Banging Noise - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 02-18-2012, 07:15 AM   #1
Newbie
 
Join Date: Feb 2012
Posts: 3
Rewards Points: 10
Default

banging noise


we had replaced our gas furnace about a year ago. It is a weil Mcclain brand. we had some banging noise before, however, after replacement the banging noise is worse. We hear it in different places every time when the heat goes on. We had professional looked at it and they kept tilting the heating units higher stating that it was the flow of water making the noise. Still not working-the banging noise is getting worse. HELP!

Advertisement

jacandy is offline   Reply With Quote
Old 02-18-2012, 08:06 AM   #2
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Rewards Points: 2,000
Default

banging noise


Hello and welcom jacandy, to the best darn DIY'r site on the web.

Is the system a steam or hot water system?

Mark

Advertisement

__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 02-18-2012, 08:40 AM   #3
Part of the Clover Leaf
 
Join Date: May 2011
Location: NW Burbs of Detroit Mi.
Posts: 1,107
Rewards Points: 500
Default

banging noise


sounds like water hammer to me.

you are getting hot fluid (steam or liquid water) that is contacting a cold spot in your pipe system.

There are guys here other than me and Jackofall1
who can answer your questions more knowledgeably. Please wait for their responses to your question.
hvac5646 is offline   Reply With Quote
Old 02-18-2012, 08:58 AM   #4
Newbie
 
Join Date: Feb 2012
Posts: 3
Rewards Points: 10
Default

banging noise


thanks for your reply! we have a hot water system. can the water hammer be fix or should i contact another pro?
jacandy is offline   Reply With Quote
Old 02-18-2012, 09:07 AM   #5
Part of the Clover Leaf
 
Join Date: May 2011
Location: NW Burbs of Detroit Mi.
Posts: 1,107
Rewards Points: 500
Default

banging noise


Quote:
Originally Posted by jacandy View Post
thanks for your reply! we have a hot water system. can the water hammer be fix or should i contact another pro?
I would wait and see what a boiler man has to say from this board..
hvac5646 is offline   Reply With Quote
Old 02-18-2012, 09:17 AM   #6
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Rewards Points: 2,000
Default

banging noise


Quote:
Originally Posted by jacandy View Post
thanks for your reply! we have a hot water system. can the water hammer be fix or should i contact another pro?
When does the banging sound occur?

When the pump starts or shuts down?

Is the banging sound continuous throughout the heating cycle?

What is the operating set point of the boiler?

How many zones in the system?

Mark
__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 02-18-2012, 09:30 AM   #7
Newbie
 
Join Date: Feb 2012
Posts: 3
Rewards Points: 10
Default

banging noise


the banging starts when the heat comes on, in the pipes then some hissing noise occurs. It is not continuous. Not sure what you mean by the operating set of the boiler. It was set by the boiler/plummer. He had stopped by several times to fix the problem which has not resolved. Want to get another opinion and have an idea how to fix it.
Thanks again
jacandy is offline   Reply With Quote
Old 02-18-2012, 09:51 AM   #8
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Rewards Points: 2,000
Default

banging noise


The operating set point of the boiler is the temperature the boiler is trying raise the water to.

Sounds to me that you have too much air in the system and it needs to be bled out.

Mark
__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 02-18-2012, 09:53 AM   #9
Part of the Clover Leaf
 
Join Date: May 2011
Location: NW Burbs of Detroit Mi.
Posts: 1,107
Rewards Points: 500
Default

banging noise


you could have airs trapped in the lines too...the hissing could be an eliminator expelling air or it could be a pressure relief opening.

Do you know what water temperature the boiler is set to maintain?

As far as fixing it I would need to know a bit more about the install.

The piping if not conducive to the new boiler could be causing part of the problem. Would have to see a pic of piping loop (lay out) before that determination is made.

Pics of the boiler would help a lot.

Can you tell me some of the things that your plumber told when he came back to look at the noise problem.
hvac5646 is offline   Reply With Quote
Old 02-18-2012, 09:57 AM   #10
Part of the Clover Leaf
 
Join Date: May 2011
Location: NW Burbs of Detroit Mi.
Posts: 1,107
Rewards Points: 500
Default

banging noise


Assuming air is the problem, the system is not bleeding it off as it accumulates.

There are devices that can be added to improve the elimination of air. Do you see on your invoice or were you told that the plumber was going to do this?
hvac5646 is offline   Reply With Quote
Old 02-18-2012, 01:25 PM   #11
how
Member
 
Join Date: Feb 2011
Location: Vancouver BC
Posts: 1,551
Rewards Points: 618
Default

banging noise


The most common boiler banging sounds that come from different locations are heating pipes that are binding and releasing as they expand.
Where those pipes were formally able to slide back and forth on their hangers during that lateral expansion, they are now sticking and then letting go with a banging sound..

Air in the pipes will only result in the sound of running water or if it get so bad that it restricts the water flow, a hammering sound from the boiler itself. The hissing sound can usually be traced to the air bleed valve outlets or the pressure relief valve. Tap the two halves of the expansion tank beside the boiler to make sure that the one half sounds empty and the other- full of water. If both halves sound the same, then the expansion tank is shot. If your expansion tank is in the ceiling then it may just need to be set up again.
Reading us the tridicator readings for psi and temp during the boiler run will tell us a more complete picture.

Last edited by how; 02-18-2012 at 04:53 PM.
how is online now   Reply With Quote
The Following 2 Users Say Thank You to how For This Useful Post:
ben's plumbing (02-18-2012), hvac5646 (02-18-2012)
Old 02-18-2012, 04:40 PM   #12
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Rewards Points: 2,000
Default

banging noise


Air trapped in a boiler will cause banging and or system pressure is too low allowing steam to form in the furthest radiators.

Bleed air from boiler and or increase system pressure to a range of 12-15 PSI.
__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 02-18-2012, 05:10 PM   #13
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,488
Rewards Points: 4,622
Default

banging noise


Please post pics of the boiler. And if you can look at the aquastat and post what temp it is set to, they will be helpful also.

Do you know if the new boiler is sized to the house heat loss, or the size of the radiators.

Advertisement

beenthere is online now   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
old wall furnace makes banging noise KarlJay HVAC 22 09-08-2011 02:55 AM
maytag washer makes banging noise atechdrew Appliances 1 04-25-2011 09:38 PM
Steam pipes generating banging noise Dezso3 Plumbing 7 02-20-2010 06:31 PM
Noisy furnace (with recording of noise) Jeffrey HVAC 3 01-23-2010 02:17 PM
Hear a Banging Noise from Bathroom Fan When its Windy wjk7320 Building & Construction 13 09-12-2007 11:13 PM




Top of Page | View New Posts