Fan And Lid Does Not Operate On MaxxFan 4751KS Roof Vent

Question

Question:

Fan opens lid but will not turn on blades or close lid?

asked by: Fernando G

0

Expert Reply:

I recommend verifying if the fan is getting 12v to the motor when the button is pushed. You can use # PT29ZR to verify if you're receiving 12 volts.

If you're not receiving 12v, then you likely have a bad motor, which you can replace it with # MA10-20270.

If you're receiving 12v to your motor, I suggest next checking your operator mechanism. You'll need to head to the roof, open the cover manually, and visually inspect for damage.

If it's broken, you can use the Replacement Operator Mechanism for MaxxAir MaxxFan Plus or MaxxFan Deluxe Roof Vents # MA10-20281K-1AF.

expert reply by: Bryce D

0

Answer 1

The two most likely causes of a MaxxAir vent fan lid not opening or closing are either going to be a lift motor or operator failure. I recommend removing the motor and applying power directly to this to see if the shaft turns. If not, you know the…

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Answer 2

Sounds like your roof vent lid isn't closing all the way when you ask it to which is why the fan isn't shutting off and also explains the clicking of the operator as it's trying to close it. In the past we've seen similar issues to…

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Answer 3

For your 4900K model you will want the Replacement Operator Mechanism for MaxxAir MaxxFan Plus or MaxxFan Deluxe Roof Vents #MA10-20281K-1AF since your model isn't opening.

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Answer 4

If your roof vent lid won't open, even when using the manual lift knob, then the gears of the lift operator are most likely stripped out and the lift operator will need to be replaced. The Replacement Operator Mechanism #MA10-20281K-1AF is…

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Answer 5

The serial number should be located on the base of the unit under the screen. I would need this to confirm parts but it's likely the correct one for you is the Replacement Operator Mechanism for MaxxAir MaxxFan Plus or MaxxFan Deluxe Roof Vents…

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Answer 6

It does sound like you need a new circuit board for the 4951KS that you have based on what you described from your vent. So for that you'd want the part #MA10A04751KS and you'd be set.

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Answer 7

Sounds like you have a damaged or worn out roof vent operator and need to replace it with the part #MA10-20281K-1AF since you said the motor doesn't want to fully open or close the lid and it's difficult to turn by hand.

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Answer 8

Is the circuit board you installed the #MA10A04751KS? If the motor won't turn on even with the board bypassed that would mean it would need to be replaced as well with the part #MA10-20968.

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Answer 9

If the lid no longer opens or closes even when using the manual knob then that means the operator mechanism is bad which is rather common to have to replace. The part you'll need for this is the Replacement Operator Mechanism for MaxxAir MaxxFan…

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Answer 10

The correct lift motor you need for your Maxxair roof vent is the part #MA10-20270.

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Answer 11

Based on what you are describing it sounds like this is coming from the motor. There wouldn't be anything that would leak out of the operator mechanism. I recommend wiping it up and keeping an eye on it to see if you can better identify where…

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Answer 12

The two most likely causes of a MaxxAir vent fan lid not opening or closing are either going to be a lift motor or operator failure. I recommend removing the motor and applying power directly to this to see if the shaft turns. If not, you know the…

view full answer...

Fan And Lid Does Not Operate On MaxxFan 4751KS Roof Vent

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