After replacing The Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents # MA10A04751KS, and the motor still does not open the lid you will need to replace the motor. The Replacement 12-Volt Variable Speed Fan Motor for MaxxAir MaxxFan RV Roof Vents # MA10-20968 will replace the 12-volt DC variable-speed fan motor on your MaxxFan 4791KS.
I attached a review video link below. view full answer...
I have a solution for you, but you'll need to take a few things into consideration to determine whether or not this will work for you.
You could use a hitch like the Curt Adjustable Width Trailer Hitch Receiver for RVs # 13703 which is designed for trailer and RV frames 22"-72" wide and has a 3500-lb towing capacity. This hitch can be mounted on the frame of your Open Range 427BHS, however I would first consult with your trailer's owners manual to determine whether or not the frame is... view full answer...