Pilot Light Does Not Stay Lit – Bad Thermocouple – Gas Company Inspection

My tenant did not have their gas on for a period of time. The gas company came today and turned on the gas and as a courtesy tried to light the furnace.

Unfortunately it would not stay lit.  He tried twice, each time holding the match to the pilot light for close to 30 seconds. 

I needed to call my plumber and as expected it was a bad thermocouple which needed to be replaced. 

That is the most common reason why a pilot light will not stay lit.