If you re handy with electronics you may be able to fix these problems but if not it s time to call a pro.
													
																	Carrier ac indoor unit displays error code e1. 
									
	
		
	
																	If an e1 error code shows up in your air handler that means there is a communication error either with the indoor unit or the outdoor unit. 
																	Other causes for an e1 error code include loose internal connections a communication problem between the indoor and outdoor parts of the unit and a faulty control panel. 
																	E1 ol 2 time indoor outdoor units communication error. 
																	Carrier air conditioning error code eo ol 1 time indoor unit eeprom parameter error. 
															
													
									
	
		
	
																	E3 ol 4 time the speed of the indoor fan has gone out of control. 
																	Troubleshooting an e1 error code.