I posted the problem a few weeks ago and I was told I might have a
blockage but I do not, I took apart the vent from wall and the entire
exhaust system in the dryer and found nothing. This time the fuse only
lasted 1-2 weeks and in the past it lasted a month or so, would it be
the thermostate or the thermostate heater? I have no clue anymore, can
you help my model number is lea30aw if you need it thanks
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Not enough airflow caused by blockage in the exhaust vent pipe.(most common) Check for strong airflow coming out of the back of machine, then check for good airflow at exterior vent. Clean vent if airflow is restricted.
Refer to part #11 on diagram #4 to see where the thermal fuse is located. The thermal fuse and the high limit thermostat must be replaced. You must find and correct the vent blockage problem or you will blow out the new parts. Check the vent system inside the dryer. Check the connecting vent from the dryer to the wall connection. Check the through the wall connection. Also check the blower wheel attached to the motor. It could be stripped and slipping on the motor shaft.
The most likely cause for this problem is the thermal fuse, or high limit as it is called. They are designed to blow if the temperature gets to a dangerous level. The excessive heat is usually caused by a lack of airflow over the element, the culperate for this is usually excessive lint somewhere in the venting system. It could be the dryer hose, the vent cap, but also could be within the dryer. I've seen it packed in the area just passed the lint filter packed so tight I had to scrape it out with a putty knife and then wash out the rest. This can also be caused by a damaged blower motor wheel (lack of airflow, which will overheat the dryer and blow the high limit) though the blower wheel is usually the least likely problem.
Generally it is a blockage in the venting system or used with lots of cloths and a plugged lint filter that causes the high limit to blow. The high limit fuses aren't expensive. Get the model and serial of your dryer and check the web for high limit/thermal fuse, they cost approximately 12-25 dollars.
A simple continuity test with a test light or multimeter will tell you if it is good or not. (fuse) MAKE SURE IT IS UNPLUGGED if/when you try this. They are located on the back of the unit under the back cover towards the bottom. Most units have 8 or so screws holding the back plate on.
The thermal fuse or high limit thermostat failure generally points to a reduction of air flow due to SOME blockage either inside the dryer or in the vent pipe leading out of the house. If you find either of these parts bad be sure to check the vents after replacing parts to ensure the same parts won't fail again.
It sounds like you have blockage in SOME area of the venting system, either interior to the dryer or in the vent pipe leading out of the house. The thermal fuse is a safety feature to warn of low air flow. Remove vent from wall and run dryer placing hand over end of hose to determine strength of flow difference after attempting to do the same thing at the exhaust outside the house. Good Luck.
check the entire exhaust system for blockages. check all components that make up the entire exhaust system. this includes the vent hose and blower assembly as well. if the exhaust system if free of obstructions, this will confirm a faulty High limit thermostat. replace this failed component asap.
During the exhaust check, make sure when the unit is drying that, it is blowing at a high rate. you should feel a good forceful air flow out the vent. if its weak, you will need to clear the blockage.
My dryer stopped working, using a multimeter I determined that the thermal fuse was open. I unclogged all the ducts then ordered a high limit thermal kit. After changing the fuse, it blew-up on the first cycle. It turns out that even though the high limit checked ok, it was defective. After changing both the fuse and the thermostat(included in the kit $25), the dryer worked correctly.
I had the same thing happen, I replaced the thermal cutoff and made sure no lint build up. It lasted a week then blew again. I then replaced it again and got to thinking why it would blow. I then took apart the exaust inside the dryer running fron the drum to the motor and right before the motor was a build up of lint ane particals that was almost like compressed sawdust which was blocking half of the line. I cleaned this out and it seemed to work much better.