Compressor of fan suspension ""rubbers gone hard"", sometimes a pipe rubbing or touching. Sometimes the fan blades clip the housing.
SOURCE: refridgerator making a rattling noise
We had the same issue and the noise would stop as soon as the freezer drawer would open. There was an ice cube stuck in the maker. As a result the fingers that kicked out the cubes could not turn thereby binding the motor. After the cube was removed, the noise ceased.
SOURCE: Side by side (KSRB25FHSS05) loosing cool in freezer
jame open the back cover of the evaporator are in the frezeer section you will a type of radioator thats is your evaporator now check for frost if just frosted is ok if all iced up and a lot of ice then yoy have a defrost problem if no frost and compressor is running and you are sure of that then check the name plate for the date the unit was manufacture is less tha 5 years call a tech ou to check for freon or restriction ;leaks if less than 5 years is free but you have to be sure is running becuase the seal system in the only one under warranty ok
SOURCE: KitchenAid ksrb25fkss01- fan runs, warm air circulates
Compressor change is probably more than you wish to tackle.
1) must be certified to work with refrigerant.
2) requires silver soldering and or silver brazing.
3) requires re-charging with refrigerant and this is critical and must be measured to the oz.
If it works fine when it re-starts we need to find out what is stopping the compressor. First guess is a defrost timer. The unit goes into defrost at pre-determined intervals, depending on the defrost timer. When it goes into defrost, compressor goes off, heaters come on, and a defrost cycle is initiated. Following this, the heaters go off, (usually by a t-stat and not time), and the compressor is allowed to run again. Changing the defrost timer, which is probably one of the least expensive components, is worth a try. No guarantee, but it is a better choice than the compressor. If the tech did any tests, did he say why the compressor was questionable? Since this happens once or twice a week, it sounds like the timer or at least it is coinciding with a typical defrost cycle. Here is a possible test, when you find it blowing warm air in the freezer, advance the timer 1/4 turn cw. See if the compressor comes on when you do this. That is probably more info that you were looking for, but this is worth a try.
How old is the unit?
Gary
SOURCE: Fridge not cooling...freezer works fine.?
Have you checked the damper at the top left hand side, could be frozen - take it off thaw it out and replace. The freezing could have damaged the unit though.
SOURCE: Noisy [like loud motor running] almost all the time--for about a week
zanussi fridge freezer zk57/38r
motor running a lot water collecting at drainage by back pannel
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