Maytag DWU9200AAX

[Tim M]

  .

Cleaned out the ducting, blower, etc.  Even with the duct disconnected the dryer runs cool.  Then I noticed the first time it is used the coils get good and hot 400° plus.  Then they click off and the thing runs cool for quite a long time.

So if I'm testing the thermostats individually, can I use an infrared gun right on the metal adjacent to the thermostats or do I need to test it another way?

[RegUS_PatOff]

check the Vent (disconnected) output temperature ...

(with the Dryer assembled)

Check for good air-flow

With an empty load, Timed Dry, High Heat, the vent temperature should cycle somewhere between 135F and 160F

[Tim M]

Airflow is good. Temperature starts out hot, but the element cycles off, then takes a good long time to get started again.

[RegUS_PatOff]

[user=28611]Tim M[/user] wrote:

...Temperature starts out hot....  then takes a good long time to get started ...

how hot ?

how long ?

If you have a Harbor Freight store near you

click on picture $ 2.99

[Tim M]

Thanks, already got one, from Harbor Freight, like you said as it is 1/4 the price of elsewhere. I'll check it tomorrow. I'm also thinking it may be the old fabric softener left a coating on the lint screen and blocked the airflow. Because I THINK the airflow was good at times but not at others.

I'm back there on Sunday and will check it out.

[Tim M]

Hmmmmm...

Seemed to have fixed itself in my absence. The grandmother had found it worked better on medium than on high. Given that the element was up to around 400° with long breaks. It seemed that the lower safety thermostat on the element must have been tripping at 225° (or more) than needing to cool down a good 80° or more, before the heat could kick on again.

The cycling thermostat was working fine, so it seemed, and the temperature control switch ohmed out fine. So I wonder if there was some problem with the cycling thermostat that was intermittent. It had regular cycles within the cycling thermostat's stated range on this visit.