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The refrigerant line in the wall of my guest bathroom running from the Lennox A/c condensor outside makes a loud buzzing noise when it is running. The supervisor of installation of the original installation company examined the unit thoroughly outside and up in the crawl space where the line runs and says the loud, irritating noise is normal. He claims that his unit makes the same noise in his house and that I am hearing the normal noise of the outside unit running inside the house. He explained the unit is highly efficient and pushes the refrigerant very hard through the line. I have asked the Sears installation department about this problem and they say there shouldn't be any loud noise for any reason. I have had 3 a/c repairmen from different companies, several handyman friends, and a professional house cleaning company listen to the noise and all say it is installed improperly and that the running of the condensor should barely be heard through the solid wall.The a/c system is a 3 ton, 12 seer, in a 1515 Sq. Ft. home. The handler blows so hard my eyes are red and irritated all the time and you have to turn the volume up on the TV in livingroom when a/c goes on. The grate over the intake is the size of a 36" television and faces the livingroom! What are the possibilities of problem with condensor line and do you think I can get it fixed without having to replace the entire condensor installation and unit?

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It may just be a loud condensor, otherwise, it could be a vibration from the unit housing and the noise carries. You could always replace the relay and see if it helps any. Also check unit pressure with pressure guage to make sure it is not over pumping pressure or not enough pressure.

Posted on Jul 21, 2009

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Our refrigerator is making a high pitched ringing/buzzing sound. Any way to fix this? Thanks!


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Hotpoint refrigerator model # CTF16GKC.. a loud annoying buzzing noise recently started coming from below the fridge. What is this and what can be done to ELIMINATE it?


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I am not exactly sure as to the type of unit you have. If it is a ductless split system (inside unit on the wall, never seen Lennox make one) you could be low on charge, the metering device to drop the refrigerant pressure is in the outdoor unit. If this is a whole house system, you may have a restriction in the outdoor section somewhere. If you look into the unit while it is running, try to find a filterdrier. It is a cylinder soldered into the small line. You can also see exactly where the ice starts, that is where your restriction is. Let me know what you find out.
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Noise can come from these areas:
The inside of the freezer Self-defrosting refrigerators use a circulating fan to move the air through the freezer and refrigerator compartments. This fan runs whenever the unit is cooling. The fan is located in the freezer, as follows:

  • If the freezer is on top, the fan is on the back wall, near the top or bottom, in the center of the freezer.


  • If the freezer is on the bottom, the fan is on the back wall, near the top of the freezer.


  • If the freezer is on the left, the fan is on the back wall, halfway up or near the top.


Over time, the fan may become noisy--usually making a chirping or squealing sound, though it may make a loud groaning noise instead.

To find out if the fan is causing the noise, just open the freezer door and push in any fan/light switches. If the noise is louder when the door is open, the evaporator fan motor is the cause. You can't lubricate or repair this motor. You must replace it.

The outside back of the refrigerator There are three components on the outside back of the refrigerator that may become noisy: the compressor, the condenser fan motor (if self-defrosting), or the defrost timer (if self-defrosting).

  • The compressor is a football-sized case with no apparent moving parts. You can see it on the outside of the refrigerator at the back near the bottom. It is usually black and has black or copper-colored tubes and various colored wires attached to it. If the compressor is the device making noise, there is probably no repair that will reduce the noise. You will have to replace it--which can be quite costly.


  • If the condenser fan is making noise, there may be a build-up of lint or other debris on the fan blade. The fan is located near the back of the machine, sometimes behind a thin panel. To clean it, first unplug the refrigerator, remove the thin panel, and use a soft bristle brush to clean it. If there is no lint build-up or debris on the blade, you will have to replace the motor.


  • The defrost timer is often located at the bottom of the refrigerator, near the front and behind the kick plate. Occasionally the electric motor inside the timer may become noisy. The timer must be replaced to solve this problem.


The bottom of the refrigerator Noises detected at the bottom of the refrigerator almost always originate from the back of the refrigerator. However, sometimes the drain pan under the refrigerator will rattle. You may need to tape the pan in place to stop a rattle. Also see the “Outside back of the refrigerator.”

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Hello aeruslady1,

Do you mean the compressor? I'm sure you do. The condenser is the hot refrigerant line that comes off of the compressor.
It just sounds like you have an old compressor. I have seen them make noises for years before they take a dump. If it continues to run loud even after it starts however, then you may need to clean the condenser coil or replace the condenser fan motor. Another thing that might make it run loud is some refrigerant lines may be rubbing against something. This can be remedied by bending the lines.

Hopefully this helps.

Sincerely,

shays5415

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