Fujitsu Waterstage 94 fault code
Fujitsu Waterstage heat pumps
What the Fujitsu Waterstage 94 fault code means, from the manufacturer's own service literature, and the UK models it applies to.
What it means
Current trip (permanent stoppage)
Source: Fujitsu Waterstage Comfort D&T Manual DA_CF001EF, §Control System pp.03-2…03-4 (official-distributor mirrors) — numeric display codes with Fujitsu's own reset and runs-despite-error columns, plus the interface-card LED table
UK models this code applies to
Tap yours to open 94 on that machine.
94 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
94 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 94 on your machine →Free, no sign-up. We don't hold a chart for this code yet — pick the model for its manual section.
Or watch one get chased — free demo →
Or use it in your browser on any phone or laptop.
Related codes
- 77Heat sink thermistor error (PFC)
- 78Expansion valve thermistor error
- 83BSB short circuit
- 84Current sensor error
- 86Pressure sensor error / Pressure switch error
- 95Detection of compressor position error (permanent stoppage)
- 97Outdoor unit fan motor error
- 212Internal communication failure
- 441BX31 no function
- 442BX24 no function