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Toshiba Mini-Split Error Codes: Full 2026 List

by Dua Jones April 28, 2026

Toshiba mini-splits display fault codes on the indoor unit's LED display or via indicator light blink patterns. Toshiba's ductless lineup in North America is manufactured under a partnership with Carrier — their systems share engineering heritage with the broader Carrier/UTC HVAC platform. Error codes are consistent across Toshiba's residential ductless range. This guide covers the most common Toshiba mini-split error codes and recommended first steps.

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Common Toshiba Mini-Split Error Codes

Error Code	Meaning	DIY Fix?	First Step
E01	Indoor unit PCB fault	No	Reset at breaker; call tech if recurring
E02	Indoor unit fan motor fault	Partially	Check for obstructions; call technician
E03	Freeze protection — indoor coil too cold	Yes	Clean filter; thaw coil 2 hrs; restart
E04	Drain fault / condensate blockage	Yes	Clear condensate drain line
E06	Communication error (indoor to outdoor)	Partially	Reset at breaker; check signal wire connections
E07	Indoor intake temperature sensor fault	No	Reset; call tech if recurring — thermistor
E08	Indoor coil temperature sensor fault	No	Call technician — thermistor replacement
F01	Outdoor unit PCB fault	No	Reset; call tech if recurring
F03	High pressure protection	Partially	Clear outdoor unit airflow; reset at breaker
F04	Low pressure / refrigerant loss	No	Call EPA-certified technician — refrigerant check
F05	Outdoor fan motor fault	Partially	Check for debris at outdoor unit; call tech
F06	Outdoor temperature sensor fault	No	Reset; call tech if recurring

Frequently Asked Questions

My Toshiba mini-split shows E03 — what should I do?

E03 is the freeze protection code — the indoor evaporator coil has dropped below the safe operating temperature, usually because restricted airflow is preventing the coil from absorbing room heat. Clean the air filter, turn the unit off and let any ice on the coil melt completely (allow 2 hours), then restart. If E03 returns after cleaning, airflow restriction from a fan motor issue or low refrigerant are the next things to investigate.

Does Toshiba have a service network in North America?

Toshiba's residential ductless systems are sold and serviced through Carrier's distribution network in North America, which gives access to a wider service network than Toshiba would have independently. Carrier Factory Authorized Dealers can typically service Toshiba residential ductless equipment. Confirm service availability in your area before purchasing.