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- Sat Nov 13, 2021 4:30 pm
- Forum: CPAP and Sleep Apnea Message Board
- Topic: HDM Z1 Have a fault 33 code. Anyone know how to fix it?
- Replies: 63
- Views: 92028
Re: HDM Z1 Have a fault 33 code. Anyone know how to fix it?
I have the same problem. Last time I used it was approx Feb of this year. It sat on the shelf for 6 months. Now it has fault code 33. Based on the reports in this site, it seems like there is a Kill Date-Switch built into in the unit. That is to say, the fact that all of these units have the same sy...