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Defrost cycles runs 30 min goes into defrost it a true gdm12f

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Defrost cycle usually comes on after about 7 hours. If it is happening every 30 minutes or so, the defrost timer is not working properly and your internal temperature will never have a chance to go down to zero as SOP.

When defrost cycle comes on, the compressor is automatically shut off and internal freezer temps can go up by close to 25 degrees or more. It is for this reason that commercial freezers do not have auto defrost - the latter extols a price, convenience at the price of higher average temps and less time to properly store foodstuffs in freezer.

Posted on Nov 23, 2013

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1 Answer

Kenmore upright freezer does not shut off until door is opened. freezer seems to work well.


Going by the service manual it seems that everything is fine. The fan is supposed to run while the door is shut and the compressor is supposed to run 12 hours and then a 30 min defrost cycle comes on then the cycle starts over again. I am posting the service manual, parts and wiring diagram for you to view if you so choose. https://files.acrobat.com/a/preview/8a6d6ca4-04b6-4cfa-b435-3980042b3ad3
https://files.acrobat.com/a/preview/6d7f8a46-0daf-4e01-aa54-01f306301f31
https://files.acrobat.com/a/preview/12246a57-0a63-4d66-b3f3-7f7b67536da6

May 31, 2016 | Kenmore Freezers

1 Answer

Fan does not come on nor does door light. Also will run to cold temp when it cycles off cabinet warms up very quickly


have you checked the door switch for each door? the lights should still work in defrost mode but not fans or compressor.

Jan 08, 2014 | True T23F Commercial Freezer

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How to set defrost timer for t19f


In general I use 4 defrosts in 24 hours for 30 - 40 min each.

Jun 06, 2013 | True T19F Commercial Freezer

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Where can I receive a parts list online for a True GDM-12F Freezer


1 800 325 6152 is the True factory tech assistance number. They will be glad to help.

Jun 03, 2012 | True GDM12F Freezer

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My true cooler freezer in side fans dont turn on i run it for 15 min. the make is gdm-72f


first place to look is in the evap where the defrost/ fan delay is located. It is usually attached to the "U" tube on the evap and senses the temp. It prevents circulating warm are after a defrost. It could be bad and keeping the fans from running. Start there and let me know if I can be of further help

Jan 27, 2011 | True 72 cu. ft. / 2039 liter Commercial...

1 Answer

True model gdim-26. runs fine unitl defrost then does not keep cold after defrost.


Hi, sounds like your defrost clock is stuck in the defrost mode. On most true boxes they have a paragon defrost clock with adjustable pins you can set the amount of cycles and duration of the defrost cycle. Find the clock and give it a turn in the direction of the arrow or cw. It will come out of defrost and start to freeze again. If it continues, you may need a new clock. Let me know what you find. Keep me posted. True boxes are top of the line
Sincerely,
Shastalaker7

Mar 23, 2010 | True 26 cu. ft. Commercial Freezer GDIM-26

1 Answer

Actually, its a True T-72 refrigerator. After running for a few weeks, the unit trips the breaker and continues to do it unless I leave it off for a few days and then re-plug it in, at which point it runs...


some manufacturers use a heater in a pan for the condensate water that is generated from the defrost cycle. It is usually located near the evap and compressor area. I've even seen them under the condenser coil. Look for a heated pan. You may have a bad heater. When it goes into defrost, water enters the pan and trips the breaker as the heater may be open and water enters it shorting it to ground. Waiting a few day allows the water to evaporate out. And the process starts all over again.

I would look for this first. If this does not pan out, let me know and we can dig alittle deeper. But try to have more details.

Dec 29, 2009 | True 72 cu. ft. / 2039 liter Commercial...

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...

5 Answers

I have a True Freezer Model T-49. It works fine but every 3 or 4


This sounds like a stuck relay to me. I have seen this problem before. The defrost clock kills power to the compressor relay coil during defrost. If the contacts in the relay are welded together the compressor runs while unit is trying to defrost. On newer units this relay is mounted in base of unit on the side or back of the electrical box near center bottom of unit. The compressor relay is a small rectangular box with 4 wires attached. It can be replaced with a single pole 20 amp contactor with a 120 volt coil/ or 240 volt. Check the units name plate voltage rating and ratings on old relay! ;)

Mar 14, 2009 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Kenmore


when its running how hot are the sides the starting amps are too high and 1.5 running amps ain't bad now the the cut in cut out are too high if you look on the dial that the mid point settings that's where you should have it not on 1 1 is hot set it on the straight line that's where you should do all your testing colder settings go up not down you could be overheating the compressor by making it come on too quick the freezer should be about -10 or so do you see any gaps in the gasket

Mar 31, 2008 | Kenmore 13.7 cu. ft. / 388 liter Upright...

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