Bosch does not sell manuals; they provide them for free exclusively to owners.
While scanning our copy of the exclusive PDF, we found three tricks most owners never discover:
Cause: The Intelligent Eco mode may be active. Solution: The exclusive manual explains that during low-usage hours (e.g., 2 AM to 6 AM), the unit enters a silent mode. This is normal. Do not call service until you verify this in Section 4.2 of the exclusive PDF.