Question about True GDM-45 Refrigerator

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Gdm 45 with new thermostat goes down to 28 degrees and compresor does not shut down

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Ive seen "new" tstats installed and the sensing bulb is still coiled up next to the control. Is it an OEM control.?

Posted on Jun 27, 2015

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If the new thermostat sensor is secure and where it belongs, it has the wrong charge in the system. That cooler takes a critical charge. The factory charge is in ounces if refrigerant. The system needs to be evacuated completely with a vacuum pump and recharged with an accurate scale that weighs in ounces. That will solve your problem. A refrigeration tech carries the necessary tools that an hvac tech doesn't. Hope this helps and good luck.

Posted on Oct 18, 2014


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Posted on Jan 02, 2017

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SOURCE: thermostat wont shut off unit

These units are bad about that. you have to mount the cap sensor in the small tube that runs thourgh the evaporator for proper operation. laying on top of the coil does not let the thermostat sense properly.

Posted on Mar 07, 2009

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SOURCE: Tru GDM-47 cooler evaporator icing up.

possible bad defrost timer,or control on an off is bad,were you adjust temperature...thermostat from 30 to 65.00 dollars....possible there is leak or unit is under or overcharged..more than likely under charged...possible defrost heater is not working...good luck..michael doctor airr if need additional help ..its free..

Posted on Mar 27, 2010

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SOURCE: My true cooler gdm-45 is

The thermostat seems to be bad. Or, the defrost timer is staying on too long.

Posted on Jul 12, 2010

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its one of three fults,,,
it could be the thermostat playing up,,,fit a new one
it could be it needs a re-gas,,so re-gas it
or the compresor could be playing up,,
if the compresor is at fult it needs a new compresor and a re-gas to fix the problem,,,
the compresor is a pricy part to replace,,
how old is it??? would it be cheaper to just buy a new unit insted of patching up the old one? as its only likely to brake down again at a later date!!!
so it could be cheaper to buy new in the long run

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