Tip & How-To about Refrigerators

Refrigerator Defrost issues - Check those door gaskets

While failed defrost controls is more normally the reason for poor refrigerator/freezer performance, we can not forget about the door gaskets as being a possible culprit.

First, visually inspect the gaskets for signs of severe deformation or torn areas which could prevent a good seal. If either is suspect, replace the gasket. Also make certain that magnetic gaskets in fact have the magnets.

Next, grab a dollar bill or sheet of printer paper torn to about the size of a dollar bill. Test the gasket on all doors all the way around by placing the bill or paper onto the frame with the door open. Then, close the door, and gently pull the bill or paper out from the closed door/gasket. You should feel some resistance to the pulling motion. Test all door gaskets, all the way around. Replace any gasket which allow the paper to easily pull out of the closed door, or, figure out if there is something preventing the gasket from sealing properly.

Door seal leakage allow not only warm air migration, but moisture migration into the refrigerator freezer section, putting undo load on the cooling and defrost sections to both cool the air and condense the moisture (which is seen as frost on the cooling coils.), and melt the created ice from the cooling coil..

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Top of the door of Defy freezer ( in & outside)has condensation on it when opening the door. We've just had new gaskets fitted so this shouldn't be a problem? Must we worry about it?

Hello Marion Rae,

Absolutely ... worry!

GASKETS are NOT A guaranteed availability item.

Condensation has no place in your FREEZER & the entire purpose of the "GASKET" is to PREVENT IT...!!

It will soon form as solid frost on the "EVAPORATOR"
and reduce its performance...

The NEXT defrost cycle should remove it..
but if the problem worsens you could over-fill
your defrost pan... and experience WATER PROBLEMS.

You SHOULD be able to FEEL full and firm gasket all around your FREEZER DOOR... NORMALLY I tell people to test for it by doing the "DOLLAR TEST"...

YOU don't need to test... you have CONDENSATION your
gasket is FAILING to accomplish it mission.

Worry is poor (not great) advise...
Have the work performed correctly...

BEST advice... ACT.

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Carnac the Magnificent

May 08, 2017 | Refrigerators

1 Answer

Major ice crystals in the freezer section

If the icing is on the back wall in the freezer, the main reason for ice to form will be, if the defrost system is not working. There are 3 main parts to the defrost system:

  1. Timer or Board
  2. Heating element
  3. Bi-metal (sensor)
If any of these parts fail, it won't defrost and icing will occur.

Another reason will be if the evaporator fan motor quits. It will have the same affect as a no defrost condition.

If the icing is everywhere, side walls also, this is usually caused by moisture. This is from air leaking into the cabinet. It could be from the door not closing good, gaps in the door gasket or it could be leaking around the cabinet flange. For gaps in the door seal you can use a hair dryer to straighten it, just be careful not to get the gasket too hot. If the cabinet flange is leaking, some RTV will seal it.

Feb 09, 2011 | Samsung RB2155 Bottom Freezer Refrigerator

1 Answer

Refrgerator is not cooling

Hi there
I have some stuff for you to read hope this helps you.
Cooling is poor For an overall understanding of how refrigerators should work, read about refrigerators in the How Things Work section of our website. A refrigerator or freezer that is cooling, but cooling poorly, may have a problem in one of several areas: Evaporator coils Condenser Poor cooling is often the result of a heavy frost build-up on the evaporator coils or a condenser that is clogged with dust, lint, and dirt. Evaporator coils Poor cooling is often the result of a heavy frost build-up on the evaporator coils. You can't see these coils without removing a panel on the inside of your freezer. A sure sign that there is a build-up is the presence of any frost or ice build-up on the inside walls, floor, or ceiling of the freezer. Such a frost build-up usually indicates a problem in the self-defrosting system or damaged door gaskets. The refrigerator is supposed to self-defrost approximately four times in every 24 hour period. If one of the components in the self-defrosting system fails, the refrigerator continues to try to cool. Eventually, though, so much frost builds up on the evaporator coils that the circulating fan can't draw air over the coils. There may still be a small amount of cooling because the coils are icy, but with no air flow over the coils, cooling in the refrigerator compartment is quite limited. Here's an inexpensive, though inconvenient, way to determine if the problem is with the self-defrosting system. Remove all of the perishable food from the refrigerator and freezer, turn the thermostat in the refrigerator to Off, and leave the doors open for 24 to 48 hours. (Be sure to have several towels ready in case the melting frost and ice causes the drip pan to overflow). This allows the refrigerator to defrost "manually." When the frost and ice build-up has completely melted away, turn the thermostat back to a normal setting. If the refrigerator then cools properly, it indicates a problem with one of three components in the self-defrosting system: The defrost timer The defrost thermostat (also called the bi-metal switch) The defrost heater If it still does not cool properly, there may be a problem with the refrigerant level or the compressor. You may need to consult with a qualified appliance repair technician to further diagnose the problem Thank you for writing to fix ya.
Best Regards Richard

Dec 27, 2009 | Refrigerators

1 Answer

have a LG 3 door bottom freezer with error code Er dH. Was told by tech support to unplug for 10 mins. If this fails unit needs service. Is this correct?

dh means defrost problem.replace defrost control and element,behind freezer panel.dont forget to unplug fridge before you work on it

Nov 17, 2009 | LG LRBC22544 Bottom Freezer Refrigerator

1 Answer

the refrigerator not as cold as before

Things to check - door gasket seals for leaks, dirty condensers that need to be cleaned and dust removed, proper clearance to the back and sides of your unit.

Is your evaporator fan in the freezer functioning normally ? is your freezer cooling normally ? You might want to check at the back of your freezer panel for overfrost on the evaporator that will impact cooling performance. You can shut down your unit and try manually defrosting and melting the ice and then run your unit for a couple of hours to see if cooling is back to normal........ if it is, then your defrost system is malfunctioning and you will need to have the control board and/or defrost system components checked.

Otherwise, if overfrost and door seals and dirty condensers are not an issue and you have also tried raising the cooling dial up and compressor run-time is excessive then you may have a sealed system issue but rare and not the common causes. Most common causes are overfrost on the evap / defrost timer problems and damper (flaps that do not open properly).

you will need to have those checked if all else fails.

Sep 23, 2009 | Imperial Refrigerators

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