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Ice in the suction line - Heating & Cooling

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Ice in a suction line is a sign of water vapor in the refrigerant
it will need a gas change , an accumulator drier change and the system to be vacuumed down for a couple of hours to allow the moisture to boil off
all it takes is an accredited ac specialist shop to do the job
if the ice is on the outside of the line ( which is what you probably meant) it is perfectly ok or can indicate a high gas level in the system
problems in performance will be noted if that is the case
again an ac specialist is required to fix the problem

Posted on Dec 20, 2016

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Ice on suction line


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God day,
Some thoughts.
1. Are the evap fan motors running, and at full speed. That would give you abnormally low suction pressure.
2. Cap tube sized too small. or partial restriction in the dryer cap tube/dryer when brazing in the lines.
3. Low ambient. What's the temp the machine is running in.
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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.

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