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HomeRepair HelpMiller Central A/C RepairMiller Central air conditioner leaking at furnace or air handler Repair
Miller Central air conditioner leaking at furnace or air handler
If your Miller central air conditioner is leaking water at the furnace or air handler, the evaporator coil and condensate drainage system are the most likely places to look. An evaporator coil that is not tilted toward the drain outlet can keep condensation from flowing into the pan, allowing an air conditioner leaking water problem to develop. If the drip tray is leaking without overflowing, the tray may be cracked and require replacement. A cracked evaporator drain pan can cause the same condensate leak when water escapes without the pan overflowing. A clogged condensate drain line, drain tube, or drain trap is less common, but it can back up water and cause an air handler leaking water or AC leaking water at the furnace. Turn off power to the Miller unit before inspecting or clearing the drain. These drainage repairs are generally suitable for DIYers, but shut off the disconnect box and circuit breaker before working near electrical parts. Do not open the sealed system, handle refrigerant, or reposition the evaporator coil if the repair requires refrigerant work. Enter your model number to find the exact Miller replacement drain pan (also called a drip tray) or related part for your central air conditioner.
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 - Miller 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 - Miller 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 Miller central air conditioner leaking water at the furnace or air handler?
How do I fix an air conditioner condensate leak from the drain tube or drain trap?
How can I tell whether a cracked air conditioner drain pan or drip tray is causing the leak?
Can an improperly positioned evaporator coil cause my air handler to leak water?
How do I find the correct Miller replacement part for an air conditioner condensate leak?
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