I have two Heat And Glo fireplaces that won't stay lit.  The primary one I've already changed the pilot and spark igniter, after approximately 18 minutes the furnace turns off automatically.  I have a suspicion that the electronics may be so old that they need to be replaced.  The units are 17 years old, and they are NOT the style that use a wireless remote.
	
		
			
		
		
	
				
			 
	 
	 
 
		 
 
		