There is no easy way to check the solid state starting relay without substituting a new one, so let’s check the thermostatic control switch instead. If your motor windings have tested out well, your problem is either a faulty motor starting relay or a faulty thermostatic control switch. If the meter’s L.C.D displays anything than an ‘O.L’ during these tests, the Compressor is faulty and needs replacement. If these readings are very different, the winding with the significantly lower reading has a ‘turn to turn’ short and the Compressor needs to be replaced.Ĭheck also for a ‘winding to frame’ short by taking a reading between each of the pins and the Compressor housing. Using your trusty multi meter, the reading you get between the Run and Common and the Start and Common pins should be within. You can get 2 types of shorts in a fridge Compressor – a ‘turn to turn’ short within a winding or a ‘winding to frame’ short. If the meter L.C.D displays ‘O.L’ when checking between any 2 of the pins, the Compressor is faulty and needs to be replaced. If the pins aren’t marked, set the multi meter’s function switch to the R x 1 scale, and find the 2 pins that give the highest reading – those will be your Run and Start winding pins. These are the Start, Common and Run winding pins. The 3 pins you’ll see are marked ‘S’ ‘C’ and ‘R’. Your fridge probably has a solid state start relay, which can be identified by the 2 wires connecting to it. Having electricity applied to the circuit under test will give you false readings and damage your multi meter, so unplug entirely.įind the Compressor’s Start Relay and pull it off the terminals on the side of the Compressor. You’re going to need a digital multi-meter for this – using the ohms function. Move the fridge away from the wall and unplug it from the wall socket. Remember to never work on an appliance that is still connected to a power source! Unplug the fridge entirely or make sure that it is switched off at your circuit board – leave a note on the board that it isn’t to be switched on again until you’re done working. Without lubrication you will have more wear and tear on the compressor, and the possibility of it overheating.Ĭheck If Your Fridge Compressor Is FaultyĪssuming you have some technical ‘know how’, here are some things that you can try. Just like the parts in your car need oil or lubricant to keep moving smoothly, lubrication is essential for a healthy compressor. You’re using a refrigerant that is not compatible with the Compressor/your appliance.Anything else isn’t meant to be there and is considered a contaminant. The only 2 substances in your fridge should be refrigerant and oil. The refrigerant moving through the Compressor is contaminated in some way.You’re keeping the fridge itself in a hot place, which is causing the Compressor to overheat – causing failure.Your Compressor is old and is experiencing normal wear and tear, which makes it stop working.In these conditions your Compressor will overheat and can fail. This causes the amount of refrigerant to increase at a much higher speed and so the Compressor needs to work both harder and for longer to achieve the same level of cooling. This causes the refrigerant to get super – heated and move away from the saturated point. You’ve overstocked/overloaded the fridge or are regularly storing hot liquids etc. Too much load in the refrigerating chamber.This means that the incoming refrigerant in the Compressor is in a vapor AND liquid form, the Compressor is not designed to handle that mixture, so it fails. This is caused by running the fridge while it stands empty for long periods, an accumulation of ice in the freezer chamber, or a failure of the control system as possible causes. There’s a very low load on the evaporator of the fridge.There are different causes of your Compressor failing, let’s list the most likely ones: 6 Why Is It Bad If My Compressor Stops Working? Finding Why Your Compressor Is Having Trouble
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