My dryer takes a long time to dry a load of clothes. Lint trap is clean and vent duct is clean as well. Took it all apart to check it. All thermostats check out when checked with a multi- meter. Also checked fan where it connects to blower motor and it is not stripped out. Have 220 running to dryer. Is it possible I have a thermostat not cycling properly? There are two on the exhaust side and 1 on the heating element. Which one do you think it would be? Any help is appreciated. Thanks!!
You can try replacing the cycling thermostat, this part here should be the one
but the main cause of not heating sufficiently is insufficient air flow.
The air inlet into the dryer must be clear, and for the air outlet to the outside must be clear. Also check your blower to make sure it is working correctly. Finally examine your heating element to make sure it is not grounding out somewhere.