F1
Panasonic Split AC
Severity: ModerateWhat Does This Error Mean?
F1 on a Panasonic AC means the indoor ambient temperature thermistor has a fault. This sensor reads room temperature so the AC can maintain the temperature you set on the remote. Panasonic stops the system when F1 appears — without an accurate room temperature reading, cooling cannot be controlled safely.
Affected Models
- Panasonic Inverter Split AC (all capacities)
- Panasonic CS-SU series
- Panasonic CS-YU series
- Panasonic CS-XU series
- Panasonic NanoeX series
Common Causes
- Indoor ambient thermistor failed — resistance reading outside the normal range
- Thermistor connector loose or pulled out at the indoor PCB
- Thermistor wire damaged during installation or annual service
- Dust or debris on the thermistor probe causing false readings
- Indoor PCB fault causing incorrect reading of the ambient sensor
How to Fix It
-
Switch off at the remote and circuit breaker. Wait 5 minutes and restart.
If F1 clears after a reset and does not return, it was a transient error. Monitor over the next few uses.
-
Clean the indoor unit air filter and front panel.
The ambient thermistor reads room air drawn through the front panel. A dirty panel or blocked filter affects sensor readings.
-
Call Panasonic service (1800-103-1333) if F1 persists.
Provide model number and purchase date when calling. The model number is on the sticker on the indoor unit.
When to Call a Professional
F1 requires a Panasonic authorised technician. Panasonic India customer care: 1800-103-1333. The technician will test the ambient thermistor resistance (comparing against the temperature-resistance chart in the service manual) and replace it if faulty.
Frequently Asked Questions
How much does Panasonic F1 repair cost in India?
An indoor ambient thermistor typically costs Rs 300–600 for the part. With the Panasonic service visit charge and labour, total repair is usually Rs 1,200–2,800. Under warranty, parts and labour are covered at no charge.