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Topic: Furnace "explodes"
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ranger fan

2/4/2012 8:48:43 PM
Member since:
Nov 2009
Total posts:85
Furnace "explodes"

We have a Whisper Heat furnace by Lennox. We just bought our house this summer and since we've started using the furnace, we have heard the furnace "explode" or "pop" so to speak. Just as the furnace is starting up it will "explode" and shake the entire house which is a 4 level split. It doesn't explode loud enough to shake the house every time but pretty close. It also doesn't do it everyday either. If you go into the furnace room afterwards you can smell gas. We have had a technician come and look at the furnace and he can't figure out what is wrong. He says he's never heard of these furnaces doing this. He says that there is nothing wrong with the furnace and it looks like it is about 15 years old. Today, for instance, it has "exploded" 4 times, scaring the crap out of us. It doesn't matter what the temperature outside is, it doesn't seem to make a difference whether it happens or not. I am frustrated at not knowing what is wrong with it and am afraid that something bad is going to happen one day. Has anyone heard of this problem before? What can we do, short of replacing the furnace? Some people say it's in our ducts others have said to replace the gas valve. I don't want to throw money away trying to fix it only for the problem not to go away. Help!!!!

 
 
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Michele_Cody

2/4/2012 9:01:26 PM
Member since:
Jul 2011
Total posts:232
Call

BNR Mechanical Richard will fix you up properly he knows everything there is to know about heating systems I bet it will only take a quick look and he will have it running properly.  
204-720-8333

Crash

2/4/2012 9:07:10 PM
Member since:
Apr 2006
Total posts:2195
hmm

Big Mamma

2/4/2012 9:10:36 PM
Member since:
Oct 2009
Total posts:1525
...

I would be scared shitless my whole house would go up with my family in it.I would replace the furnace.

joeseph

2/4/2012 9:17:29 PM
Member since:
Aug 2010
Total posts:137
....

replace it with a new high efficiency furnace. There is a MB hydro rebate for high efficiency gas forced air furnaces.

RonHart

2/4/2012 9:28:20 PM
Member since:
Nov 2011
Total posts:510
Should have

called manitoba hydro and they will come over and find the trouble.I'd be a little scared of carbon monoxide killing you if it doesn't just blow the house to hell first.

RonHart

2/4/2012 9:30:48 PM
Member since:
Nov 2011
Total posts:510
I'd

call hydro tonight and have them come over and find the problem rather then wait.

Wiseguy850

2/4/2012 9:32:01 PM
Member since:
Sep 2009
Total posts:405
---

Get a second opinion or a Lennox technician to look at it (if you haven't already) but if it can't be rectified and smells like gas, it would be out of my house, and I mean yesterday.

Luckey Luc

2/4/2012 9:35:26 PM
Member since:
Jun 2007
Total posts:212
You say that

you smell gas sometimes in the furnace room ???? helllooooo what are waiting for ???? This a very dangerous . Your furnace is trying to tell you something  
its getting to much gas at ignition time thats very serious.

chillywilly

2/4/2012 9:42:31 PM
Member since:
Sep 2007
Total posts:106
Had one also

Does it have a standing pilot or elect ignition? We had one that did the same, and what i did was clean the igniter with fine steel wool, and close the gap between the rod and the gas orfice a tiny bit and it worked fine after that.I cleaned it every fall, and usually once through the winter. If you are downstairs when it tries to light you might hear a tick tick tick, which is the igniter.A few seconds is normal. When dirty or gapped to big it is harder for the spark to jump the gap, and there fore lets a large gas pocket to build up and when it does finally light, that is where you get your mini explosion. Had a heating buddy of mine look at ours and he also said it was an issue with the module from the factory, it would not lockout after so many tries, it would just keep trying to light. Might not be it on yours, but it fixed mine.

ranger fan

2/4/2012 10:05:19 PM
Member since:
Nov 2009
Total posts:85
sounds the same

When I started listening to that video and it started with the tick tick, I jumped...it sounded exactly that way and then the woush afterwards. That's exactly what it does but alot louder. The second video, really scared me. Any thoughts on how to fix???

StoryTeller

2/4/2012 10:06:49 PM
Member since:
Feb 2010
Total posts:567
Time for a 2nd Opinion

Hire a certified HVAC technician to check the problem. More often than not, unqualified people just make the problem worse, costing the customer more money and headache.

ranger fan

2/4/2012 10:12:25 PM
Member since:
Nov 2009
Total posts:85
He is to my knowledge

  
StoryTeller said "Hire a certified HVAC technician to check the problem. More often than not, unqualified people just make the problem worse, costing the customer more money and headache. "

As far as I know the guy that came to the house is certified. I think I will get a second quote and I have definately thought about calling central gas. I don't think I'll wait any longer. Thanks for everyone's opinion and yes I am definately scared.

