Previous Forums and Content ArchiveWe've reorganized the categories for 2019 and beyond, but all of the great content, information, answers, and discussions from the old forums are still intact - including attachments!
I note that you posted back in March regarding an issue relating to configuration of your Guardian CO Monitor. Did you ever get it resolved? If so, can you provide any guidance? I'm having a very similar issue where my 353D-101 displays 165ppm when in fresh air.
Australian RV-9A Builder