Initially I had an Error 64 (heater) error. I purchased a cheap non-OEM heater and installed it. Within a day the dryer was flashing CE error (clear exhaust). I had already cleaned the inside of the machine after replacing the heater so I replaced the vent hose which is only about five feet long. The CE error persisted so I ordered and replaced the thermistors (front and rear). The problem continued for a week until the dryer displayed an E63 error (heater grounded). I removed the old heater and found the inside plate was warped. In addition, the screw that holds the heater in the back was way too long and touching the coils. I ordered an OEM heater, installed it, and the dryer has been working perfectly with no CE error. The moral of the story is: don’t waste your time and money on a non-OEM heater. I had this machine apart several times with a lot of wasted time because of a bad part. Note: I used the diagnostic mode on the dryer and ran through every test multiple times, watching for thermistor values to change and heat to increase and decrease. I also tested the thermostat and thermal fuses for continuity and the thermistor Ohm values.