This could be the effect of a number of problems. Here's a list of things to check and details on how to do it.
- Fuse could be bad -- Check the fuse for a break inside. If it's bad, replace it with an identical fuse.
Temperature switch could be bad -- Use VOM to check the switch. Set VOM
to RX1, remove leads and touch the probes to the switch's terminals.
The reading should be zero or infinity. Turn the switch, and the
reading should change from zero to infinity or infinity to zero. If
not, the switch is bad.
- Thermostat could be bad -- Set
the VOM to RX1, take a lead off one of the two outside terminals and
press the probes to the two outside terminals. There should be a
reading of zero. If not, it's bad.
- Heating coils may be
bad -- Set the VOM to RX1 and remove the leads from the coil. Press the
probes to the terminals. If the reading is zero, the coil is bad.
Timer could be bad -- Disconnect the leads from the motor. Set the VOM
to RX100. Clip the probes onto the leads. If the reading is infinity,
the timer motor is bad.