Dometic ACC3100 ventilation does not switch on prep

Use the official Dometic ACC3100 no-switch-on support page to document normal controls, display state, and service-call details.

Owner-safe checklist

• Record the ACC3100 model, display state, app state, selected mode, power context from normal monitors, and whether the fan ever starts.
• Stop use and record photos if water entry, burning odor, unusual noise, or repeated nonresponse appears.
• Use Dometic support or qualified RV ventilation service for mounted equipment, roof hardware, parts, or powered service decisions.

Official sources

• Dometic ACC3100 Ventilation System Does Not Switch On Support