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HVAC question #7966400
10/07/23 11:44 AM
10/07/23 11:44 AM
Joined: Mar 2008
Posts: 5,917
n.e, iowa
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coonman220 Offline OP
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coonman220  Offline OP
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My 2 stage gas furnace is nearly 23 yrs old, I put new filter in every month to 6 wks. Keep heat set 72 yr round . Had earlier yrs alot parts an blower motor put in. Not a one problem in at least 5-6 yrs. No rivets in bottom furnace a yr ago. That would indicate a heat exchanger fail. I was told. See no rivers from it lay on bottom furnace . Got appliance repair protection plan now an got free annual HVAC next week. Well not free as I pay for it every month . Anyone know on how u know heat exchanger crack ? My windows in house always fog up moisture alot an lately when furnace on but I think do that for many yrs . I hear if they find bad heat exchanger they shut ur gas off right now, I have CO2 detector upstairs

Last edited by coonman220; 10/07/23 11:45 AM.
Re: HVAC question [Re: coonman220] #7966409
10/07/23 11:59 AM
10/07/23 11:59 AM
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Posts: 1,291
WI
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Mando Offline
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Mando  Offline
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Put a carbon monoxide detector in your basement.

Re: HVAC question [Re: coonman220] #7966516
10/07/23 04:19 PM
10/07/23 04:19 PM
Joined: Jan 2012
Posts: 669
saskatchewan canada
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kingrat Offline
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saskatchewan canada
Turn on the fan only. Take a bbq lighter and put it in front of the burner tube, if the bbq lighter blows out or dances lots its cracked. There's lots of good videos on you tube about how to test it. And yes if they find it they will disable your furnace immediately.

Last edited by kingrat; 10/07/23 04:19 PM.
Re: HVAC question [Re: coonman220] #7966590
10/07/23 06:00 PM
10/07/23 06:00 PM
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n.e, iowa
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coonman220 Offline OP
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There a cover on furnace . If take off. Safety switch is released an won't run..I guess find out . I would think there be other symptoms . I rember when they put new gasline in. A technician had go house an look at anything do with gas. He couldn't figure out there safety switch on front panel an kept screw around furnace. Has show him how lite water heater. He wasn't who is come out though . Furnace pretty pricey . There lot different furnaces can buy. Some cheaper but installation is the thing. I read it smell.like formaldehyde . If crack heat exchanger . The windows sometime fog at nite. Something do with dry out an inside not. All I know is I heard rivots on heat exchanger fall down an u see them if shot. No rivots lay around . Some tech was say my furnace last 30 or more yrs. If we're cracked, I have to see them myself

Last edited by coonman220; 10/07/23 06:03 PM.
Re: HVAC question [Re: coonman220] #7966630
10/07/23 07:39 PM
10/07/23 07:39 PM
Joined: Dec 2022
Posts: 4,284
illinois
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jalstat Offline
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illinois
CO detector not CO2 big difference

Re: HVAC question [Re: coonman220] #7966636
10/07/23 07:51 PM
10/07/23 07:51 PM
Joined: Nov 2007
Posts: 9,705
St. Cloud, MN
trapperkeck Offline
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St. Cloud, MN
Installing a furnace isn't rocket surgery. I replaced the gas furnace and central air unit in our home myself. I had a licensed HVAC person inspect my work after I installed it and it was good to go. Ordered my furnace from Alpine Air in Colorado. I think I paid about $2800 for furnace, A/C unit and all the parts to install, delivered to my door. About $10,000 less than a couple of HVAC companies wanted.


"The voice of reason!"
Re: HVAC question [Re: trapperkeck] #7966663
10/07/23 08:33 PM
10/07/23 08:33 PM
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Posts: 1,291
WI
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Mando Offline
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Originally Posted by trapperkeck
Installing a furnace isn't rocket surgery. I replaced the gas furnace and central air unit in our home myself. I had a licensed HVAC person inspect my work after I installed it and it was good to go. Ordered my furnace from Alpine Air in Colorado. I think I paid about $2800 for furnace, A/C unit and all the parts to install, delivered to my door. About $10,000 less than a couple of HVAC companies wanted.


How many people have the equipment to braze the line set or vacuum the lines?

Re: HVAC question [Re: coonman220] #7966668
10/07/23 08:37 PM
10/07/23 08:37 PM
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mo.
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nate Offline
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Make the door switch then start the furnace and watch for flame roll out,

Re: HVAC question [Re: Mando] #7966674
10/07/23 08:44 PM
10/07/23 08:44 PM
Joined: Nov 2007
Posts: 9,705
St. Cloud, MN
trapperkeck Offline
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St. Cloud, MN
Originally Posted by Mando
Originally Posted by trapperkeck
Installing a furnace isn't rocket surgery. I replaced the gas furnace and central air unit in our home myself. I had a licensed HVAC person inspect my work after I installed it and it was good to go. Ordered my furnace from Alpine Air in Colorado. I think I paid about $2800 for furnace, A/C unit and all the parts to install, delivered to my door. About $10,000 less than a couple of HVAC companies wanted.


How many people have the equipment to braze the line set or vacuum the lines?

You're right, I had the fella who checked my work do that part and charge the A/C. The bill from him was $160.


