My relatively new (3 years old?) Frigidaire dryer (Model FEO332CES0,
Heavy Duty w/ Moisture Sensor) only heats intermittently. The heater
runs for about 5 minutes then stops heating, although the drum
continues to tumble.

I suspect it's something in the heat sensor or the moisture sensor,
but don't know where to look.

Any ideas?

Thanks,

Ian