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What are the problemswhen the refrigerating machine frost on the suction line?

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Hi, It could be low on freon or the unit may not be defrosting properly...
Check out these tips...they can help you figure out what is going wrong withyour refrigerator and why it is not cooling

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Posted on Apr 03, 2011

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1 Answer

Installed new compressor


Your suction line has to have no frost at should be cool/warmer. You fridge is overcharged with refrigerant.

Feb 09, 2014 | Kenmore Freezers

1 Answer

Line set coming out of wall to condencer are frosted dont know if unit is r 22

Hello, if the suction line is frosted it is because of one of two reasons 1) low refrigerant charge 2) low airflow across the evaporator There should be a data plate on the outside condenser that will tell you what refrigerant is in the system.

Jun 11, 2011 | Heating & Cooling

1 Answer

What are the problems when the refrigerating machine frost on the suction line

Hello Stanly Steve,

Hello I understand that you are having a problem with you suction line on your fridge having frost on it. The general cause of this is that the evaporator fan is not working and allowing the coils to freeze up. The fan is located at the back of the freezer. Another cause of this is the condenser coils are dirty they are located at the bottom or rear of the fridge. The best way to clean the coils is with a long skinny brush and vacuum with a crevice tool. If you post the make and model I will see if I can assit you some more.

Thank you for choosing


Apr 03, 2011 | Refrigerators

1 Answer

Unit not cooling down,compressor running,condenser fan running. suction line just cool,condenser line barely warm.

Check if evaporator fan is running. Is there any frost buildup on freezers evaporator cover? If so you have a defrost problem (bad heater, defrost thermostat, thermister, defrost timer or circuit board ). If no frost and the freezer is warm then you most likely have a sealed system problem(leak, restriction, bad compressor) which is costly to repair.

Oct 19, 2010 | GE Â 17.9 Cu. Ft. Top-Freezer...

1 Answer

Great site! I have a 2000 GE refrigerator model CCC18HABDWW (made in Canada). The suction line that goes 1/2 way up the back ices up. Then when the fridge shuts off the ice drips all over the floor....

Good day,
The tech overcharged the machine with too much freon. Common problem.
Refrigerators are extremely sensitive to charging. The machine as it is running and the frost building up on that line, freon should be bleed off but only until the line goes clean. It's a slow tedious process since if too much is removed cooling will suffer.
Patience is the key here. I doubt dirt in the condenser is an issue at this time but cleaning it can never be done too often.

Aug 11, 2010 | Refrigerators

1 Answer

Refrigerator running but not cooling

Check list:
fan motors all functioning
Cooling coils free and clean
Compressor cool to the touch
(compressor blazing hot bad relay)
Backside of freezer section frosting up
(bad defrost heater,thermostat,or timer)
Small line from compress is HOT
(cool high pressure line means low charge)
Suction line frosting up (overcharged)
Generic ice box Training manual

May 17, 2010 | Kenmore Refrigerators

1 Answer

Why suction line would ice back

Good day,
Unusual question.
Lots of reasons. You didn't say if it was cooling or cycling off and on.
1. Evaporator fan motor in freezer compartment not running. Doesn't allow the refrigerant to boil off and returns as a liquid.
2. Evaporator coil badly frosted allowing no air flow thru it. Same as #1
3. Runs constantly (days). no demand on system, and once again will not boil off before leaving evaporator.
4. Overcharged. Floods back excess charge.
5. Heat exchanger came apart. The capillary tube is soldered to the suction line to transfer heat from the cap tube to the suction line. Necessary on a refrigerator. Common problem.

Hope this helps
Thanks for using fixYa

Jan 21, 2010 | KitchenAid Superba Architect KSCS25INSS...

2 Answers

Copper pipe in back of fridge frozen , fan is moving but feel no air blowing in fridge..or freezer...

That is called a " cap tube separation " . It can be caused by overlooking a defrost problem for too long . If the coils inside of the freezer frost up , that frost , will eventually work its way out thru the back toward the compressor . When it does this , the " low side ( suction ) " , receives liquid refrigerant , instead of gas . This liquid refrigerant , will destroy the compressor internal valves , causing it to loose the low side . ( Never charge a refrigerator low side with liquid , only gas . The high side can be charged with liquid . ) A cap tube separation , is when the pressurized ( causes heat ) cap tube , becomes separated from the low side ( suction ) tube , causing the suction tube to frost up , due to the cap tube no longer attached to it . When this happens for too long , the only repair , is to replace the compressor AND repair the separation , with wire ties , thermal putty sealant and aluminum tape .
I apologize for the technical explanation , but there is no other way to explain it .

Nov 21, 2009 | GE Refrigerators

1 Answer

I keep finding water coming from underneath the chest freezer.

How old is this chest type freezer. The newer freezers have foamed in place insulation which also prevents moisture from migrating into the insulation. Raising the freezer by putting rollers under it would allow more air circulation under the freezer to evaporate any condensation.

How often is this freezer defrosted? If frost buildup is heavy the gases returning to the compressor will be colder and may cause frost on the compressor suction line which will defrost between run cycles. The frost will melt off of the suction line during the off cycle and could be the cause of the water you are finding.

Off the wall, if you have a male dog he may be doing his thing causing what appears to be water from under the freezer. :)

Jul 29, 2008 | Refrigerators

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