2910

2/4/2012 10:21:24 PM
Member since:
Mar 2010
Total posts:10
Call Hydro

Just a heads up to people out there having there furnaces serviced by Plumbers they are not fully trained service personel and have learned by trial and error.(parts changer) There could be several things wrong with the furnace or nothing at all. It could be something as simple as the chimney not venting properly because of a newly installed range hood or exhaust fan. Does the furnace room have a fresh air from outside and its blocked off?

Doug

2/4/2012 10:32:04 PM
Member since:
Mar 2005
Total posts:6277
noise

The noise in the first video is quieter than the one in our house now less the click.  
 
I hear it turn on- then sounds of it being fed gas and then a loud woosh. The burners kick in. The last place We had did the same but it was a big bugger of a place. Our small place now makes all noises louder.  
 
Call in a new guy and get him to check it out again. Maybe ask him to let you watch the turning on process with the hatch removed re burners etc. It is a process from stop to go and it creates some noise.  
 
It not complicated but for peace of mine get it checked again!!  

Immolynod

2/4/2012 10:32:34 PM
Member since:
Mar 2011
Total posts:927
Furnace

Furnaces scare the hell out of me. I had a furnace fire last year...thank god I happened to be home from work 3 hours early that day. It happened about 15 minutes after I got home. I was on the phone, smelled smoke all of a sudden, and then there was a bang and smoke started to billow out of all the registers. I freaked and got all my animals outside, then ran back inside to turn off the power. Fortunately, the fire put itself out and only the furnace had to be replaced, but my house was filled with thick smoke for hours, and it was +40 outside. Me and my pets roasted in the heat until it was safe to go back inside.  
 
They never did figure out what caused the fire...some freak electrical mishap.  
 
So, if I knew there was something wrong with my furnace, I would be on it ASAP and wouldn't stop until it was fixed or replaced.  
 
Edited by Rdrchick, 2012-02-04 22:33:45

Big Mamma

2/4/2012 11:17:23 PM
Member since:
Oct 2009
Total posts:1525
call them...

keystone

2/5/2012 1:27:08 AM
Member since:
May 2011
Total posts:138
Delayed Ignition

Could be fixed with a good cleaning. Or the spark is jumping in the incorrect spot.  
 
Get a different heating pro over.

0133

2/5/2012 3:34:30 AM
Member since:
May 2009
Total posts:25
Nice

  
2910 said "Just a heads up to people out there having there furnaces serviced by Plumbers they are not fully trained service personel and have learned by trial and error.(parts changer) There could be several things wrong with the furnace or nothing at all. It could be something as simple as the chimney not venting properly because of a newly installed range hood or exhaust fan. Does the furnace room have a fresh air from outside and its blocked off? "

Why not a plumber, are they not b ticket certified? Are you? I know a lot of knowledgeable plumbers out there. Do you know every single brand,make and model of furnace out there ever built(some are 60 years old)? Nobody does, but they try there best.

jason d.

2/5/2012 8:52:32 AM
Member since:
Sep 2008
Total posts:233
PM

sent you a PM....

resolver

2/5/2012 9:20:07 AM
Member since:
Jan 2012
Total posts:4
some what same issue

I had some what the same issue as this. It didnt happen everytime but when the furnace turned on i would have a little bang and then when furnace shut down it would be a louder bang.It was very scary it was so loud that it actually shook the cupboard doors upstairs. I had a serviced technician come over take a look and said nothing was wrong. I just couldnt take that as an answer so i took matters into my own hands(not saying that you should do the same). I sat down there until it did the same issue as most of the time it was at night when it happened. I ended up figuring out that it was my ducting expanding and contracting from the pressure of the air flow. I opened up some of the ducting just below my air conditioning coil and almost blew chunks. lol. I found a thick sheet of build up of dust, animal hair, and who know's what else. So I cleaned it out it came out in sheets then vacuumed out the finer stuff and wash down with fine mist and cloth. That fixed the problem and it even helped out with the air quality and health issues my daughters were having. In the end it helps to get your furnace serviced and make sure they clean that out. I did not expect to see all of this cause I just had the furnace replaced 3 years ago and I replace the filter once a month. Just a suggestion as to what it may be.

