AC Lines sound of running water to furnace,? Normal?

[sirius days]

Hey they're getting on here to see if anyone has some insight or let me know if this what I'm hearing is normal. I'll see if I can describe it... (I have central AC)

so my outside Unit I believe runs lines to my downstairs furnace. (Unfortunately I don't know what all those lines are called but they're wrapped in foam insulation). Anyhow, we've been doing work on our plumbing where we drained the hot water heater, turned on and off water etc. while I was in the furnace room yesterday and my main AC unit was running I could hear just a lot of what sounded like liquid coming through those lines (circled in yellow). I don't believe I've ever heard this before. It didn't seem to be the white PVC drain lines.(circled in red) It seem to be the lines up above that are covered in foam.

I did get the sound to stop if I turn the furnace switch off and it took about 5 minutes for it to stop. Anybody have some insight on what this could be or explain to me better the unit works and if I should be concerned or not, my local AC company charges too much to come out for a dumb question.
The lines dont appear to be frozen up or anything, I tried to replicate it this morning but not doing it. I will try later this afternoon when things heat up and a has been running a lot.

 

[Reach4]

I agree that the red-circled lines are the lines that drain condensation water dripping from the cold condensation coil for the AC. The insulated lines carry the refrigerant (Freon) between the condenser and the evaporator outside.

What I don't know is what an increase of noise from the Freon lines would indicate a loss of coolant. Has the cooling been effective?

 

[Sponsor]

 

[sirius days]

I agree that the red-circled lines are the lines that drain condensation water dripping from the cold condensation coil for the AC. The insulated lines carry the refrigerant (Freon) between the condenser and the evaporator outside.

What I don't know is what an increase of noise from the Freon lines would indicate a loss of coolant. Has the cooling been effective?

yes cooling is effective, this unit was installed in 2023.. so far I cant replicate the sound today. I will keep eye on it any maybe take a video if it happened again. so to be clear those freon lines shoud not sound like they are draining..

 

[Fitter30]

Sound is normal and will vary with outside temp. The hotter it is outside the higher the pressure runs. Large insulated line is suction returning refrigerate to the condenser small line liquid that in the evaporator coil changes state from high pressure to low pressure vapor picking up heat.

 

[John Gayewski]

Normal