My fridge has become increasingly more noisy when the compressor kicks in. Any thoughts on why and how to fix this?

There are a few potential causes of a noisy bottom freezer. Here are some things you can try to fix the problem:

1. Check for frost buildup: Frost buildup can cause the freezer to become louder as it has to work harder to keep things frozen. To check for frost buildup, remove all items from the freezer and unplug the fridge. Then, use a hair dryer to melt any frost that has accumulated on the evaporator coils (usually located behind the back panel of the freezer).
2. Check for loose parts: Some common sources of noise in a freezer are loose screws, washers, or other small parts. Check for any loose items and tighten them as needed.
3. Check the evaporator fan: The evaporator fan is responsible for circulating air within the freezer. If the fan is not working properly, it can cause the freezer to become noisy. You can check the fan by removing the back panel of the freezer and listening for any unusual noises. If you suspect the fan is the problem, you may need to replace it.
4. Check the compressor: The compressor is responsible for circulating refrigerant and cooling the freezer. If the compressor is malfunctioning, it can cause the freezer to become noisy. You can check the compressor by listening for any unusual noises or by checking the compressor with a multimeter. If you suspect the compressor is the problem, you may need to replace it.

If you are unable to fix the problem yourself, you may want to consider contacting a repair service. They will be able to diagnose and fix the issue more accurately.

The initial cause is often a failure to properly level the cabinet and ensure it stands firmly on a level floor. Eventually an unlevelled compressor can become worn and prematurely noisy, wear the rubber mountings and cause pipework to become detached from clips and brackets so the usual shake or shudder as it stops becomes magnified and causes the pipework to rattle and/or the rubber mountings to be ineffective.

There are 2 possibilities I can think of for the hum. When you activate that door switch it activates 2 fans and the compressor. There is one fan located on the compressor and one located in the vent system in the fridge. The second fan is used to circulate cool air evenly through the fridge. I would recommend holding your finger on the door switch and listen carefully whether the noise is coming from inside the back of the fridge or from the lower bottom. Lower bottom could indicate compressor cooling fan or compressor. They would need to be inspected. If it sounds more like the other fan mentioned above it would again need to be inspected. The compressor cooling fans can get stuck or become noisy due to bearing failure. The vent fan can get stuck or noisy but also in some cases if the defrost circuit is not working can chock up with ice and create a buzzing noise as the fan blades strike the ice.

does it always make that hum noise or just when adjusting temp

hello,
Is the chirping sound coming from freezer fan,the fan by the compressor,or is it from the compressor itself.
If it is from one of the two fan motors and not the compressor the bearing on the fan motor is noisy and that fan motor needs to be replaced
if it's from the actual compressor the compressor would need to replaced and that would be very costly while either of the two fans isnt to expensive
reply with which fan is noisy and i will tell you how to replace that by yourself

Ah this is an indication that your condenser has become dirty, or blocked, or the fan motor is not working or the air flow is restricted.
The noise is generated when the compressor cycles off and sudders to a stop

The fault can be the vibration of the compressor motor radiating the noise to the condenser coils. So it may be hitting against the walls of the fridge and you are getting this noise. Also tthe compressor makes tteh vibration that transmits to plastics, trays at the bottom of fridge and the rear mounting. Use good adhesive stickers to soften them.

You may have a bad compressor.
You will need a Technician to replaced

either the compressor is under charged or it is near breakdown. compressor cost is almost the 1/3 of the freezer cost.

Your compressor start relay has become loose or possibly defective.
Push it back on for a good connection.
Watch it when you plug the fridge in.
If it sparks replace it.