Dometic Fan-Tastic Vent 2
Official technical documentation and workshop diagnostics for Dometic Fan-Tastic Vent 2.
View official manual on manufacturer's site ↗Technical Specifications
ElectricalInstaller supplies a 15 A fuse. Black wire = positive and fused, White wire = negative or ground.
Gas Or PressureNot applicable
Capacities DimensionsNight light mode up to 50 lm; Room light mode up to 1600 lm.
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | E1 - communication with the AC thermostat has been lost | Communication failure between vent control board and AC thermostat. | Check wiring connections and clear error code by pressing and holding settings buttons simultaneously. | DIY Safe |
N/A | E2 Thermistor error – no connection / E3 Thermistor error – short circuit | Faulty thermistor wiring, loose connection, or short circuit. | Inspect thermistor wiring and connections, replace if damaged. | DIY Safe |
N/A | E4 - Bluetooth lost with the remote / E5 - Bluetooth lost with the mobile app | Wireless connection dropped or out of range. | Re-establish Bluetooth pairing mode by long pressing pairing buttons simultaneously. | DIY Safe |
N/A | E6 Rain sensor over – activation | Rain sensor continuously triggered or shorted by moisture. | Inspect rain sensor surface, dry thoroughly, and test activation. | DIY Safe |
N/A | E7 - the control board is running too hot | Control board overheating due to excessive ambient temperature or restricted airflow. | Ensure proper ventilation around the control unit and allow the unit to cool. | DIY Safe |
N/A | E8 Lift motor error – no current / E9 Lift motor overcurrent | Dome mechanism is jammed, obstructed, or lift motor has electrical fault. | Check dome lid for physical obstructions or debris, clear track, and inspect motor current draw. | DIY Safe |
N/A | E10 Motion sensor failure | Motion sensor hardware failure or obstruction (Platinum models). | Check sensor lens for dirt or blockage, reset unit power. | DIY Safe |
N/A | E11 - fan driver error / E15 - fan control error / E16 - fan overtemperature / E17 - fan motor locked / E18 - fan phase lost / E19 - fan communication error | Fan motor failure, mechanical binding of fan blades, or electronic driver fault. | Inspect fan blades for physical blockage or binding. Clear error code or replace fan assembly if driver is faulty. | DIY Check / Tech Fallback |
N/A | E12 - critical fan overvoltage / E13 - fan overvoltage / E21 - overvoltage | System supply voltage exceeds operating thresholds. | Check motorhome electrical system and converter output voltage. | DIY Safe |
N/A | E14 Fan undervoltage / E20 Undervoltage | Low system voltage supply. | Check battery charge status and input power connections. | DIY Safe |