The fan is working. The fridge, freezer & coils are not iced up. There is good room for air circulation. I vacuumed most of the dust from the coils, etc. The compressor is just slightly warm to the touch. The gauges are all the way up. The freezer is just cool enough to refrigerate, not to freeze. The fridge is blowing air but not nearly cool enough. What might be wrong?

Good day to you sir John,


A refrigerator or freezer that doesn't cool well enough may have a problem with its evaporator coils, condenser, or condenser fan motor. Frost build-up on evaporator coils, or condenser coils that are covered with dirt, dust, or lint can reduce how well a refrigerator can cool. If you notice ice getting thicker on the inside walls, inside bottom, or inside ceiling of the freezer, you have what is called a frost build-up. The problem is either with warm, moist air getting in through an old inefficient door gasket or the defrost system. Self-defrosting refrigerators have coils and a cooling fan that need to be cleaned regularly. If the coils get coated with any contaminants, they may not cool the refrigerator properly. The coils are usually thin and black and they go through fins that dissipate heat, just like a car's radiator. They are located behind the lower kick-panel or on the back of the refrigerator. To clean them, turn the power off and use this condenser coil cleaning brush, or this condenser coil cleaning brush, and your vacuum cleaner. Even if your coils are below the refrigerator, you won't be able to get to all the condenser coils from the front, so it's a good idea to pull the refrigerator out and clean the coils from the front and the rear of the refrigerator. Give the fan a dusting as well. Sometimes other things can be the reason behind poor cooling, like the condenser fan motor. Anytime the freezer fan is running, the condenser fan should also be running.
A frost build-up inside the refrigerator usually means that there is a problem in the self-defrost system. You may even have damaged door gaskets. When you open the refrigerator door, you also let in a blast of warm, often humid air. This moisture usually freezes onto the evaporator coils immediately. Self-defrost refrigerators are supposed to self-defrost between two and four times out of every 24 hour time-frame. They basically turn off for a few minutes several times a day. A defrost heater kicks on to melt any frost build-up on these coils, which allows the frost and ice to melt, then it drains off to the pan underneath most refrigerators. Unfortunately, when a defrost component fails, too much frost builds up on the evaporator coils. When this happens, the circulating fan can't draw air over these coils. With no air flow over the evaporator coils, the refrigerator compartment will lose its cool.
To determine if the self defrost system is faulty, it's best to remove all the food from the refrigerator and freezer, turn your thermostat to the Off setting, and just leave the doors open for 24 to 48 hours, and let the refrigerator defrost. Keep an eye out for an overflow of water from the drip pan on the bottom of the refrigerator.
After everything has completely melted away, set the thermostat back to a regular setting. If your refrigerator starts operating properly, the symptoms lead to there being a problem with one of three other components in the self-defrosting system, the defrost heater, the defrost timer, or the defrost thermostat.
If, after testing these components, the refrigerator still doesn't get your foods cool, there may be a problem with the refrigerant level and you will need to contact a professional appliance repair person.

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