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change the cycling thermostat and when was the last time you cleaned out the dryer and vent line?if it's gas it should be done at least once a year electric every 16 to 20 months because you don't have an open flame in there like a gas dryer but you either have bad air movement or the cycling t-stat is bad and if you had to change out the thermal fuse is a definite sign of this,if your clothes have been taking longer to dry you have a block somewhere,you can try removing the vent line from the back of dryer and run it to see if it helps and check the duct that the lint filter slides down into for lint buildup,all a dryer does is spin,heat and move air if it's blocked it will pop the thermal fuse.
If heater is heating and not drying clothes, you have a blockage in ventilation system somewhere either internally in dryer or going out from dryer to outside. Take vent off back of dryer and turn on. Is air flow strong and hot?
If your thermal fuse keeps popping, you may want to ensure you have the vent cleaned out, you may have some sort of restriction somewhere in either the duct,
or the machine. As you know the thermal fuse, protects the machine from over heating.
Check that you have the proper voltage to the machine,
Ohm out the heating element to ensure you have voltage right there, then ohm out your Cycle t-stat, it may not be working right either.
If you are having problems with your gas dryer not heatingthe most common problem is that the ignitor goes bad. Even though it glowssometimes it is still not working properly.
if you dryer is gas check out this gas no heat tip....
If you have an electric dryer, you can have many differentthings that can go wrong causing the dryer not to heat.
check out this electric no heat tip...
your cycling thermostat needs changed too. the thermal fuse is your last safety measure that goes, which means your cycling thermostat is not shutting down the heat element once it detects the right temp hot air in the blower housing so it let the heat element glow until either the high-limit sensor shuts the heat down or the thermal fuse blows. Change the cycling thermostat and good luck
Your exhaust vent is blocked.
Timed dry is High heat.
Permanent press is a medium heat and intermittent.
The dryer does not get as hot as often in Permanent press mode. Therefore the fuse does not reach critacal and blow.
Remove the vent at the rear of the dryer and run a timed load.
If it dries correctly, repair your vent blockage.
If not, repost and I will lead you to the next step.
Change your cycling thermostat. When your cycling thermostat fails, then the reponsibility of your heating element to shut down goes to the high-limit thermal shut off (closest to heat element) and the thermal fuse. Your cycling thermostat should shut down heat element when it detects about 140* air in the blower housing. Yours can't detect that anymore so it lets your dryer heat up and up till you blow the thermal. new cycling thermostat and thermal
There is a fuse in the dryer for the heat. Before tearing into the dryer, make sure the power getting to the dryer is absolutely correct. (check power with the dryer running) Even with incorrect power to the dryer. the drum will still turn but there will be no heat. Many a person has paid for expensive service calls for the problem you are having only to discover by the servicer that there was nothing wrong with the dryer but had bad power to the dryer......