Koldfront Air Conditioner Error codes


Window Air Conditioner with Supplemental Heater

AS- Room temperature sensor error

– Unplug the unit and plug it back in.

– If the error repeats call for service.

– In Fan only mode it will display “LO” or “HI”.

– Evaporator temperature sensor error

– Unplug the unit and plug it back in.

– If the error repeats, call for service.

HS-Electric Heating Sensor Error

– unplug the unit and plug it back in.




– if the error repeats, call for service.


Portable Air Conditioner

Error Codes on LED Display

E1 – Room temperature sensor error.

E2 – Evaporator temperature sensor error.

E3 – Condenser temperature sensor error.

E4 – Display panel communication error.

For all error codes, unplug the unit and plug it back in. If the error repeats call for service.

Protection Codes on LED Display

P1 – Water reservoir full. Connect the drain hose and drain the collected water away. If the error repeats call for service.








Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.