MaxxFan Model 4751KS Will Not Shut Off

Question

Question:

My vent will open and shut but can’t shut off the fan nor control the speed. It runs on high all the time. I had to pull the fuse to stop it. I disconnected the wires to the fan and the vent will still open and shut from the control panel. I bought a new control panel from you folks and it made no difference.

asked by: Carol A

0

Expert Reply:

I took a look at your order and saw you had purchased the Replacement Key Wall Control part # MA00A03550K but the issue you are having with your MaxxFan Model 4751KS is the circuit board, the Replacement Circuit Board part # MA10A04751KS so this what you need to replace.

expert reply by: Conner L

0

Tank

3/19/2020

U dont think it could be the switch

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Chris R.

3/20/2020

That's a possibility, for sure. Have you checked the wiring behind the switch? There could be a short coming from there - make sure it's securely grounded and that there aren't any loose connections or frayed wiring.

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Tank

3/19/2020

I couldnt find any loose connection or frayed wires. The fan motor pulls 3.4 amps on startup on all speeds only 2nd speed turns lights off they flicker on other 3 speeds then com on

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Chris R.

3/19/2020

This is a pretty strange/unique situation. I honestly think the next step is to try and have a local electrician take a look at everything. I'm really not sure what could be causing just that second speed setting to dim that lights like that. It could be coming from the fan, the bathroom light, or the wiring/power in between.

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Tank

3/18/2020

We have a wall mount control for our maxair. On the second speed it dims the bathroom light to the point it gets dark in bathroom. The other speeds are fine. The lights are L E D the rv is 2018 Montana.

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Chris R.

3/19/2020

That's a new one to me....It certainly sounds like the bathroom light and the fan are sharing the same circuit, and for some reason when the second speed is selected, it's pulling power away from the light, or at least causing the voltage there to drop for some reason. There has to be some kind of wiring issue up there that's causing a type of short. I would inspect both it and the light's wiring to make sure everything is in good condition. You might even have an electrician come and take a look to ensure everything is sound.

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Answer 1

The MaxxFan Plus Roof Vent w/ 12V Fan, Thermostat, and Remote - Powered Lift - 10 Speed - Smoke #MA00-04500K is the similar fan to the 4951ksc. The issue you are having with the fan and lid are likely the circuit board which can be replaced with…

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Answer 2

It sounds like your MaxxFan may need a new circuit board. Typically, when customers had similar issues they were able to replace the circuit board and their fan return back to normal operation. You can use Replacement Printed Circuit Board…

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Answer 3

Based on the issue you are having, Yes. A bad circuit board can cause all kinds of weird issues like your fan running all the time and the vent lid not opening. Since you have the MaxxAir 4751KS you will need the replacement circuit board…

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Answer 4

We do have a replacement circuit board 10-04751K with the part #MA10A04751KS which fits the 8951k.

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Answer 5

Thank you for including the model number of your fan, 04751KS, which was exactly what was needed to find your replacement circuit board. The correct part for your MaxxAir MaxxFan Plus Roof Vent 4751KS is: - Replacement Printed Circuit Board for…

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Answer 6

I won't be able to reference the numbers printed on the circuit board but all you need to do to determine the correct replacement circuit board for a MaxxAir MaxxFan Plus Roof Vent is look for the model number under the screen. If it is a 4751KS,…

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Answer 7

This definitely sounds like the circuit board, so you'll want to use the Replacement Printed Circuit Board #MA10A04751KS which is designed to work with models 4751KS, 4761KS, and 4951KS. I know some other customers have been apprehensive about…

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Answer 8

Thanks for reaching out! Since you have the 4951KS model MaxxFan roof vent you'll need the Replacement Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents #MA10A04751KS. The circuit board might look slightly different as far as the pieces…

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Answer 9

The correct circuit board for your MaxxAir MaxxFan 4951KS fan is the Replacement Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents #MA10A04751KS. It also works with The MaxxAir MaxxFan 4751KS and 4761KS models as well.

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Answer 10

If you have the MaxxFan part #MA00-04000K you need the replacement circuit board part #MA10A21276K as yours is damaged which is what's causing the strange behavior of yours.

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Answer 11

There isn't a slightly different version of an RJ-11 cable, the port will accept a standard RJ-11 cable in the Replacement Key Wall Control For MaxxFan Plus and Deluxe - 4 Key #MA00A03550K. What you can use is the Communication Cable #34279523. I…

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Answer 12

We do offer a roof rack for your 2009 Jeep Wrangler Sahara with a hard top. You should be aware that anything attached to the roof of your Jeep will create noise, The toughest part of any roof rack that is designed to fit your Jeep is that they will…

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MaxxFan Model 4751KS Will Not Shut Off

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