I have a peculiar problem with my Frigidaire dryer that I have not encountered before. When I try to start the dryer with heat selected (any of the settings from High to Low), the dryer starts but then immediately stops. However, if I select air dry (i.e. no heat), the dryer runs fine (but of course doesn't heat). I've had coils go out on me in other dryers before, but in those cases the dryers still ran even when heat was selected, so I suspect it is not the coils but a problem with a limit switch or thermostat, but am not really sure. Any thoughts as to the most likely culprit?

I did notice right before this happened that the dryer seemed hotter than usual. There aren't any obstructions in the exhaust that I can find.

Thanks!

Thanks for the reply, denman.

I will check the diagonstics, but unfortunately, the dryer is at our 2nd home and I won't go there for another 2-3 weeks, so I can't check it until then. We did have the control board replaced on the unit last summer, but it's been run many times since then without incident.

What are the chances that it might be the thermal limiter? I may go ahead and order that part and replace it to see if that fixes it (it's not too expensive). I will also check the coils to make sure they are not grounded.

I have the same dryer and it has the exact same problem. the error code reads PF. I have pulled the dryer apart and checked the heating element, the high limit thermostat, the thermal limiter all of which check Ok. I have also tried to check the control thermistor which i can not get any continuity. I have set it in cold water and hot water. I could never get any continuity. Is there any other way to check the thermistor or does this mean this could be our problem?

thanks for all the information. I have found the problem. Its the main power supply on the back of the circuit board. I'm going to check on just replacing the power supply first its only $2.60. e bay has whole board from $120 to $150.