Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpGibson Central A/C RepairGibson Central air conditioner leaking at furnace or air handler Repair
Gibson Central air conditioner leaking at furnace or air handler
When your Gibson central air conditioner is leaking water at the furnace or air handler, start with the evaporator coil and condensate drainage system. The most common cause is an evaporator coil that is not tilted toward the drain outlet, allowing condensation to miss the drain pan and overflow. If the pan is not overflowing, inspect the evaporator drip tray for cracks. A cracked condensate drain pan can also leak even when water is reaching it normally. Less commonly, a clogged condensate drain tube or drain trap causes water to back up and spill from the pan, creating an AC condensate leak or water under the furnace from the AC. Shut off electrical power to the air handler before clearing a drain tube or trap, and check the condensate pump and float switch if your system uses them. Replace a damaged Gibson drain pan (also called a drip tray), and enter your model number to find the exact replacement part for your specific central air conditioner. Do not open the sealed system or handle refrigerant while correcting an evaporator coil position; refrigerant work requires EPA 608 certification and a licensed HVAC technician.
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 - Gibson 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.
Enter model number to search for the required part specific to your product
Common
03 - Gibson 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 Gibson air conditioner leaking water at the furnace or air handler?
How do I clear an air conditioner condensate drain line or drain trap?
How can I tell whether the air conditioner drain pan or drip tray is cracked?
Why is my evaporator coil overflowing instead of draining properly?
How do I find the correct Gibson replacement drain pan or drip tray?
Shop by Gibson Central Air Conditioner Parts
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com