Problem with Kane 458s plumbing advice

Problem with Kane 458s Issues with Kane 458s

Bought unit back end of April 2022.

1st. Problem sent back to Kane on 7th July. After flue sampling it would take 2 minutes to slowly drop coppm. Then hang at 4 coppm for next to 3 to 4 minute's before zeroing in fresh air. Also ratio would jump around.

Kane fitted a new CO sensor.

2nd. Problem sent back to kane on 6/12/2022. On older pre-condensing boilers I'm getting unbelievable clean ratios of.
Example given:

Ideal Mexico rs 80
Co2 7.9%
Coppm 10
Ratio 0.00001

Baxi solo 2 60pf
Co2 6.7%
Coppm 5
Ratio 0.0000

These are both fixed rate burners which I would expect ratios of between 0.0006 to 0.0030. Both are pre-condensing boilers.

I'm beginning to lose confidence with this analyser. My previous 455 I had no issues with.

Kane has had the analyser back for service now for 6 days. I phoned kane today and somebody was supposed to ring back but know one has.

Has anybody had the same issues

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