Spewing sound in Freon line

dwilder · #1 Mar 16, 2006, 07:50 PM

The Freon line to the central heat and air unit for the second floor unit run across the ceiling of my bedroom. Recently just before the air handler starts I hear a spewing, or gurgling [ like rushing water] sound. The unit appears to heat/cool ok. Is this something I should be concerned about?
The outside unit is at the basement wall, about 30 feet vertical and 50 feet horizontal from the 2nd floor air handling unit.

labman · Mar 18, 2006, 07:32 AM

AMHD has some very good people, plumbing, electrical, computers, etc. When it comes to dogs, I am one of them. When it comes to HVAC, a few other and I are doing what we can, but this is one I don't know. It sounds like something is wrong. Even if the system continues to run, it may not be as efficient as it should be. I can't say if you have a problem with the expansion valve. I can say, if it has a problem, you will have to have a technician fix it. All this leading up to a lame, call a professional. Sorry.

ridgid002 · Mar 19, 2006, 11:11 PM

by the sounds of it u have a hydro air system in your home this being the case and not knowing your location ill assume you are in heating mode the rushing/gurgling sound u are hearing prior to your unit starting up is air in your water lines going to your coil without going into great detail because i may be wrong about the hydro system but if i am correct this problem can be easily corrected by bleeding the heat loops ...if i am correct about this being a hydro air system please let me know and ill provide further instructions on how to bleed it if necessary if it is not a hydro system let me know and ill provide the a/c explanation for the noise you are hearing.....please let me know either way ...thanx

dwilder · Mar 22, 2006, 06:26 PM

Sorry for not being more detailed. The system is not hydro air. it is conventional Freon heat/cooling system [heat Pump?] . I live in central Alabama and the sound began during this heating season. I have not used the cooling side this season as of yet. Not sure if it makes the same sound or not. A friend seemd to think that the vertical Freon lift of roughly 30 ft from the condenser could be the problem. The unit is only three years old. I appreciate any advice you might have.



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