Has the condensate pan cracked causing the leak?
Condensate forms on the AC coil as the AC runs for a while. AC units are supposed to have a condensate tube that's designed to drain the water. If the tube is plugged or otherwise damaged the condensate will back up and get into the furnace. To avoid damage you should make sure the condensate is draining properly.
First, make sure that it is the overflow. AC units have a condensation line. This is a necessary option as cooling the air causes condensation, much like a cold glass of water will condensate on the outside of the glass. The condensate line should be draining to a safe place, and draining whenever the unit is running. The unit should also have a secondary condensate line (overflow). this line should be separate from the main condensate line and be draining to a conspicuous place. If this line is draining, then you should check to see if the primary drain line is plugged. Anything from lint and dust to dead rats and mice have been pulled out of condensate drain lines. If you do not know how to get to this, call a professional and use the primary and secondary condensate verbiage to let him know that you are not an ignorant putz that he can take advantage of. That should save you a few dollars on the bill. Hope this helps. Terry
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AC units have a condensation line. This is a necessary option as cooling the air causes condensation, much like a cold glass of water will condensate on the outside of the glass. The condensate line should be draining to a safe place, and draining whenever the unit is running. The unit should also have a secondary condensate line (overflow). this line should be separate from the main condensate line and be draining to a conspicuous place. If this line is draining, then you should check to see if the primary drain line is plugged. Anything from lint and dust to dead rats and mice have been pulled out of condensate drain lines. If you do not know how to get to this, call a professional and use the primary and secondary condensate verbiage to let him know that you are not an ignorant putz that he can take advantage of. That should save you a few dollars on the bill. Hope this helps. Terry
The condensate drain is most likely stopped up.
Plugged fuel filter or filters
If it's part of the AC system you're just getting a little condensate from the cooling coils. Often the defroster will also cause a little condensate to build up. It has to go somewhere and many auto manufacturers have a tube or other device for allowing the condensate to leak out. Not only is it normal, it's necessary to get rid of the condensate.
Evaporator condensate drain plugged?Try to clean out with a wire or low pressure air - usually located behind the front passenger side wheel area
Plugged fuel or air filter? Plugged catalytic converter?
The condensate pan is probably unlevel and running over into your duct. Another possibility is that the drain pipe or hose has become clogged with dust or has been kinked, preventing condensate from draining properly.
Plugged evaporator drain?
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