Sounds like a bad thermocouple.
													
																	Dyna glo propane heater won t stay lit. 
								
	
		
	
																	If i hold the gas knob down it will only emanate a small yellow flame compared to the strong blue flame of last year. 
																	The problem may be a genuine defect or it could be an issue with the sensor. 
																	My gas heater will not stay lit after i hold the turn on valve the required time. 
																	Adjusting and replacing the thermocouple the thermocouple is a heat sensitive. 
															
													
								
	
		
	
																	If the pilot won t stay lit it may be because there s a draft but more often it s a problem with the thermocouple. 
																	How the fix your dyna glo propane heater if it won t light up. 
																	Carbon monoxide will kill you it has to be flued correctly. 
																	Dyna glo rmc fa150dgd 01 heater 120 000 150 000 btu s can you operate the heater inside a garage without worrying about carbon monoxide. 
															
													
								
	
		
	
																	When a propane heater won t stay lit often what is happening is that the propane heater may sense that the flame is defective in some way triggering the propane heater s safety functions and causing it to shut off. 
																	Right next to the burner when it s not sensing the gas burner shuts for safety. 
																	Dyna glo wall mount propane heater won t stay lit pilot light. 
																	Turn the control knob of your heater to the lo position if you hear a whistling noise from your heater after it s lit. 
															
													
								
	
		
	
																	Your heater may need to warm up for a minute or so. 
																	The garage door is metal with no insulation. 
																	Contact your propane gas company and have a qualified technician check the gas line if the whistling continues. 
																	Patio heater pilot light won t start or stay lit duration. 
															
													
								
	
		
	
																	The thermocouple is wired to a snap disc thermostat see photos here press j to jump to the feed. 
																	The whistling could also mean your heater has air in the gas line. 
																	It is a little rod that senses the flame and keeps the gas valve open in normal operation. 
																	Brad tinker 233 967 views.