Our whirpool duet electric dryer is used outdoors. Cold nighttime temperatures have arrived in our area of as low as 5 degrees farenheit. Recently the clothes seemed not to have been dryed on a long enough cycle - moisture still present after cycle ended. All at once the unit won't start. Upon pressing the start button, there is an audible click together with the illumination of the "sensing" light. I have taken unit apart and thoroughly dusted by vacuuming and through the use of compressd air. Reassembled - and still won't start/same symptoms. Is there a defective part thatb should be replaced? Please advise - and thank you very much.