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Evap freezes up all fans are running ok - Freezers

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Good day,
Sounds as if the defrost system has failed. You didn't give the make and model number but here is an excellent tutorial on automatic defrost systems.

http://www.appliance411.com/faq/howdefrostworks.shtml

Posted on May 13, 2010

  • John Hall May 13, 2010

    Refrigerators and freezers use basically the same process.

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Frigidaire Freezer, model # FFU20FC6AW3. Unit is not cooling and the fan motor inside behind the access panel is not running. My Temperature Alarm sounds and will not shut off, unless I switch it to the...


if the evap fan is not turning try to turn it by hand a few times then start you freezer if it does not turn it needs to be replaced.make sure there is no ice build up on the evap coils.alos check the continuity of the defrost heater below the evap coils.once you het teh fan replace your unit should cool down to the proper temps.

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Have a gdn-49 true freezer freezing in evap to compressor what could be the problems


low refrigerant, leak, evap fan inop, thermostat inop.

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No evaperater fan run,compressor running,coil is frosting but no voltage to inside fan.


Look to the fan delay/defrost terminator that is located inside to the evap. It is usually attached to the evap coil. check there first.

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Evap freezes up all fans are running ok


Probably your defrost heater this is not coming on. or could be the board that runs the heater.

Mar 19, 2010 | Victory Freezers

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My upright freezer compressor is running but the circulating fan won't run.I already bypassed the thermostat but the fan still won't run.I also defrosted the freeze manually and still no go with the fan...


The problem is the evap. fan has gone bad. Part # WR60X10235, cost approx. $120.00 or the TJ90sm999 is one that will fit all of them which is only $25.00 and in my opinion a much better fan. Hope this helps. The sm999 has been around for years and is a universal fan which is easily adapted to fit all 115 volt evap fans like yours.

Jan 28, 2010 | GE 16.7 cu. ft. Upright Freezer FUF17DTR

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Walkin freezer has ice building up on the walls and ceiling. Defrost is working and since I replaced it the temperatue control works. Setpoint is 0 degrees f. I did notice that during defros the heaters...


If you are seeing droplets on the ceiling and runs down the back wall behind the evap I got a reason.
The unit is probably staying in defrost too long. The frost on the evap melts and some of it drips onto the heater elements. This turns it into steam which rises and hits the cold, metal ceiling. The steam condensates into droplets and whent the system comes back on, they freeze. This can also cause the runs down the back wall too. Seen this happen alot. Check to see that the fan delay is working, It causes the evap fans to come on only after the evap chills down to about 20 degrees after a defrost ends.
Hope this helps ya.

Oct 23, 2009 | Freezers

1 Answer

We have a true T49F freezer and the evaporator fans are not running. The compressor is running on startup. The coils are cold. But are freezing up. Shouldn't the fan be on, or does the cabinet have to...


Freezers have a sensor that is referred to as a "Fan Delay/Defrost Terminator". It senses the temp during the defrost cycle. Usually, when the evap temp reaches about 50 degrees, there should not be any frost or ice on it. This device terminates the defrost cycle. It also keeps the fans off so warm air is not circulated. When the evap gets to about 20 degress or so, the sensor switches on the evap fans. If the fans are not coming on, either the sensor is bad or the evap is not reaching the proper temp to cause the sensor to turn on the fans.

Hope is helps to clear up some things and point you in a direction as to what might be going on.

Jul 12, 2009 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Evap fans not turning on


If this is a commercial unit, you're too low on refrigerant (freon). Freezer should be about a minus 10 degrees for the evap and high side is ambient converted to a psi for the type of refrigerant that is in the system plus 25-30 psi.
The evap fans will not come on because the evap is not cold enough.
Hope this helps and good luck.

Apr 09, 2009 | Freezers

1 Answer

I have an older commercial upright Hobart freezer. The freezer seems to operate fine, cycling but always returning the compartment to zero degrees, until all of a sudden the temperature went up, well...


In most cases, an evap that freezes up is either an air flow problem or no defrost cycle. Older Hobarts have mechanical defrost time clocks. It could be locked up i.e., not running so no defrost cycle.
It could be coming out of defrost too early because the sensor that monitors the evap temp is not working properly.
The door could not be closing. If left cracked open, it will freeze up every time as unit never hits temp., keeps unit running. Warm air is seeping in and the moisture freezes on evap.
Lastly, the defrost heater(s) may not be working. Burned out, shorted, broken wire, etc.

Good luck and hope this helps.

Mar 28, 2009 | Victory Commercial Freezer VSF-3

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Unit not freezing , evaporator fan wont run


If this is a Bev-Air, don't think the door switch will control the fan. At the evap, there is a temp sensor called a fan delay. When unit goes into defrost mode, this warms up. Some also serve a dual purpose. It will terminate the defrost cycle at a certain temp., say 51 degrees or so, at the evap. Anyway, when unit comes out of defrost, it keeps the fan off so it allows the evap to cool quicker and to prevent circulating warm air. This could be your problem. Not a hard fix but they can be a pain sometimes. Outside chance that the unit is low on refrigerant (freon). This will not let the evap get cold enough to trip the sensor back into position to turn the fan on. Good Luck. Restaurant Parts and More carry alot of Bev-Air stuff. 1-888-814-1110. Ask for Rick

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