Toshiba 00 fault code
Toshiba air conditioning
What the Toshiba 00 fault code means, from the manufacturer's own service literature, and the UK models it applies to.
What it means
Stage-one block code read from the indoor lamps, not the remote. OPERATION flashing at 5 Hz on its own. Toshiba: "Protective circuit operation for indoor P.C. board".
Safety: Toshiba Note 2: where item B (this block) occurs together with C or part of E, the display gives PRIORITY to B — so 00 can be hiding a 01 or 03. Clear the indoor board before assuming it is the only fault.
Source: Toshiba service manual SVM-19001-3 (Seiya) / SVM-18009 (Shorai P) §11-3, Table 11-3-1 (flashing-LED block codes)
UK models this code applies to
Tap yours to open 00 on that machine.
Wall-mounted79
Cassettes17
Ducted20
Ceiling suspended10
Floor consoles3
Floor-standing4
Indoor and outdoor pairs1
Multi-split outdoor units13
Outdoor units108
Other models30
00 on these comes from each model's own manual, which may not match the meaning above — tap yours to read it.
Now the harder half: proving what caused it
00 names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.
Chase 00 on your machine →Free, no sign-up. Pick the model: where we hold Toshiba's own chart for it, it takes you through one question at a time.
Or watch one get chased — free demo →Related codes
- 0CTA room sensor short-circuit or disconnection
- 0dTC indoor heat-exchanger sensor fault
- 01OPERATION + TIMER (White) flashing 5 Hz: connecting cable / serial…
- 1AOutdoor fan motor fault
- 1bTO outside-air sensor fault
- 1CCompressor drive output error
- 1dCompressor does not rotate
- 1EDischarge temperature exceeded 117 °C
- 1FCompressor high current at minimum frequency
- 02OPERATION lamp flashing 5 Hz: protective circuit, OUTDOOR P.C. board