True GDM43F Commercial Freezer Logo
mike maccallum Posted on Jun 19, 2012
Answered by a Fixya Expert

Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

My true gdm-43f freezer keeps running won

Will not stop running even if i turn the dail all the way up

1 Answer

Jason Kennidy

Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

  • True Master 1,344 Answers
  • Posted on Jun 20, 2012
Jason Kennidy
True Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Joined: Oct 28, 2010
Answers
1344
Questions
0
Helped
370225
Points
4021

Not sure exactly what the situation is I'm going to give you a detailed overview on how the system works that way you'll be able to isolate the problem. Your machine is a single compressor unit, meaning that even though there are two seperate sides, the freezer and the refridgerator, they do not operate independantly. The sealed system, which is what cools the machine, has two parts, a high side and a low side. The high side is located under the machine and consist of a condensor, for which freon is pressurized back into a liquid and passed throug the compresoor to be released as a gas into the evaperator, the low side. This is where the freon is at a cold state. Ok, now that you have the bare basics of a sealed system, we move forward. The Evaporator is located in the freezer side, behind the freezer wall. As freon goes through the evaporator, a fan, called the evaporator fan, is located above it and circulates air throughout the freezer compartment. Also, an airway connects the freezer to the refridgerator, usually top right of freezer, or top left refridgerator on side by sides and through the freezer floor on top mount models. This means the freezer cools the refridgerator side. ****First check point**** Is the fan running in the freezer? This would cause the freezer not to cool as well but also a rise in the refrigeration side would be noticed. As freon goes throught the evaporator, which is made of aluminum, the temperature levels are well below the freezing point, so frost and ice will form on the coils. Over time, this kind of build up would form a blockage, not letting air be drawn from the bottom of the coils by the fan to circulate the cold air. To prevent this from happening the a defrost heater is installed to thaw the ice away and comes on every 6-8 hours. This is initiated by the defrost timer, or in some machines an adaptive defrost control. The heater will be located at the bottom of the evaporator because hot air rises, getting maximum effect. A third part to the defrost system, the first two being the timer and heater, is a bi-metal,or terminating thermost. Its called this because when the thermostat is cold, the metal inside it constricts making a pathway for electricity to flow through to the defrost heaters so it can get hot, and as the heat rises and the ice melts away, the terminating thermostat will warm up, and the metal will expand causing the path of electricity to be broken, turing the heaters off. This is to prevent any high temperature situation from happening, like melting plastic or even a fire. If any of these parts fail, the machine will nit defrost. ***Checkpoint two***** Do you see any ice build up on the freezer wall. This ice will be completely across the back wall. Most signs of defrost problems are noticed first by a rise in temperature on the refrigerator side first. The above can be assessed with a quick look and listen. If no frost is present and the fan is running you can rule out the above. ****Please not that ice build up on just a small section, for example, upper left or right corner only is not a defrost situation but a sealed system issue, caused from low freon or a restriction in the lines and a EPA certified technician should be called.****** The last thing you should check you'll need to pull the machine away from the wall and remove the lower panel to gain access to the compressor area. What you are checking here is to see if the condensor fan motor is running and that the coils are somewhat clean enough for air to flow across them. The fan draws air from across the compressor and through the coils helping to keep the compressor temperature down and also to evaporate the water that is drain when the machine goes into defrost. Rule of thumb is if the compressor is on the fan should be. If the fan isn't runnning the heat from the compressor will be transferred to the machine and notice first on the freezer more so than the refrigerator. ****checkpoint three**** IS the condensor fan running? Are the coils clean, and can you feel the air from the fan with your hand placed on the opposite side of the coils?
The refrigerator side is usually where your defrost timer, discussed earlier is located. Also on this side is where your temperature control, or controls , are located, These controls are what are called thermostats, and have a direct line to the compressor. This means when the temperature has reached the desired setting the thermostat will kill power to the compressor in the same manner the terminating thermostat does with the defrost heater. Some models have a temperature control thermostat for the freezer and the refrigeratot, but some only for the refrigerator. The most noticeable sign of a thermostat being bad is the food in the refrigerator side will freeze, usually on any setting or the machine won't come on at all, including the fans. Problems are usually noticed on the refrigeratot side first. The last thing to discuss is The freezer and the refrigerator both are rising in temperature, but the fans are running, etc. Normally in cases like this a humming sound followed by click is heard or sometimes just the click. The humming sound is the compressor trying to start but failing and the click is the relay breaking contact. On newer machines, especially ones that fall under the whirlpool umbrella, the compressor relay, also called the start device has failed and needs to be replaced, but also the compressor itself could be bad. Well, thats the basics. I know it's long winded but I wanted to put something that you could print out and use as reference. Good luck.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

4 Related Answers

Anonymous

  • 141 Answers
  • Posted on Oct 01, 2010

SOURCE: I have a true freezer

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 [email protected]

Ad

Anonymous

  • 110 Answers
  • Posted on Jan 20, 2011

SOURCE: product in my true gdm-49f

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.

Dennis Boxerman

  • 1306 Answers
  • Posted on Feb 28, 2011

SOURCE: my true cooler freezer

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

Russ South

  • 91 Answers
  • Posted on Jun 12, 2011

SOURCE: True GDM-72f freezer Fans don't start

Thermo fuse has failed on the core plate, tells the freezer its cold enough to start blowing air, you can bypass it but not recommended. hope that helps, Russ

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer
0helpful
1answer
0helpful
1answer
0helpful
1answer

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
0helpful
1answer

True gdm 72 goes below 20 degrees

Usually a blocked condenser fooling the thermostat into running overtime. Possibly thermostat fault but less likely
0helpful
1answer

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
0helpful
1answer

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.
1helpful
1answer

True upright freezer. coil fan not running.

Let it run. Coil temperature has to be low enough for the fan delay switch to close.
Not finding what you are looking for?

276 views

Ask a Question

Usually answered in minutes!

Top True Freezers Experts

Jay Finke
Jay Finke

Level 3 Expert

1397 Answers

ADMIN Andrew
ADMIN Andrew

Level 3 Expert

66957 Answers

Are you a True Freezer Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...