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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 Bedfont or your local distributor for more advice.