One common cause of a loud bang or boom is a dirty burner in your furnace.
													
																	Carrier furnace inducer fan noise. 
									
	
		
	
																	If the unit will turn on but the blower motor is not turning on there are a couple of ways to check if the draft inducer motor has gone bad. 
																	If you hear a sound like a loud bang or boom coming from your furnace you would certainly be wise to be concerned. 
																	A failing inducer motor may create a noise shortly after a heating cycle begins. 
																	The blower wheel blows air out of the furnace and through the house. 
															
													
									
	
		
	
																	The specs on it are 1 8 hp 810 rpm 208 230v a 0 90 cap 5 00 read more. 
																	The original condenser fan motor is a carrier 5kcp39efy465s. 
																	Carrier 58mvp inducer fan noise. 
																	The blower wheel is attached to the blower motor shaft with a set screw. 
															
													
									
	
		
	
																	If the set screw is loose the blower wheel will wobble on. 
																	I am trying to replace my condenser fan motor unit is a carrier 25hbr342a300. 
																	Having dirty burners in your furnace can cause a delay in ignition. 
																	This could be a tapping noise or a humming or whirring sound. 
															
													
									
	
		
	
																	The motor shaft and the wheel will be noisy as it turns. 
																	So the gas will build up instead of the gas igniting immediately.