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#1315308 --- 01/03/12 03:25 PM Re: Furnace problems..any ideas? [Re: bluezone]
123 Offline
Senior Member

Registered: 10/28/11
Posts: 845
Loc: From Ga.
Nope fresh air limit switch is bad. Batts were replaced last week.
$24.00 replaced new switch
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#1315469 --- 01/04/12 08:38 AM Re: Furnace problems..any ideas? [Re: 123]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
make sure there is not a blockage in the fresh air supply - snow, leaves, childrens toys, debris blown around in the wind...

make sure you test the flame sensor, heat exchanger sensor and the pressure switch for the power vent as they are usually connected

do you think that was the original problem or was the main board also bad?

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#1315470 --- 01/04/12 08:39 AM Re: Furnace problems..any ideas? [Re: 123]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: 123
Nope fresh air limit switch is bad.


sounds correct
check all seals
the flame color will usually change prior to the valve being closed for safety
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#1315471 --- 01/04/12 08:40 AM Re: Furnace problems..any ideas? [Re: bluezone]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: bluezone

if you have a high-efficient model that vents with PVC then check and make sure there is not anything blocking the outside vents (intake and exhuast)
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#1315634 --- 01/04/12 07:47 PM Re: Furnace problems..any ideas? [Re: bluezone]
123 Offline
Senior Member

Registered: 10/28/11
Posts: 845
Loc: From Ga.
[quote=bluezone]make sure there is not a blockage in the fresh air supply - snow, leaves, childrens toys, debris blown around in the wind...

make sure you test the flame sensor, heat exchanger sensor and the pressure switch for the power vent as they are usually connected

do you think that was the original problem or was the main board also bad?

[/quotYes on mother board. It worked up till a few days ago then crazy things started to happen. The mother board had three fried diodes. But again there had been no maintaince on it at all
so it might have been avoided as for the board issue
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#1315721 --- 01/05/12 07:36 AM Re: Furnace problems..any ideas? [Re: 123]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: 123
The mother board had three fried diodes.


not a good sign
is the new mother board a direct match to the old one?

how long are the intake and exhaust pvc piping?
how many elbows are on each one?
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#1315995 --- 01/05/12 09:31 PM Re: Furnace problems..any ideas? [Re: bluezone]
123 Offline
Senior Member

Registered: 10/28/11
Posts: 845
Loc: From Ga.
Originally Posted By: bluezone
Originally Posted By: 123
The mother board had three fried diodes.


not a good sign
is the new mother board a direct match to the old one?

how long are the intake and exhaust pvc piping?
how many elbows are on each one?


OEM replacement, it`s all working again.Thank you
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#1316074 --- 01/06/12 10:43 AM Re: Furnace problems..any ideas? [Re: 123]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: 123
it`s all working again.Thank you


good news

you may want to check to rest of the install if it was not done properly from the start

too long of run for the intake or exhuast or too many elbows will create problems with the vent motor/pressure and too much condensation
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#1318546 --- 01/17/12 08:47 AM Re: Furnace problems..any ideas? [Re: 123]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: 123
Thank you


check for a seperate single fuse just before it is wired to the unit to keep the main circuit from getting damaged from any surges

best to have a spare electronic ignitor as they tend to fail when the stores are closed
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#1318598 --- 01/17/12 12:19 PM Re: Furnace problems..any ideas? [Re: bluezone]
123 Offline
Senior Member

Registered: 10/28/11
Posts: 845
Loc: From Ga.
no it`s been working for 5 yrs but no maint was ever done.
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#1318779 --- 01/18/12 07:41 AM Re: Furnace problems..any ideas? [Re: bluezone]
richard Offline
Junior Member

Registered: 01/18/12
Posts: 2
Loc: anytown, USA
can't find a way to lessen up the cold, even turning the thermostat down it wont work. why?
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#1318788 --- 01/18/12 09:11 AM Re: Furnace problems..any ideas? [Re: richard]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: richard
can't find a way to lessen up the cold, even turning the thermostat down it wont work. why?


not sure what you are asking
need more details
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#1318819 --- 01/18/12 12:28 PM Re: Furnace problems..any ideas? [Re: richard]
123 Offline
Senior Member

Registered: 10/28/11
Posts: 845
Loc: From Ga.
Originally Posted By: richard
can't find a way to lessen up the cold, even turning the thermostat down it wont work. why?



On crack??
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#1318967 --- 01/19/12 12:25 AM Re: Furnace problems..any ideas? [Re: 123]
richard Offline
Junior Member

Registered: 01/18/12
Posts: 2
Loc: anytown, USA
my air conditioner just wont work .=(
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#1319047 --- 01/19/12 09:12 AM Re: Furnace problems..any ideas? [Re: richard]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
what is the outside temperature?
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#1319357 --- 01/20/12 11:33 AM Re: Furnace problems..any ideas? [Re: bluezone]
Creeper Offline
Member

Registered: 05/21/11
Posts: 104
Loc: Funkytown
Interstate installed my new furnace 6 yrs ago, when it rained it leaked around the piping they supposedly fixed it ha it still leaks. When it rains I have to keep a towel on top of my furnace to catch the rain drips.

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#1319380 --- 01/20/12 02:00 PM Re: Furnace problems..any ideas? [Re: Creeper]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: Creeper
When it rains I have to keep a towel on top of my furnace to catch the rain drips.


is this from the vent pipe?
is the vent pipe metal or pvc?
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#1496640 --- 03/16/17 09:23 AM Re: Furnace problems..any ideas? [Re: bluezone]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: bluezone
Originally Posted By: *Sparkey*
Blowing out cold air for ...


if it has a standing pilot make sure it has not gone out

does this have an ignitor? (meaning no standing pilot)
ignitor needs to be cleaned or changed

if you have a high-efficient model that vents with PVC then check and make sure there is not anything blocking the outside vents (intake and exhuast)


snow drifts may block the intake or exhaust pvc line
clear the snow away from either one
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#1496669 --- 03/16/17 01:58 PM Re: Furnace problems..any ideas? [Re: Creeper]
Timbo Offline
Silver Member

Registered: 07/18/12
Posts: 13036
Loc: CNY
Originally Posted By: Creeper
Interstate installed my new furnace 6 yrs ago, when it rained it leaked around the piping they supposedly fixed it ha it still leaks. When it rains I have to keep a towel on top of my furnace to catch the rain drips.

Ventilation, roof flashing and pipe insulation and blow-back may also bring "leaks".

As BZ points outs, if there isn't proper 'flow-through' condensation inside duct/pipes, could be the culprit.

Interstate should be happy [willing] to check it out.
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#1497089 --- 03/28/17 07:40 AM Re: Furnace problems..any ideas? [Re: bluezone]
bluezone Offline
Diamond Member

Registered: 12/19/04
Posts: 32003
Loc: USA
Originally Posted By: Creeper
When it rains I have to keep a towel on top of my furnace to catch the rain drips.


if rain is getting in then 'heated' air is leaking out causing higher heat bills

if the vent goes thru the roof then water is damaging the wood sections of your roof
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