Should Suction Line Be Cold?

The Copper Pipe (Suction Line) should be sweating and cold to the touch during a hot day. If it is not cold, your compressor could be off (bad capacitor/ hard start kit) or low on Refrigerant. ... Be Careful because this usually indicates a problem with the compressor or wiring.

Why is the suction line cold?

Over charged, or improper adjustment of the metering device causes the suction line to freeze up. Both are bad news for the compressor as well as inefficient cooling of the building. If you see frost on the suction line, the first thing to check is air flow.

What temperature should my suction line be?

The suction temperature should be above 35°F and below 65°F entering the compressor and the discharge line temperature should be below 220°F and above 150°F (typically) on a properly functioning package unit.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.