I have an LG DLE7177rm dryer that doesn't heat. I'm not making this up, but - if I take the drum and belt out and run it by pulling up the pulley on the motor, the heater works. When I put the drum back in, the heater doesn't work. This has happened three times. All of the old components tested out, but I've since replace the pcb board, the heater and the thermistor (even though they all tested out okay - I thought maybe it was an intermittent issue...) So with all of those parts new (and the thermostats are on the new heater, so they're new too) - i without the drum, the heater turns on... I get excited, put the drum in and put it all back together - then the heater doesn't work (on any setting). There are no loose wires and as I said, it's happened three times.