How Long Does Service Take

Standard O2 service has a very quick turn-around.  KORR will service and calibrate your unit within 3 days of receipt. Diagnostic service for mechanical problems may take several days depending on the repair required.
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General CardioCoach Software Issues

Download any recent software updates from default settings.Restart computer and CardioCoach.Send Error Report.   If software issues continue, you will need to send an error report to KORR’s technical staff for troubleshooting.  Simpl...
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Registration code expired

On the older versions of CardioCoach software, some Microsoft updates will trigger the message to enter in your original registration code again.  This code is located inside the CD case containing the software. If you cannot locate that case, send your unit serial number to customersupport@korr....
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Heart rate pickup

Polar coded heart rate pick-ups.  The culprit for inconsistent heart rate pick-up is usually the heart rate strap:  Either the battery is dead or the wiring in the strap has been damaged.  Both the battery and the strap can be easily replaced.
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Error Codes

Error codes on your device are key to troubleshooting problems. Contact KORR customer support for assistance or refer to your user manual for a complete list of error codes and resolutions.
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How to send unit in for service

Log onto  If you don’t have an account, simply use your email and a password to create one.  Multiple users within an organization can have their own accounts on the KORR site.  Submit Service Request.  Navigate to the online service portal at
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Routine O2 sensor replacement and calibration

All KORR products require oxygen sensor replacement and calibration every 12-24 months regardless of usage. If your unit shows an error code 102 or does not complete the calibration cycle, your unit needs a new O2 sensor. The unit cannot function once the sensor has expired, so it may be wise to re...
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