![]() ![]() The thermistor is a sensor which monitors the air temperature. If the refrigerator is not cold enough the thermistor might be defective. Test the start capacitor first with a capacitance meter, they don't fail often. If the start capacitor is burned out the compressor might not be able to start and run as often as it should. The start capacitor serves as a battery to give the compressor a little boost during start-up. If the refrigerator isn't cold enough the compressor might be having difficulty starting. ![]() If the cooling system fans and compressor are running, but the refrigerator or freezer is not cooling correctly check for an airflow or defrost system problem. The thermostat allows power to flow through to the compressor, evaporator fan and condenser fan. ![]() If the refrigerator does not get cold enough the temperature control thermostat might be defective. The start relay should be replaced if defective. If the start relay is defective the compressor may run intermittently or not at all and the refrigerator will not get cold enough. It provides power to the run winding along with the start winding for a split second at start-up to help get the compressor started. The start relay is a small device mounted to the side of the compressor. If the refrigerator is not cold enough, the start relay may be defective. Pull the refrigerator out from the wall and remove the access panel to access it. The condenser fan motor is located underneath the refrigerator near the back. The condenser fan motor draws air over the condenser coils to cool them. If the refrigerator is not cold enough there might be something caught in the condenser fan motor blade, or the condenser fan motor might be defective. If the fan is not working, no cold air will get to the refrigerator compartment. If there is only one evaporator it is in the freezer side. The evaporator fan motor circulates the cold air from the coils thru the compartment. The refrigerator may have one or more evaporator fan motor(s) depending on the model and evaporator locations. Every refrigerator has a set of coils called and evaporator. If the refrigerator is not cold enough, the evaporator fan motor might have failed. If the coils are dirty enough, the unit will never be cold enough and will not be able to cool the inside of the refrigerator to the proper temperature. As the coils get dirtier the refrigerator becomes less efficient, which makes it work harder to cool down. The condenser is like a radiator and must stay clean in order to dissipate the heat which was removed from the inside of the refrigerator. If the refrigerator is not cold enough the condenser coils may be dirty. Good luck to you! You are going to need it! The cost for me was $125.00 for the building inspector and I ended up using a saddle tap/Schrader valve and recharging my refrigerator with R134a with Stop Leak from my local auto parts store. Hire a State certified building inspector and tell them of your suspicions and have the document their finding and you can photo what they find. I know that places where there were building booms like SW Florida and Arizona experienced many Chinese Drywall issues. Aluminum doesn't show the damage as it does with copper. It eats copper and aluminum like I can't tell you. This problem occurred from builders using cheap materials from China starting roughly around 2005-2006 and beyond. You sound like your house has Chinese Drywall just as mine did. You might ask where the sulphur comes from. Likely your tubes are black from the sulphur. I can tell you what the repairman meant and no he wasn't trying to pull a fast one. ![]()
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