The freezer door wouldn't seal shut tight, then noticed a few hours later that things were melting/defrosting in there. Checked coils and they've been cleaned about 6 weeks ago, so not too dirty. Wonder what the problem could be? Compressor going out?
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Door Seal might be defective causing the door not to shut tightly this causes air from the room to get into the freezer through the opening and as the air comes in contact with the evaporator coils, it freezes. Normally the defrost system removes the ice but if the seal is defective the coils freeze too quickly and the defrost system cant keep up
If the freezer evaporator coils ice over, the defrost thermostat might be defective. Several times a day the defrost heater turns on for a few minutes to melt away any frost that may have accumulated on the freezer evaporator coils. In order for this to work, the defrost thermostat has to sense that the coils are cold enough. If the coils are cold enough the defrost heater will turn on. If the thermostat is defective it may not be able to sense the temperature of the coils and then won't turn on the defrost heater. If the defrost heater doesn't turn on, the evaporator coils ice over and eventually no air will be able to travel through the coils to provide cooling to the freezer. The defrost thermostat can be checked for continuity. It should have continuity when it reaches the low temperature of its operating range.
First thing I'd do is defrost it completely, that means turning it off for a few hours with door open & letting the ice melt, you could be getting a buildup of ice in your freezer jamming the fan before the automatic defrost has time to clear it. Also check that the seals are sealing completely, (that can allow frost to form in freezer), if not use a hair dryer to soften them (gently) & mould them back into line.
The door seals warm is from the mullion heater that minimizes moisture from forming in that area, under working conditions. You need to provide more information.... What did you see that made you defrost it 3 weeks ago..
its not doing a defrost by itself you need to replace the defrost heater/defrost termination sensor/thermostat/defrost timer could be any one of these parts causing this problem you need to test each part with a multi-meter to determine what needs replacing.
clean out all the vents,syringe the drain holes with clorine bleach,check the door seals for air tightness all round...after a full defrost(do not help it with a hairdryer as this only defrost the ice you can see....try to defrost it when you can leave it for 24/36 hours....with the doors open and switched off....then dry thoroughly.
The number one cause of freezers frosting up and especially that fast, would be that moisture is getting in. The cause of this is more than likely that your magnetic seal around the door is not making a tight seal. Check around the door and make sure it is sealed tight. Even the smallest of gaps will make a big difference. More than likely it is leaking on the side that has the most frost. Hope this helps.
this could either be a blocked drain from the freezer not allowing defrost water to escape or the defrost heater failing to turn on due to a faulty defrost heater or defrost timer not enabling the water to escape
Sounds like a defrost problem. Check to see if
there is any frost buildup in the back wall of the freezer. If so, it is not
defrosting as it should.
bad defrost timer
bad defrost heater (in freezer)
bad thermo switch in freezer
If you don’t know what these are then unplug the machine and let the ice
melt in the freezer overnight with the door open. Then try it the next day, if
is cooling fine then you need to have a service person replace one of the above
Could be alot of things. First thing: fully defrost the unit. It might be ice. One way is to shut it for about 2 days and let the rest of the ice melt. Clean the condenser coils. Check door gaskets. Restart the unit and check for refrigerant amount: Find the compressor from the back, clean off the largest pipe. Start unit ( must be off for at least half an hour). It will frost up. Does the frost stop after 5 minutes? If icy,dry or wet, you are okay.
Make sure your doors seal properly.
After that, might be the defrost timer or the control panel. Hard to tell.