My Ducane AC unit has stopped working. The thermostat seems to be OK. The unit recognizes when the temperature is set and when it should go on. The problem is that the fan on the unit outside does not turn on. Before I make a service call, I would like to make sure the unit just does not need to be reset. And yes, I did make sure no circuit breakers were tripped and that the power line was in good condition.

If the compressor works in the unit outside and the fan does not then I would check the fan capacitor first then check the motor itself. It is possible one or both are defective. As far as a reset is concerned you will have to check in the unit itself and along the copper lines in the unit for a resetable pressure switch if one is installed.