Jump to content


Use this Search Box to Find Appliance Repair Help Now
Need help finding your model number?
365-day return policy on all parts purchased here, even electrical parts that have been installed!


FAQs | Store | Memberships | Repair Videos | Academy | Newsletter | Beer Fund | Contact


Welcome to Appliantology.org, the Web's Premiere Appliance Repair Resource for DIYers!

The world-famous Samurai Appliance Repair Forums


You can post a question and get repair help for FREE! Click here to get started.


Already a member of the Appliantology Academy? Just sign in with your username and password in the upper right-hand corner of the screen.

 


Photo

York H 1 RA 018 S 06 - Loud knocking in wall when AC turns on


  • Please log in to reply
2 replies to this topic

#1 GoldenBear

GoldenBear

    Ikkō-ikki

  • Grasshoppah
  • PipPip
  • 22 posts

Posted 24 July 2011 - 01:58 PM

Over the past few weeks, there has been a very loud knocking in the wall when the AC turns on. The unit is outside. The knocking is near the ceiling on the second floor. It's less then 12 inches from the ceiling. It's a new sound and rather loud. The knocking goes away after maybe 30 seconds. It may happen during the day, have not noticed it. But I certainly notice it at night (it's in my bedroom). I can't make the connection between the AC and the knocking.

Note, the unit is approx 11 years old.

Thanks in advance for you help.

Use the Appliantology Parts Search Box to Find What You Need!
Enter your model number, part number, type of appliance, brand, or even a part description.
365-day return policy on all parts purchased here, even electrical parts that have been installed!

#2 ACtechGUY

ACtechGUY

    HAKUNA MATATA!!

  • Sublime Master of Appliantology
  • PipPipPip
  • 279 posts
  • Flavorite Brew:MMMM..ANY....BEEEER....

Posted 24 July 2011 - 06:03 PM

This is what is most likely happening.... The Liquid refrigerant line is expanding when the line gets warm.

Over the years that liquid line (3/8 diameter copper line) has expanded and contracted and flexed many times. That line is now touching a piece of wood in your home. As the pipe heats up it will expand(it is copper and will always expand when heated). As it expands it jerks forward making a sound that may sound like knocking. Once the pipe is done expanding (after 30 seconds or so) it will cease to make a noise. If you paid very close attention you may hear pops/ knocks or creaks after the system shuts down, due to the pipe returning to it's original size.

I can offer no other possible reason for your noise.........besides the noise and temperature change is upsetting the rat that is living in your wall right next to your bedroom.Posted Image

#3 GoldenBear

GoldenBear

    Ikkō-ikki

  • Grasshoppah
  • PipPip
  • 22 posts

Posted 25 July 2011 - 01:20 AM

thanks TechGuy. I think you nailed it. Very much appreciated.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users


FAQs | Store | Memberships | Repair Videos | Academy | Newsletter | Beer Fund | Contact


Use the Appliantology Parts Finder to Get What You Need!
Enter a model number, part number, type of appliance, brand, or even a part description.
365-day return policy on all parts purchased here, even electrical parts that have been installed!

Your Sometimes-Lucid Host:
Samurai Appliance Repair Man
"If I can't help you fix your appliance and make you 100% satisfied, I will come to your home and slice open my belly,
spilling my steaming entrails onto your floor."

The Appliance Guru | AppliancePartsResource.com | Samurai's Blog

Real Time Analytics