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.