Question about True 49 cu. ft. / 1388 liter Commercial Freezer GDM-49F-RC

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TRUE freezer model number GDM-49F.

I got a freezer that was at 130 degrees upon arrival. I reseted the unit and it worked fine for a couple of days. Can it be the defrost switch on the evap. coil not letting it go into freeze mode?????

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Re: TRUE freezer model number GDM-49F.

Your unit should have a defrost timer.The timer may be stuck in a defrost.It should be located at the bottom of the unit next to the compressor.Open the door to the timer and observe the position of the timer.If you turn the knob and the unit starts up,it's the timer. If this is the case, you can purchase a new one at any local a/c supply.Let me know,Mike

Posted on Dec 14, 2007

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I have TRUE freezer model number GDM-49F. the compressor start but the evaporator fan wont start what culd be the problem

Could be a number of things. It has a thermistor that sits on the evaporator to keep the fan off until it gets cold. It also has a switch above the door that switches the fan on when the door's closed. It could be a loose connection in the wiring, or, lastly, it could be a seized fan

May 04, 2012 | True 49 cu. ft. / 1388 liter Commercial...

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Product in my true gdm-49f freezer is frosting up and there is an ice build up around the inside of the case. what could be the causes of this.

Try defrosting the unit by shutting it down until all ice is gone. If this corrects the problem and the ice returns you may either have a defrosting problem or a low freon charge.

Jan 20, 2011 | True 49 cu. ft. / 1388 liter Commercial...

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I have a true freezer m/# gdm-49f s/# 5140302 ... this unit is set at -17* it runs fine when it gets to the set point turn off of course by it doesn't come back on until it reaches 0* .... I like to...

well most t stats have a differential of 5 to 7 but almost never more than ten deg so that the compressor wont short cycle .something you can check .some t stats you can adjust the differential on check if yours has that adjustment screw on the side or back of T stat if you need more help or parts e mail me at

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How much open space should I provide around my True freezer?

This unit pulls air in through the lower louvers in the front and pushes the air out through the back . It produces a lot of heat when running. 3 or 4 inches at the back should be sufficient if the air can escape over the top of the freezer.

Sep 23, 2010 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

True 49f goes into defrost mode the contact opens for the compressor but the compressor keeps running

in many cases, these units have relays or contactors where the contact points actually weld together. this causes the unit to stay running even though power to the coil has been stopped. I'd start looking there first. don't over look the possibility that someone could have mistakenly miswired the unit.

Aug 19, 2010 | True 49 cu. ft. / 1388 liter Commercial...

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T-49F freezer cant get bellow 25

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Jan 18, 2010 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Coil freeze up

If the fan works , probably the unit is low on refrigerant, which means there is a leak that has to be fixed and then recharge the unit .Also could be the defrost system (heaters ,terminator or deefrost timer ).

Oct 02, 2009 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Temperature at 10 degrees

check condenser fans, if defective or running slow change it

if condenser fan is running, suspect a compressor with internal mechanichal problems, it will run but i can't guarantee how long, maybe a couple of weeks or days. if it's an copelamic compressor, it's going bad.

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