Dometic Fan-Tastic Vent 3350 Parts Diagram & Wiring

The Dometic Fan-Tastic Vent 3350 is a powered-lid RV roof fan with a three-speed ventilation motor, thermostat, reversible airflow and rain sensor. Its dome motor, fan motor and lid switch perform different jobs. Use the complete model and serial label to choose the correct replacement, especially on earlier installations with different trim colours and electrical connectors.

View Available Parts With Photos

Dometic 3350 exploded parts drawing

Use the model-specific numbered reference table below to identify the roof dome, lift arm, screen, fan motor, switches and rain sensor. Several components are available through the linked UsedRVParts listings.

Open Dometic's installation and service manual (PDF)

3350 replacement-part numbers

For item 15, the K6010-80 off-white motor and K6010-81 white motor are separate listings. Select the correct finish and electrical/mounting configuration.

Model 3350 wiring diagram

The Dometic 3350 wiring schematic shows the 12 VDC supply, 4 A slow-blow fuse, thermostatic control, reversible fan switch, rain sensor, dome safety switch and 17 RPM lift motor. The circuit board is labelled 9050-90 “A” on the 2014 factory schematic. The drawing helps identify wiring positions and should be followed when servicing the electrical system.

Open the model 3350 wiring diagram (PDF)

Part-number reference

How to tell which motor to replace

The K8017-00 is the fan-blade motor on the applicable assembly. The separate K6010-81 is the white 17 RPM motor that opens and closes a compatible roof lid. The K6010-80 is the off-white lift-motor version. Choose the replacement by the original component, colour, motor connections and fan revision rather than replacing one motor with the other.

Speed switch, dome switch and rain sensor

The K1031-05 operates the fan-speed circuit. The separate K1122-05 senses the lid position. The factory 3350 electrical drawing also identifies the rain-sensor circuit beneath the dome. Match the original sensor and board configuration when repairing that system.

Maintenance and related diagrams

Disconnect 12 V power before repairing the fan's wiring, switches or motors. Dometic recommends cleaning the removable screen and blades with mild soap and water and inspecting the dome seal periodically. Use the manufacturer's instructions for seal treatment; petroleum-based products are not suitable for the specified seal-maintenance steps.

For a simpler manual-lift vent, see the Fan-Tastic Create-A-Breeze 8000 / 1200 parts guide. For a remote-operated model, see the Fan-Tastic 7350 repair diagram. The general Fan-Tastic Vent parts reference covers additional model families.

Photographs of the replacement parts

These original part numbers lead to their corresponding UsedRVParts product pages. Compare the component shape and wiring shown on the listing with the part installed in your roof vent.

White dome-lift motorK6010-81

17 RPM lift-motor assembly for the matching white powered-lid configuration.

View this part

Ventilation fan motorK8017-00

Runs the fan blade; a separate motor from the roof-dome lift.

View this part

Roof-dome lift armK8011-05

Metal lift arm with service hardware for a matching lid mechanism.

View this part

Three-speed switchK1031-05

Fan-speed control switch; match its terminals and switch positions.

View this part

Dome-position switchK1122-05

Lid safety switch also shown as K112205 without a hyphen.

View this part

Fuse holder assemblyK9018-09

Holds the slow-blow circuit fuse; check the fuse rating separately.

View this part