"The voice of reason!"
Re: HVAC question [Re: coonman220] #7966709
10/07/23 09:36 PM
10/07/23 09:36 PM
Joined: Aug 2010
Posts: 10,737
Asheville, NC
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charles Offline
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Asheville, NC
Beware of performing tasks requiring a license. If your house burns down, your homeowner policy may not pay. On the application that you signed, there is a question regarding HVAC, electrical, and plumbing done by a licensed contractor.

When I was in the insurance business, an applicant bragged during a telephone call by an underwriter about all the work he had done himself. His application for insurance was promptly denied.

Had another client that did some electrical work himself. House burned down and his wife was killed. The company cancelled his coverage on his renewal date, a few months before the fire.

Re: HVAC question [Re: coonman220] #7966724
10/07/23 10:28 PM
10/07/23 10:28 PM
Joined: May 2016
Posts: 817
Illinois
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DRF Offline
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Illinois
Our windows used to get condensation on them. Turned out to be a mostly clogged chimney.

Re: HVAC question [Re: charles] #7966735
10/07/23 11:23 PM
10/07/23 11:23 PM
Joined: May 2011
Posts: 16,401
Oakland, MS
yotetrapper30 Offline
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Oakland, MS
Originally Posted by charles


When I was in the insurance business, an applicant bragged during a telephone call by an underwriter about all the work he had done himself. His application for insurance was promptly denied.

Had another client that did some electrical work himself. House burned down and his wife was killed. The company cancelled his coverage on his renewal date, a few months before the fire.



Exactly the reason I've never had nor intend to have homeowner's insurance. It's supposed to be homeowner, not insurancecompanyowner. If I can't fix the AC in my house, or heat my house with wood.... is it really even my house?


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Re: HVAC question [Re: coonman220] #7966736
10/07/23 11:25 PM
10/07/23 11:25 PM
Joined: May 2011
Posts: 16,401
Oakland, MS
yotetrapper30 Offline
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Oakland, MS
I'm a bit confused about all the comments about windows with condensation on them. Is having condensation on the inside of your windows in cold weather NOT normal??


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Re: HVAC question [Re: coonman220] #7966739
10/07/23 11:37 PM
10/07/23 11:37 PM
Joined: Mar 2008
Posts: 5,917
n.e, iowa
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coonman220 Offline OP
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So older furnaces are likely to have crack heat exchangers ? They shut it furnace down if so ?

Re: HVAC question [Re: coonman220] #7966791
10/08/23 05:34 AM
10/08/23 05:34 AM
Joined: May 2011
Posts: 342
Ohio
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Mike C Offline
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Ohio
A little moisture is one thing, but excess Condensation on your windows is not normal, unless the heated areaís windows are single pane. Condensation forms due to the products of combustion not ventilating properly. Cracked exchanger or blocked chimney are two causes. This moisture also is a sign of higher than normal CO levels which could be dangerous and/or lethal.

Re: HVAC question [Re: yotetrapper30] #7966839
10/08/23 07:06 AM
10/08/23 07:06 AM
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WI
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Mando Offline
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Originally Posted by yotetrapper30
Originally Posted by charles


When I was in the insurance business, an applicant bragged during a telephone call by an underwriter about all the work he had done himself. His application for insurance was promptly denied.

Had another client that did some electrical work himself. House burned down and his wife was killed. The company cancelled his coverage on his renewal date, a few months before the fire.



Exactly the reason I've never had nor intend to have homeowner's insurance. It's supposed to be homeowner, not insurancecompanyowner. If I can't fix the AC in my house, or heat my house with wood.... is it really even my house?

Do you have a mortgage? If we don't get insurance or let it lapse, the lein holder will put it on at our cost. Usually more than what we pay.

Re: HVAC question [Re: yotetrapper30] #7966855
10/08/23 07:30 AM
10/08/23 07:30 AM
Joined: May 2016
Posts: 817
Illinois
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DRF Offline
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Illinois
Originally Posted by yotetrapper30
I'm a bit confused about all the comments about windows with condensation on them. Is having condensation on the inside of your windows in cold weather NOT normal??

In my case yotetrapper the condensation wasnít the typical you sometimes see, it was heavy at the bottom of the glass and not foggy, just drops of water. Hadnít lived here long and just assumed thatís how this house was and I used to just wipe it up. One morning I noticed the furnace would turn off and on much quicker than normal. Short cycling I believe the furnace guy said. He found the clogged chimney and that was the issue. Then he told me to get a carbon monoxide detector in there somewhere close to the furnace. Also donít get me started on homeowners insurance lol

Re: HVAC question [Re: coonman220] #7966912
10/08/23 09:26 AM
10/08/23 09:26 AM
Joined: Mar 2008
Posts: 5,917
n.e, iowa
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coonman220 Offline OP
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Just see condensation on windows sometimes in morning. Later in day..nothing . I take the detecter down by furnace but probly most detectors don't go off, unless quite bad

Re: HVAC question [Re: coonman220] #7966916
10/08/23 09:40 AM
10/08/23 09:40 AM
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WI
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Mando Offline
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Can't bad leaking windows have condensation too?

Re: HVAC question [Re: coonman220] #7966926
10/08/23 09:53 AM
10/08/23 09:53 AM
Joined: Nov 2007
Posts: 9,705
St. Cloud, MN
trapperkeck Offline
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Originally Posted by coonman220
Just see condensation on windows sometimes in morning. Later in day..nothing . I take the detecter down by furnace but probly most detectors don't go off, unless quite bad

Actually, those detectors are very sensitive.


"The voice of reason!"
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