to shut off the dryer. Sometimes it won't or could leave the dryer running for hours. This has nothing whatsoever to do with fuses. There are no fuses in a dryer. Just high limit thermostats and other devices that will shut off the heat but usually not the motor.