Need a quiet replacement for Hood Microwave Fan

[Zboltman]

Hello, have a Frigidaire Microwave / hood fan over my stove and it sounds like a jet engine.
Want to replace it with a quiet one.
(5304467696 Motor, hood fan frigidaire)
I have looked and can not find technical support for this motor.
(Dimensions, cfm, wattage etc)
Can someone please help me to find specs for this. Or if you know of a super quiet replacement, that would be really awesome.
Thanks in advance
Scott

Moved from Ask a Technical Professional.
administrator allisolm

 

[BoomerD]

Your best bet would be to contact an appliance parts company.

 

[deadlyapp]

Quiet comes with speed. Reduce the speed, you get much reduced CFM. Unless you install a massively large fan at slow speed, you're going to significantly affect the flow.

Suggest you simply discuss with an appliance professional.

 

[Sukhoi]

Your noise is probably more from the ducting than the fan if your CFMs are reasonable

 

[NutBucket]

600cfm through an 8" duct is still noisy 😉

 

[mindless1]

The way it's integrated as a dual squirrel cage fan, you are pretty limited and at best, can likely only reduce the noise by reducing RPM and airflow, unless it's just noisy because the motor bearings are worn out.

Specs, I found a pic of it on ebay, states the following the best I can tell from the LQ pic (attached).

5304467696 FRIGIDAIRE MICROWAVE VENT MOTOR free shipping | eBay

Find many great new & used options and get the best deals for 5304467696 FRIGIDAIRE MICROWAVE VENT MOTOR free shipping at the best online prices at eBay! Free shipping for many products!

www.ebay.com

OH SUNG FMOTE A517WRKZ
OBB-2249X1, 120V 60Hz 6.8uF
145/134/108W 1.23/1.12/0.91A

Note it's a PSC type motor. There are ways to speed control a PSC motor, but modding a mains AC component is not something that's a good first electronics project if you weren't already included to do that.

Is it ducted out of the premises or just blows back into the room? If ducted out, another option is disable that fan and put a series fan further up the duct so less noise escapes into the kitchen (except as others mentioned, some of the noise is just turbulence and will remain, though taking the whole fan assembly out could help with that), though the noise that does escape may have a tinny rattly sound if it's metal ductwork, or you could isolate that noise with a couple rubber couplers.

Depends on how much space in the wall/floor/etc where the duct is routed, if any of that is reasonable to do.

 

[Meghan54]

The way it's integrated as a dual squirrel cage fan, you are pretty limited and at best, can likely only reduce the noise by reducing RPM and airflow, unless it's just noisy because the motor bearings are worn out.

Specs, I found a pic of it on ebay, states the following the best I can tell from the LQ pic (attached).

5304467696 FRIGIDAIRE MICROWAVE VENT MOTOR free shipping | eBay

Find many great new & used options and get the best deals for 5304467696 FRIGIDAIRE MICROWAVE VENT MOTOR free shipping at the best online prices at eBay! Free shipping for many products!

www.ebay.com

OH SUNG FMOTE A517WRKZ
OBB-2249X1, 120V 60Hz 6.8uF
145/134/108W 1.23/1.12/0.91A

Note it's a PSC type motor. There are ways to speed control a PSC motor, but modding a mains AC component is not something that's a good first electronics project if you weren't already included to do that.

Is it ducted out of the premises or just blows back into the room? If ducted out, another option is disable that fan and put a series fan further up the duct so less noise escapes into the kitchen (except as others mentioned, some of the noise is just turbulence and will remain, though taking the whole fan assembly out could help with that), though the noise that does escape may have a tinny rattly sound if it's metal ductwork, or you could isolate that noise with a couple rubber couplers.

Depends on how much space in the wall/floor/etc where the duct is routed, if any of that is reasonable to do.

View attachment 76028

Would you also move the damper to keep it above the motor?

 

[mindless1]

^ What is the damper's purpose? Backdraft blocking? That seems best kept after the fan, but I'd want to see it in person before I decided what options were available.

I don't think mine even has an inline damper, just a louvered one on the exterior wall where it exits, similar to this:

 

[BoomerD]

^ What is the damper's purpose? Backdraft blocking? That seems best kept after the fan, but I'd want to see it in person before I decided what options were available.

I don't think mine even has an inline damper, just a louvered one on the exterior wall where it exits, similar to this:

View attachment 76239

Could be. The last two I installed had a flapper on the back of the hood going into the wall duct. I don't remember if ther were removable or not...we left them in place.