Many refrigerators have 2 fans.
One , outside and underneath, is to cool the motor and/or the compressor.
The other, inside, is to circulate the cooled air to all of the areas of the inside .
Either one can become dirty, and make noises, and the one inside could also become covered with ice or frost and make noise as the blades hit the housing,
The outside underneath one is easy to clean.
I know of no way to clean the inside one except to take the whole inside of the fridge apart.
God bless your efforts.
Go to the T-49 parts list and page 7 by scrolling down=> HERE
The evaporator is on top of your refrigerator as illustrated on page 7. You are simply going to have to defrost any ice blocking the defrost drain and by using a turkey baster force hot water with Clorox through the drain elbow from the back drain line to clear the blockage Appliance 911
First, I'm not a TRUE Refrigerator tech, but I have worked on similar retail display beverage/food chillers.
* There is dangerous electrical equipment and High pressure refrigerant present in this equip. Only qualified CFR tech should service this equipment.
*** There are following is for information only.***
* the fan(s) are usually connected in parallel so if one is out and the other is still working then it's probably the fan. If you can't get a new fan from your service vendor you can order it from you nearest Grainger or Amazon.com. It's a pretty standard fan. Check and note what kind of connector is used so to order the motor with the correct connector.
* There is an off chance that the fans are on a separate line off the main fan switch (Like a double pole switch) or relay. Check the relay for burns. Normally the fan wires are jumpered together as they both are turned on at the same time. The jumper lug may be rusted, disconnected, or broken. Unless someone has serviced the fan(s) earlier the wires should be okay and it's just the fan. (it's a moving part that goes on and off all day long.)
* Have the electrician check if there is still power going to bad fan connector (after disconnecting bad fan) There should be power at the connector with the other fan powered up.
* Check your warranty before attempting repairs as these units usually have long warranty periods. Call for service anyway as there may be other problems that caused the fan to fail.
Ice cream is usually kept at -10 degrees to stay firm. Need to check temperature. Look at condenser coil for cleaning. This is usually the most simple and common issue. If not making the desired temp, and the temperature control is set for that temp, and compressor run constant, it is a refrigeration issue. If compressor does not run constant, then a control issue.
Looking at your wiring diagram, the icemaker is wired through the light switch. So when you open the door it stops power to the icemaker and the noise stops,push the light switch and it starts back up again.
A lot of times the motor, or module will go bad in the icemaker causing somewhat of a grinding noise like it is trying to do something but cant. 99% of the time it is best to change the whole icemaker to avoid further issues but sometimes you can just change the module depending on the condition of the rest of the icemaker.
Serious answer, your coils are probably filthy. Get a vacuum and remove the service vent and clean out the compressors condenser coils. That is the usual cause of this. If you dont, itll overheat the compressor and you will have an expensive metal cabinet instead of a fridge.
It is sounding like you are low on freon will cause this issue hope that helps usually have to find a technician to put in freon unless its a R-134-A You can get a vehicle filler one and fill it yourself just make sure you do the Correct side for the fill up as they usually have 2 on thees a high and a low side.