Have a low howl in are refrigator some times what could be the cause it is a side by side g e

Sounds like the evaporator fan (behind rear panel in freezer.

Refrigerators used to use a low wattage electric heater to warm this area in order to prevent condensation from forming there. Now, in an energy concious world, they use a loop from the condensor so "waste" heat can be used for this purpose. If the refrig has been running a long time, this area can become rather hot.

Ok nx , I will try to help you .
1 ) unplug the refrig , and on the back , remove the panel covering the
board.
2 ) unplug the blue conector on the board , with 3 larger wires connected to it . looking at the connector , you will see
wire1 , wire2 , space , wire3 .
3 ) find a short piece of insulated wire , and strip both ends about 1/2 inch , and insert one end into wire2 , and the other into wire3 . Leave the connector unplugged .
4 ) plug in the refrig . After about 1 min , look inside the freezer , at the bottom , looking for a red glow . If no red glow , then the problem is the heater or defrost thermostat ( the 1" cylinder , with a pink and blue wire going to it , clipped to the top right on the coils ) . If you replace the heater , replace the defrost thermostat also .
5 ) if you do get a red glow , then the # 4 thermistor is probably bad . This is the 1" white torpedo looking piece , with 2 wires going to it , clipped on the top left of the coils . This thermistor works off resistance by coldness , and sends the signal to the control board . When the control board registers this resistance for so long , it will go into the defrost cycle , causing the heater to come on .

The fan howling , could be from trying to pull air up thru the frosted coils. The # 5 thermistor , located at the bottom of the freezer , slightly foreward of the drain , inserted into a holder , with 2 white wires going to it , tells the control board what the freezer temp is . This thermistor , could be bad , varying the resistance message to the control board , causing the fan speed fluctuations .

Could be the start relay device on the compressor. Does it try to start every minute or so?

sounds like the fan bearings are wearing out. this causes imbalance and makes a vibrating howling noise.

Could just be an idler pulley on a belt or bad bearing in the altenator

Bad computer board in back of fridge, unable to control motor speed causing motor to hunt

the problem you are having is in the main control board. ge has had a problem with this part causing the fan motor to go into high and low speed which causes the howling noise. unfortunately it is a costly fix, around $125 for the part. if you are savy to changing this part it is a matter of unplgging about 5 connections and replugging them. the new board has an extra set of pin that nothing connects to. READ the instuctions and it is a simple fix, saving about $50-60 in labor costs.

Hi there!

Check at the back for any objects or packets that are in contact with a fan. This often causes unusual noises.

See if you can identify the source of the noise, ao I can help further.

Thanks.

Check to see if refrigerator door is lower than freezer door. If so remove toe panel, (bottom front). Under refrigerator door hinge at bottom right is adjuster for door. Adjust upward so door is even. On some models when door is too low it causes light to stay on some times, raising ref. temps.