WatchPAT Device Error — General Hardware Fault

What Does This Error Mean?

A Device Error on the WatchPAT indicates a general hardware or firmware fault that is preventing the device from operating correctly. This typically means the device needs to be replaced or returned to the clinic.

Affected Models

WatchPAT ONE
WatchPAT 300
WatchPAT 200

Common Causes

Device has been physically damaged (dropped, wet)
Internal component has failed
Firmware is corrupted
Device memory is full or corrupted
Compatibility issue with a new version of the companion app

How to Fix It

Do not attempt a study with the device error showing

A device error means the recording cannot be trusted. Using it anyway may give inaccurate results and delay your diagnosis.
Restart the device

Hold the power button for 5–10 seconds to power off, then turn it back on. If the error clears and a self-test passes, the device may be usable.
Check for app compatibility

If a recent app update preceded the error, try updating or rolling back the companion app.
Contact the clinic or Itamar Medical support

Report the device error to the clinic that prescribed the test. For WatchPAT ONE, they will provide a replacement unit. For WatchPAT 300/200, they will arrange repair or replacement through Itamar Medical.

When to Call a Professional

Yes — contact the prescribing clinic or Itamar Medical support. Do not attempt to open or repair the device.

WatchPAT General Device Error

A Device Error is a catch-all fault code indicating that the WatchPAT has detected an internal problem that prevents reliable operation. Unlike sensor or battery errors (which have straightforward user-level fixes), a device error typically means hardware has failed.

What You Should NOT Do

Do not try to open the device
Do not try to proceed with a sleep study despite the error
Do not apply pressure or heat to try to fix the device

What the Clinic Will Do

For WatchPAT ONE (disposable): the clinic will simply issue a replacement device and schedule a new study night.

For WatchPAT 300/200 (reusable): the device will be returned to Itamar Medical for repair or replacement under warranty.

In both cases, a device error is handled by the clinic or manufacturer — not the patient.

Frequently Asked Questions

My WatchPAT got wet — can it still be used?

WatchPAT devices are not waterproof. If the device got wet (sweat, a drink, water), dry it gently and allow it to air-dry for several hours before attempting to power it on. Contact the clinic if a device error appears after moisture exposure.

Who do I contact if the clinic that gave me the WatchPAT is not responding?

Itamar Medical has direct customer support that can assist patients. You can find their contact information on the official Itamar Medical website (itamar-medical.com).