My Samsung Dryer (Dv42H5200EF/A3-03) is 8 years old has had problems annually.
Past repair history:
Replaced belt pulley after 2 years with one that had ball bearings
Replaced rollers several times. Mistakenly tried to lubricate with silicon spray and graphite. 2 years ago I replaced rollers with ball bearing rollers that are now working
Replaced thermostat, thermistor, and thermal fuse several times
Replaced heating element several times. Current heating element is fine and not shorted against the housing.
Replaced wiring to heating element
The current state is that the thermal fuse keeps dying which results in no heat and the dryer not functioning
Troubleshooting I have tried
The vents are clear. I have used a cleaner, leaf blower, and vaccum. I use and endoscope to verify the air path and vents are clear.
I test all sensors before installing for continuity and the thermistor for the appropriate resistance (8k-10k) at room temperature.
The felt gasket is fine.
Roller wheels are fine
Belt and motor are fine, blower fan is working and clean
I no longer buy parts from Amazon, I only buy OEM from legitimate dealers as I feel the heating elements and sensors I have had are cheap copies.
The motor runs and turns the drum, there is no lock up or slowing
I run most loads at Extra Low or Low heat, rarely at higher heat.
