I get that, but it doesn’t really explain it. The machines don’t need regular fixing, they’re down because the software has tighter specs for temp control and the required cleaning schedule mean it takes hours to clean and get back to proper temp, like 12 hours IIRC.
I other companies, the same machines don’t have the same tight temp tolerances and they work fine.
There’s a great YouTube on this.
The repair issue is related, but not a root cause of machines being down. Most are down for the cleaning cycle issue.
The repair issue is McD’s requiring a specific vendor to repair them, and there are certain errors that require a service call for no good reason. A developer built a device to read the codes and reset them, not sure where they stand today.