In a gas heated home a flue pipe vents the gases out through the roof.
Gas furnace flue pipe leaking water from storm.
Like all installations that poke through the roof sometimes a flue pipe develops leaks that result in water leakage into the attic or roof space when it rains.
It was very windy out during the storm.
There should be no water involved with a standard efficiency furnace.
If you have a whole house humidifier connected to the furnace there may be an issue which is causing the humidifier to leak into your furnace.
Improper flue exhaust can result in your furnace leaking water.
Much of the drain system and some of the parts are made of plastic.
This will cause your gas furnace to leak water.
A number of points may fail in the flue but they are mostly easy to detect and fix.
A standard efficiency furnace extracts some heat from the combustion gases and quickly vents them out the exhaust or flue pipe.
In some circumstances the plastic can be cracked.
This includes the drain pan and the drain piping.
There s a chance this has.
While this may look like water leaking from your furnace it s actually furnace gases that have turned into their liquid form.
Some causes of exhaust pipe restrictions are the flue cap is missing.
If this is the case it s best to call your local furnace repair team.
It sounds like the flue gas is condensing before it has left the flue.
The water drips on a piece of wood in the attic which apparently has always dried before causing an issue.
If the pan is cracked it needs to be repaired.
Other causes of leaking water around a furnace if you have a conventional standard efficiency furnace then its flue pipe may be incorrectly sized.
Exhaust pipe restrictions will cause the pressure in the flue to rise creating positive pressure and inhibiting proper exhaust.
You ll need a furnace technician to diagnose which of these is the issue and then fix it.
If your flue pipe is improperly sized or was installed incorrectly the gases move too slowly allowing them to cool down condense inside the flue and drip back toward the furnace.
If this is the case it could be an incorrectly sized flue pipe which is making water to drain back into the furnace.
Your humidifier should be getting annual maintenance from a professional to prevent this.
B vent leaking from seam in pipe.
Improperly installed vent connector that reduces exhaust velocity.
Broken condensation line condensate pump.
This can cause premature flue failure.
Gas furnace flue pipe leaking water from storm where my gas furnace flue pipe type b runs through my attic i had water dripping from the connections seams in the area where it makes a 45 degree bend water was inside the pipe from blown rain.
