I've always had some issues with my right ear and also with a congested nose.
Recently, flying to a vacation with a stopover, I had really bad pain on both flights, including major sensations of movement within my ear (not a "pop", there was no relief). This started within about 20-30 minutes of takeoff, lasted about 15 minutes then slowly subsided. The ...
If you do not have much food, it is often possible to put the food on the window shelf from the outer side for the night. and switch the refrigerator off. For the day, when it may be much warmer and you may not like the food to be visible from outside, you can put it back into the fridge. It works better if you have as single plastic box for all food that ...
Look at the fridge yourself. Don't expect the maintenance men to always do their best and their best is usually medicore anyways.
Try to level it. If everything else fails, paper inserts under it can help.
Look at the compressor and tubing on the rear side. Some noise may be easilly tracked to particular parts bumping each other. These parts can be bent or ...
3M earplugs in 50/100 boxes for next to nothing and I wear them every day, it's just a habit. go to bed, forgot earplugs? run and get them, sleep perfectly. I wear them all day sometimes, out in the street, in the car, I don't notice I still have them... For sleep they are especially essential. If it's only a noisy fridge, sell it to someone who will put it ...
get a cooler big enough to hold what you need, put ice in it and use it.
Shut off the fridge and turn it back on when you leave.
Very simple and inexpensive.
I do not suggest ear plugs when staying in a rented place(hotel/motel/hostel/B&B) as you do not know the other tenants or employees and their ethics...and I want to be woken up if someone comes ...
In a pay/per/night kind of establishment like a hotel, go to the front desk and complain. They should be able to accommodate you (either by moving you to a new room or by swapping the fridge or by reimbursing you some amount).
In the future, be sure to specify that your room be not noisy — away from elevators and the like — when booking it. This ...
Check the laws of the country you're staying in. A particularly loud fridge that keeps you from sleeping might be a reason for reimbursement of parts of the payment or the contract in total. With that go to the desk and tell them the fridge is too loud they need to replace it otherwise you refuse payment.
By German law this would enable you to reimburse.
When faced with a noisy fridge in a hotel room, I unplug it when I go to bed. If unopened during the night, my experience is the fridge will stay sufficiently cool inside to preserve food overnight.
Take note of @PLL's comment below about food safety. In part:
...[O]ne should be careful with foods that spoil particularly quickly e.g. raw fish, or ...
There's no perfect solution, but some ideas:
Tweak the fridge thermostat to make it warmer. This will reduce the number of times the noisy fridge motor/compressor needs to run.
During the day, place perishable items in the freezer compartment to freeze them solid. At night, when you go to bed, disconnect the fridge power. You'll get a quiet night, and ...
Move the fridge
Move the bed/mattress
Wear earplugs (e.g., custom silicon earplugs)
Wear earmuffs or noise-cancelling earphones
If outside is cold enough, move food to balcony and shut down fridge
Add sound barrier screens (but that's hard to carry around unless traveling by car)
Add white noise