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HomeRepair HelpGrandAire Central A/C RepairGrandAire Central air conditioner leaking at furnace or air handler Repair
GrandAire Central air conditioner leaking at furnace or air handler
Is your GrandAire central air conditioner leaking water at the furnace or air handler? The evaporator coil may not be tilted toward the drain outlet. This is the most common cause because condensate cannot flow into the drain pan correctly and may overflow. If the pan is not overflowing, inspect the drip tray for cracks and replace it if damaged. A cracked evaporator drain pan can cause an air conditioner leaking water problem even when drainage appears normal. If water is under the furnace from the AC, check the drain tube and drain trap for a clog. A blocked line can back up condensate and create an AC condensate leak, though this is less common. Turn off power to the unit before clearing a drain tube or trap. Enter your GrandAire model number to find the exact replacement drain pan or other part for your central air conditioner. Clearing a condensate drain is generally a reasonable DIY repair, but shut off power before working near the air handler. Repairs involving 240-volt wiring, the evaporator coil, refrigerant, or any sealed-system component require a licensed HVAC technician and EPA 608 certification.
01 - Evaporator Coil Not Tilted Toward Drain
To help the condensate water to flow towards the drain outlet in the pan, most installers will tilt the evaportor coil slightly towards the drain hole. If the evaporator coil is not level, or tilted incorrectly, water will not flow to the drain hole and may overflow the pan.
Common
02 - GrandAire Central Air Conditioner Drip Tray
The evaporator is normally tilted slightly towards the drain hole to help the water to drain properly into the drip tray. If water is leaking from the drip tray but the tray is not overflowing, the drip tray is likely cracked and will need to be replaced.
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Common
03 - GrandAire Central Air Conditioner Drain Pan
The evaporator is normally tilted slightly towards the drain hole to help the water to drain properly into the drain pan. If water is leaking from the drain pan but the pan is not overflowing, the drain pan is likely cracked and will need to be replaced.
Common
04 - Clogged Drain Tube or Drain Trap
When the air conditioner is running, condensation forms on the evaporator coil and drips into a drain pan. From there the water is directed through a pipe with a trap to a floor drain or condensate pump. If the drain tube or trap gets clogged, the water will back up and overflow the drain pan. If water is leaking from the evaporator pan, it is likely the drain tube or trap is clogged and will need to be cleared to allow the water to flow normally. Be sure to shut off the power to the unit before attempting to remove the clog.
Less Common
Frequently Asked Questions
Why is my GrandAire air conditioner leaking water at the furnace or air handler?
How do I fix a GrandAire air conditioner condensate leak?
What is the difference between a leaking evaporator drain pan and a clogged drain tube?
Can I replace the GrandAire air conditioner drip tray or drain pan myself?
How do I find the correct GrandAire air conditioner drain pan or drip tray replacement part?
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