gas furnace goes boom

Reply

  #1  
Old 01-08-08, 11:20 AM
Member
Thread Starter
Join Date: Jan 2008
Posts: 1
Received 0 Votes on 0 Posts
gas furnace goes boom

not sure what kind of furnace we have as we just moved into this house. It is located under the house. We mainly use wood heat but there are times when we run out of wood and need to use the gas heater. It kicks in and then makes a loud boom which shakes the house. It only happens when it is first turned on and seems to happen more when it is really cold outside. Then the heater works fine. We used it for like 3 days straight and there were no booms. It oly happens when it hasn't been used in a while. It is a fairly new furnace (5 years old). What is causing this?? it makes me quite nervous.
 
Sponsored Links
  #2  
Old 01-08-08, 11:38 AM
Member
Join Date: Jan 2008
Posts: 4
Received 0 Votes on 0 Posts
Originally Posted by somalove View Post
not sure what kind of furnace we have as we just moved into this house. It is located under the house. We mainly use wood heat but there are times when we run out of wood and need to use the gas heater. It kicks in and then makes a loud boom which shakes the house. It only happens when it is first turned on and seems to happen more when it is really cold outside. Then the heater works fine. We used it for like 3 days straight and there were no booms. It oly happens when it hasn't been used in a while. It is a fairly new furnace (5 years old). What is causing this?? it makes me quite nervous.
Hi there. I don't know much about heaters. I'm actually waiting for some help with my own. However I have had a simliar problem with my own.

If you have a natural gas heater and it makes a loud boom before it turns on, it most likely is cause by delayed ignition of one or more of the burners. What happens is soot or grime, or whatever you want to call it, builds up between the pilot and the burners and blocks the pilot from contacting the burners properly. When this happens a very large amount of gas builds up and then ignites all at once causing a loud boom or explosion. If your heater has a flame pilot then you need to take a wire brush and clean around the pilot and the burners. If you have electronic ignition then your ingiter is probably not ingiting the 1st couple of times and needs to be replaced or cleaned.

I hope this was a little help. You might want to wait for a more experienced answer if you have never worked on a furnace. They can be dangerous.

-Wade
 
  #3  
Old 01-08-08, 01:03 PM
mattison's Avatar
Member
Join Date: Mar 2003
Location: Cinti, OH
Posts: 5,549
Received 0 Votes on 0 Posts
Wadester did a great job explaining delayed ignition and that sounds like what you may have. Most of the time it's from a small spider that gets into the crossover tubes and builds a nest.

My suggestion would be to get a pro out there to do a good cleaning and safety inspection on it.
 
Reply

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


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: