Kenmore Electric Dryer broken AGAIN!

Arg! Our Kenmore Dryer has stopped heating again because the high-temp cutoff switch opened. On 11/02 we had the same problem (I've included my FIXED post below).
Any ideas as to what could cause the high-temp cutoff to repeatedly blow? Not enough venting? Why isn't the low-temp switch preventing the blow out?
Thanks, Mike
======================================================================From 11/02/2005: I appreciate the posts and suggestions. After reading some of the online repair websites, I checked the thermostats on the heating element can. The high temp cut off was an open circuit (#3977394). I bought a replacement kit at Fox Appliance in Doraville, GA for $25 and installed it yesterday. Dryer appears to be working again.
The guy at Fox said to replace both the open-circuited part and the lower-temp thermostat (both pieces were in the $25 kit). He said that the low-temp part should have cut in before the high-temp part. I assume that one of two things happened:
1) The low-temp part was defective and the dryer overheated until it triggered the high-temp cut off thermostat.
2) The high-temp cut off thermostat was defective and triggered at a much lower temperature than it should have.
Anyone have any thoughts on this? #1 concerns me as it would mean that a true overheat occured and I need to know why. #2 is a simple manufacturing defect.
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Usually this is caused by lint build up in the drier just beyond the filter and before the vent opening. It can also be caused by kinking of the vent hose, lint build up in the hose or wall vent opening or any other obstruction to air flow into or out of the dryer.
Get a flat brush and clean out the area where the lint filter goes or disassemble the front of the dryer and clean out by hand. This is one of the most underrated preventative maintenence tasks I can think of. It's easy to do but few people are even aware that the dryer needs to be inspected regularly for lint build up. Manuals barely mention it but if ignored inevitably results in a non functioning dryer and a $25 DIY fix or a +$100 service call.
The hi temp cutoff is actually a non resettable thermal fuse. The replacement kit often contains additional parts for gas and electric so you end up paying for more than you need.
Whan I selected my dryer, the configuration of the lint filter (and how easy it would be to clean) turned out to be the most important factor to me.

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Hi,

Grounded heating element, poor air flow ( venting, vent hood, dryer ducts ) bad operating thermostat could cause the heating element area to overheat and trip the high temp cutoff.
jeff. Appliance Repair Aid http://www.applianceaid.com /
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Try drying the clothes with the duct disconnected from the back of the dryer. A pair of pantyhose will temporarily contain the lint. If the dryer works well, then it is your dryer vent that is clogged or damaged. This can cause the thermostats to fail or heating elements to burn out. Call a Certified Dryer Exhaust Technician or DIY. Alisa Certified Dryer Exhaust Technician http://www.CleanYourOwnDryerVent.com /
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Three things can cause this. Your vent is restricted, your operating thermostat is shorted, you have lint build up in the fan housing.

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