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PhilC
Thanks everyone for their replies - I think I understand what's going on now. I had a look at the air setting and it's down at 4 (which coincidentally is the default setting in the manual), so plenty of scope to increase it to get the CO2 down.
I'm trying a polite email to the engineer's boss, along the lines of "these are the results on the invoice, please comment" not "engineers on the internet reckon your engineer didn't do his job properly" and I'm hoping he'll do the decent thing and send someone out to finish the job properly
Failing that, I'm on the Devon\Cornwall border, just off the A30. (good idea, Millsy!)
I'm trying a polite email to the engineer's boss, along the lines of "these are the results on the invoice, please comment" not "engineers on the internet reckon your engineer didn't do his job properly" and I'm hoping he'll do the decent thing and send someone out to finish the job properly
Failing that, I'm on the Devon\Cornwall border, just off the A30. (good idea, Millsy!)