Daikin Air conditioner F3 error
F3 is listed in Daikin's official, model-scoped air-conditioner fault table as high discharge-pipe temperature control.
Reference source listed as Daikin official FTX25KMV1B / FTX35KMV1B operation manual 3P393186-11R.
Open official source ↗high discharge-pipe temperature control
Stop if there is smoke, a burning smell, damaged wiring, repeated breaker operation, or refrigerant leakage. Do not open fixed electrical or refrigerant panels. Record the code, switch the air conditioner off, and contact the Daikin service shop; the manual says not to repair, dismantle, reinstall, or modify the unit yourself.
Typical symptoms
Fault area and what the code does not prove
Separate the manufacturer-defined condition from components that still need exact-model diagnosis.
Safe next steps
- 1Confirm the exact Daikin Air conditioner F3 model and displayed code before taking action.
- 2Keep the appliance in a safe state and use only the external checks named in the official source.
- 3If the condition remains, stop and arrange qualified service; do not open panels or bypass a safety device.
Step-by-step diagnosis
- 1Photograph the complete F3 display before changing controls or removing power
- 2Confirm that the full model number is covered by this scope: Daikin room air-conditioner models FTX25KMV1B and FTX35KMV1B
- 3Confirm that the observed condition matches the published meaning: high discharge-pipe temperature control
- 4Published check — Do not open fixed electrical or refrigerant panels
- 5Published check — Record the code, switch the air conditioner off, and contact the Daikin service shop
- 6Published check — the manual says not to repair, dismantle, reinstall, or modify the unit yourself
- 7Stop at the published service boundary after these actions
- 8do not add a restart or test cycle that Daikin does not specify for F3
- 9Published check — Give service the F3 photo, full model and serial number, when it appeared, and the result of every published external check
- 10Stop at the published service boundary after these actions; do not add a restart or test cycle that Daikin does not specify for F3
Service-safe actions
- 1Do not open fixed electrical or refrigerant panels
- 2Record the code, switch the air conditioner off, and contact the Daikin service shop
- 3the manual says not to repair, dismantle, reinstall, or modify the unit yourself
- 4Give service the F3 photo, full model and serial number, when it appeared, and the result of every published external check
Repair planning
F3 cost planning: €0 for cooldown and external checks. If F3 returns at normal conditions, €140–€320 is a typical Europe planning range for diagnosis before parts; it is not Daikin pricing.
F3 time plan: 15–60 minutes for safe cooldown or temperature normalization; professional electrical diagnosis usually takes 30–90 minutes.
Timer, Exact-model cooldown and ventilation instructions, No live temperature-sensor or mains-voltage test equipment
F3 parts decision: None for cooldown or external ventilation checks. F3 may identify a temperature-related area, but it does not establish the exact sensor, heater, fan, or control part.
What not to do
- Do not defeat thermal protection, apply external heat, test a live sensor circuit, or restart repeatedly before the appliance has cooled
- Do not run an extra test cycle after the source tells you to stop or arrange service for F3
Preventive maintenance
- 1Follow the exact Daikin maintenance schedule for the air conditioner and keep the model, serial number, and service history available
- 2If F3 begins recurring despite the documented maintenance, stop repeating the same action and request exact-model diagnosis
Frequently asked questions
What exactly does F3 identify?
Daikin identifies it as high discharge-pipe temperature control.
Which action is actually supported for F3?
Do not open fixed electrical or refrigerant panels; Record the code, switch the air conditioner off, and contact the Daikin service shop; the manual says not to repair, dismantle, reinstall, or modify the unit yourself; Give service the F3 photo, full model and serial number, when it appeared, and the result of every published external check.
Can I run another test after F3?
Not unless the official procedure above explicitly includes it. Complete the safe external actions, then keep the appliance stopped at the service boundary.
Does F3 prove which part failed?
No. It identifies “high discharge-pipe temperature control”; parts are selected only after the exact model and failed function are confirmed.
What information should accompany a service request?
The F3 photo, full model and serial number, the operating stage when it appeared, and the result of each published check.
Did this guide fix your appliance?
Your anonymous response helps us show which repairs work in the real world. One current response is kept per guide.