How do I clear error 158 on a Fisher & Paykel CPAP machine?
Answer
Error 158 on Fisher & Paykel CPAP devices often relates to moisture or water reaching the blower area. Power the machine off, unplug it, remove the water chamber, and gently clear water from the unit before trying again. If the error returns, contact your equipment provider.
Before you start: stop right away if…
- Keep water away from electrical connections and never operate the CPAP if water may still be inside the blower path.
- If therapy cannot be delayed safely, contact your equipment provider instead of relying only on troubleshooting.
Follow these steps
Turn the CPAP off
Stop therapy and power the Fisher & Paykel CPAP off using the device controls so the blower is fully stopped before unplugging.
You should see: The machine is off and no longer trying to run.
Unplug the power
Unplug the power cord from the back of the machine and from the wall or power supply so there is no power while you handle the water chamber.
You should see: The display is dark and the unit has no power.
Remove the water chamber and drain carefully
Remove the water chamber, leave the lid area open as directed in your model’s instructions, and gently tip the unit as recommended to clear water away from the blower path. Do not shake violently or pour liquid into openings.
You should see: Visible water is cleared from the chamber path and no pooled water remains where it should not be.
Reassemble and test
Refit a correctly filled water chamber if your setup uses one, reconnect power, turn the machine on, and check whether error 158 is gone.
You should see: The machine starts normally without error 158, or the code returns immediately.
Contact your equipment provider if the error persists
If error 158 returns after drying and reassembly, stop repeated self-repairs and contact the CPAP supplier or clinician for service guidance.
You should see: You have an official next step for repair, loaner equipment, or inspection.
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Extra tips
What to look for: Error code 158 on the Fisher & Paykel display, water in or near the chamber path, and whether the error returns immediately after restart.
Before you change anything: Confirm the device is a Fisher & Paykel CPAP showing error 158. Work on a dry surface and keep liquids away from the power supply. Do not run the machine if water may still be inside the blower path. Follow your supplier’s guidance if you depend on nightly therapy.