Question about True T-23DT Bottom Freezer Refrigerator

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Iceburg is forming under drain pan in freezer section.

I have replaced the drain tube heater and blown out the drain tube but water is freezing under the evaporator pan over a 3 month period. This is a True 23-DT with the bottom freezer.

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  • gmbench400 May 24, 2009

    On the outside bottom of the pan.

  • gmbench400 Jun 02, 2009

    Thank you for the great information.

  • Dennis Boxerman May 11, 2010

    Is water freezing in the pan between the evap bottom and the pan or on the outside, bottom of pan as if it is overflowing?

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  • True Master
  • 1,144 Answers

If it takes 3 months for this ice to form, it is most likely not a drain problem.
Let's look at a few things.
The evap could have 2 heaters that are used to clear the frost/ice. One imbedded in the coil and one in the drain pan. The one in the drain pan can be malfunctioning. (Burned out, burnt wire, etc.)
Another issue could be, when it comes out of defrost, the fan delay is not working so it starts as soon as defrost is terminated. This causes the water droplets on the evap to be blown out and onto the back wall or drip down and find it's way to the drain pan bottom.
Over stocking the unit can also cause this. Don't do anything that can restrict air flow around the evap.
Also, be sure the door closes and seals completely around all sides. Most all of these units have some way for the door to close on it's own. Test by opening the door about 45 degrees and then let go. It should close and seal.
Another thing to check is to see if there are the correct amount of defrost cycles. Should be 4 at 30 minutes each as a general rule of thumb. You may have not have enough or possibly the defrost cycles are being terminated too early by the termination control.
You can check to be sure that the end of the drain line is not being blocked by improper installation. You can have this issue and still be able to blow air through. Don't let that fool you. Be sure it lays sideways in the drain pan, if it has one. If not, it may drain freely into a floor drain. If so, check to see if air is being sucked into the drain line while the unit is running. It could **** moisture into the evap area and cause icing.

There a several things to look into. Hope this helps and good luck.
Let me know how you come out on this.

Posted on May 25, 2009

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