Troubleshooting A MaxxAir MaxxFan 4951KS Lid That Won't Open Or Close

Question:

The Maxxfan 4951KS in my 2020 Grand Design 28BH Fifth Wheel is having issues with the lid lift mechanism. I returned to my trailer after a rain storm to find the fan still running. I was surprised since it has a rain detector. I hit the close button on the 4 button remote and it beeped but didn’t close. So I manually closed it by turning the knob. Then I hit the open button to see if that would work. At first it would just beep and nothing would happen but 15 minutes later I tried again and it opened the lid but much slower than normal. It still wouldn’t close. Now a day later it won’t open or close via the button but it does beep once when you try and it also won’t open manually. Any suggestions as to which parts I need to replace to get the lid operating again?

asked by: Bobby

Expert Reply:

Most likely the circuit board on your MaxxAir MaxxFan 4951KS is malfunctioning and can be replaced with the Replacement Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents # MA10A04751KS. Since you said it was having issues manually opening as well then the gears of your lift operator may also be worn and in need of the # MA10-20281K-1AF for the replacement.

expert reply by: Kevin C