View Full Version : Freon Noise in system
07-12-2008, 01:06 PM
I have a recently installed Trane XC95 and has been hooked up to my older Lennox A/C unit. They installed a Trane Coil at the furnace when they put in the furnace. My problem: I can hear a loud rush of freon whenever the comprssor starts the A/C cycle. It sound as if I have water hose running at full volume. I never had this sound before. They have checked and adjusted the charge on the freon. I beleive that there is air in the system. When they isntall the A-Coil they forced the freon into the compressor but I don't beleive that the evacuated the system. My concern beside the annoying noise is if air/moiture is in the system will that shorten the life of my compressor? I would like to have the system vacuumed or evacuated and recharged, is the a good solution? As a note there is a TXV on the system and system is cooling fine. Any help would be greatly appreciated.
07-12-2008, 01:25 PM
Doubt thats the problem.
The mismatch is more likely the cause.
The A/C coil is not part of the furnace. Its part of the cooling system, and should be matched to the OD unit.
Now its not.
07-12-2008, 06:14 PM
thanks for your reply. As as safeguard do you think it advisable to do the evac and recharge anyway? I kinda thought that the two different comp/A coil could be a contributer.
07-12-2008, 07:00 PM
I doubt it will help.
If they are willing to try ir, it won't hurt. But more likely then not, you'll still have the noise.
07-12-2008, 11:25 PM
Also check and make sure your smaller copper tubing is not resting against
the wall. That has been known to amplify the sound.
I wouldn't worry about it provided that the sound is consistent.
High pressure liquid refrigerant flows to the evaporator and boils off; some systems make more noise than others.
An intermittent sound would be a cause for concern though.
07-13-2008, 04:09 PM
A debt of gratitude to edward301. I found that tube in contact with a few joists and the center beam as well a gas pipe. I wrapped in foam tube pipe insulation and have ran 3-4 cycles and....silence. Just like the old days. Also a sincere thanks to all who responded. Saved enough for at least a tank of gas and a steak!
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