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- On screen symbols
Why does my GastroCH4ECK show a red cross and a circles with a code inside it?
CH4 Sensor Sync Error On GastroCH4ECK
Try pressing the retry button. If the error occurs more than 3 times, please restart the unit.
If the problem persists or has not been resolved by the information provided above, please contact your local distributor for more information. Find out who your local distributor is from our website here.