Ask Experts Questions for FREE Help !
Ask
    flyingP's Avatar
    flyingP Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jul 19, 2007, 07:29 AM
    Humming/Vibration in duct when running A/C for a period
    House is two years old. Once last summer, and now lately, when running the A/C a humming noise begins to come from what seems to be the ductwork on top of the furnace. The sound can be heard throughout the house, but the compressor outside seems fine.
    It takes several hours before the sound begins then becomes increasingly louder. If I turn the A/C off for several hours, it is quiet again, at least for a little while. There is also an air exchanger in this proximity. Any ideas?
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
    		  
    #2

    Jul 19, 2007, 07:56 AM
    May be a noise or vibration transmitted through the refrigerant piping, a/c may be building up a high head pressure have you washed the outside unit lately? Try it , can't hurt.
    flyingP's Avatar
    flyingP Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Jul 19, 2007, 09:10 AM
    Thanks. I'll try that first. Any other ideas?
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
    		  
    #4

    Jul 19, 2007, 09:22 AM
    Some times a transformer will set up a vibration or humming sound , the transformer is in the furnace.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Humming noise when water is running [ 2 Answers ]

I recently had a pressure reducing valve replaced. Since then I hear a humming or even a howling sound whenever I turn on any water source. Even when the toilet is filling, it hums or howls. As soon as I turn the water off, the sound stops. The sound is loud. I checked the pressure and it is...

Electric furnace humming even when not running [ 5 Answers ]

Hi everyone. I have a question about an electric heater I just got. It is a Dayton model TYV14, 240 volt, 38 amp, 9.2kwh. It seems to be working OK, thermostat is OK, but the question I have is should it make a humming sound, even when not in a heating/blowing cycle? There is a very quiet hum...

Focus Vibration [ 1 Answers ]

What can cause vibration when engine is running, without vehicle moving. Feels like it's caused by the engine, motor mounts, etc. No noise and doesn't get heavier once you drive. Thank You

Flexi Duct vrs Aluminum Duct [ 4 Answers ]

I am adding an addition onto my house. The local building inspector has already told me my HVAC unit is more than adequate in size to support the addition. The old duct vents are aluminum. Can or should I use flexi venting in the new part? What are the pros and cons of these two types of vent...

View more questions Search