2910

2/5/2012 9:41:40 AM
Member since:
Mar 2010
Total posts:10
As a matter of Fact

yes I am a licensed gas fitter and also a certified RED Seal HVAC technician. Just because a person has a gas license and passed an open book test in plumbing school doesn't mean they know how to read a multimeter and look at the whole picture not just the symptoms. I don't do residential HVAC as a rule but when I do its usually when Someone else has butchered it. Yes there are some good older plumbers that can service the older furnaces, like Brian Reynolds. But most plumbers today have no training on gas and troubleshooting just the piping and install.

Truck Chick

2/5/2012 9:54:00 AM
Member since:
Jun 2006
Total posts:1763
The real deal

This just happened to my dad's furnace and he got it fixed. You need to replace the gas valve. Once you've done that, problem solved. It's not a DIY project, so PM me if you want the name of the guy that fixed my dad's furnace. It's a couple-hundred dollar touch, but I guarantee that'll fix your problem.

boots40

2/5/2012 10:10:21 AM
Member since:
Aug 2009
Total posts:54
furnace

Call in a HVAC tech,sounds like your gas valve is passing gas when not suppose to or could be that your pilot assembly has fallen down away from the burners causing a delayed ignition.Exploding furnaces mean gas accumulations!!!!!

mbstar

2/5/2012 10:13:28 AM
Member since:
Jun 2008
Total posts:5
2910

2910, I really don't think that you know what your talking about, I am a Journeyman plumber and the "test" that you speak of, and I'm sure you remember, is not open book and its a exam that is held by the provincial government not the school. I am in fact trained to "read" a multimeter. I can also turn the dial and properly use it. I was trained as a heating tech but went to school as a plumber so now I can do it all but I know some people cant do the heating and can only do plumbing but you should watch what you are saying on here because there are multiple companies in Brandon that rely on heating work in the winter.

RickR

2/5/2012 11:37:37 AM
Member since:
Mar 2008
Total posts:511
Our old

furnace did a similar thing. We watched it one day and actually witnessed flames shooting out!! YIKES!  
 
It turned out two rows of burners had turned sideways and were slow to light.  
 
It was an older furnace and we replaced that bad boy pretty quick after seeing that action!

keystone

2/5/2012 11:43:07 AM
Member since:
May 2011
Total posts:138
Guarantee??

  
Truck Chick said "This just happened to my dad's furnace and he got it fixed. You need to replace the gas valve. Once you've done that, problem solved. It's not a DIY project, so PM me if you want the name of the guy that fixed my dad's furnace. It's a couple-hundred dollar touch, but I guarantee that'll fix your problem. "

You can't guarantee nothing without seeing it. It's possible but I haven't seen a lot of passing gas valves in my years. If it is intermittent and it was inspected and checked out good, I'm sticking with the spark jumping in the wrong spot once in a while and delayed ignition. I'm interested to hear final findings though.  
 
You could turn the gas off and watch the furnace try and light a few times to see if it is sparking in an odd spot. It should lock out eventually, but a flip of the breaker will get it going again.

Truck Chick

2/5/2012 5:08:24 PM
Member since:
Jun 2006
Total posts:1763
Suit yourself.

  
keystone said "
  
Truck Chick said "This just happened to my dad's furnace and he got it fixed. You need to replace the gas valve. Once you've done that, problem solved. It's not a DIY project, so PM me if you want the name of the guy that fixed my dad's furnace. It's a couple-hundred dollar touch, but I guarantee that'll fix your problem. "

You can't guarantee nothing without seeing it. It's possible but I haven't seen a lot of passing gas valves in my years. If it is intermittent and it was inspected and checked out good, I'm sticking with the spark jumping in the wrong spot once in a while and delayed ignition. I'm interested to hear final findings though.  
 
You could turn the gas off and watch the furnace try and light a few times to see if it is sparking in an odd spot. It should lock out eventually, but a flip of the breaker will get it going again. "

Alright, then, I'll bet. Happy?

F8

2/5/2012 6:14:02 PM
Member since:
May 2008
Total posts:270
Take the fight outside.

Bunch of drama queens. As usual.

ranger fan

2/6/2012 9:03:31 AM
Member since:
Nov 2009
Total posts:85
f8

thanks couldnt have said it better myself  
but as per usual people on here have turn things into a s**t show ... all we wanted was some advice .. we got it  
thanks everyone for your valued input  
you can always count on fellow ebrandoners for thier informational input and of course a fight  
 
but once again we thank everyone for th info and help  
especially the videos they were "bang" on. now e have something to go with  
 
we have someone coming in today to check things out  
 

 
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