
If your Goodman AC unit is leaking, it could be due to a blocked drain line or a cracked drain pan. A blocked drain line can be unclogged by flushing the line with water or compressed air. If the drip pan is cracked, it will need to be replaced. This can be done without disconnecting the Freon lines by carefully sliding the coil out of the cabinet and removing the screws holding the pan in place. It's important to be gentle during this process to avoid damaging the copper lines. Additionally, ensuring that the gasket is torqued evenly and that the inducer motor and hoses are inspected can help identify potential causes of the leak.
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What You'll Learn

Check for a blocked drain line or a cracked drain pan
If your Goodman AC unit is leaking water, it could be due to a blocked drain line or a cracked drain pan.
Blocked Drain Line
A blocked drain line can cause water to overflow and leak from the AC unit. To check for a blockage, observe if there is water pooling in the drip pan. If the drip pan is filling up with water, it could indicate a clogged drain pipe.
Cracked Drain Pan
If the drain line is intact, check for a crack in the drain pan. A cracked pan will cause water to leak through the crack instead of flowing through the drain line. Inspect the pan carefully for any signs of cracks or damage.
If you suspect a blocked drain line, you can try clearing it by using an empty water bottle to squeeze air into the pipe, as suggested by some users. Alternatively, you may need to use a specialty tool designed for blowing out drain lines, which uses a CO2 cartridge to seal and flush the line.
If the drain pan is cracked, you have a few repair options. You can use fiberglass resin materials or spray rubber seal to fix the crack, but ensure the pan is cleaned thoroughly first. If the threaded part of the pan is cracked, you may need to purchase a pipe nipple to thread into the crack and pack it with J-B weld.
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Flush the drain line with water or compressed air
If your Goodman AC unit is leaking water, one of the ways to fix it is to flush the drain line with water or compressed air. This is because a blocked or clogged drain line could be the cause of the leak, as water is overflowing into the drip pan and leaking outside.
To flush the drain line with compressed air, you can use a specialty tool made for blowing out drain lines. This tool uses a CO2 cartridge and seals the line to give it a good flush. Alternatively, you could squeeze air from an empty water bottle into the pipe, as suggested by a user on Reddit.
If you choose to flush the drain line with water, you can do so by using a shop vac. This method may require a trip to a hardware store to purchase the necessary equipment.
It is important to note that if the primary drain line is clogged, the water will overflow the coil pan and drain down into the safety pan. Therefore, it is crucial to unclog the drain pipe to prevent further leaks.
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Inspect the inducer motor and hoses for leaks
To inspect the inducer motor and hoses for leaks, begin by shutting off the power to your Goodman AC unit. This can usually be done by switching off the circuit breaker that controls the AC unit. It is crucial to turn off the power before handling any electrical parts or starting any repair work on your AC unit.
Once the power is off, you can start inspecting the inducer motor and hoses. First, remove and flush all hoses to check for any obstructions or clogs that could be causing a backup. Make sure to also inspect the gasket for any signs of leakage. If the gasket is not torqued evenly across all bolts, it may not be sealing correctly, which could lead to leaks.
If the inducer motor itself is leaking, you may need to replace it. However, before replacing the inducer motor, try tightening the hose clamp, as this has been known to fix the issue in some cases. If tightening the hose clamp does not stop the leak, then you will need to replace the inducer motor. Refer to the Goodman furnace manual for specific instructions and guidelines related to the inducer motor replacement process.
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Replace the drain pan without disconnecting Freon lines
If your Goodman AC unit is leaking water, it could be due to a blocked drain line or a cracked drain pan. If the drain pan is cracked, you will need to replace it.
To replace the drain pan without disconnecting the Freon lines, you will need to carefully slide the coil out of the cabinet by cutting the straps that hold the refrigerant lines and removing the cover. Be cautious not to kink the copper lines. Once the coil is out, you can access the screws at the back and front of the coil. The front screws can be easily removed, but the back ones may be more challenging.
After removing the coil, you can take out the old drain pan and replace it with a new one. Ensure that the new pan is secure and correctly fitted. You can then slide the coil back into place and reconnect the refrigerant lines.
It is important to note that this process may be challenging, and most residential contractors would rather sell you a new unit than attempt this repair. Therefore, it is recommended to seek the help of a professional technician with experience in this specific repair.
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Check the gasket and collector box for cracks
If you are experiencing leaks in your Goodman AC unit, it is important to check the gasket and collector box for cracks. The gasket is responsible for creating an airtight seal, while the collector box collects condensate or water that needs to be drained away.
To check for cracks in the gasket, you will need to remove the inducer motor and some hoses to access the collector box. Scrape off the old gasket and inspect it for any tears or cracks. If the gasket is cracked, it will need to be replaced with a new one, ensuring that it is torqued evenly across all bolts to seal properly.
Similarly, to inspect the collector box for cracks, you will need to remove it and the gasket material surrounding it. Check the collector box, especially around the screw holes, for any signs of stress breaks or cracks. If cracks are present, the collector box will need to be replaced.
It is recommended to use high-temperature silicone or RTV silicone to seal the new collector box and gasket. However, avoid applying silicone directly to the gasket. Instead, apply it to the screws of the collector box before securing it in place. Allow the silicone to cure for at least six hours, and ideally 24 hours, before turning on the AC unit.
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Frequently asked questions
If you notice water dripping from the unit, or the drip pan is filling up with water, then your AC unit is likely leaking.
There could be a few reasons for a Goodman AC unit to leak. One common issue is a clogged drain pipe, which can cause water to back up and overflow. Another possibility is a cracked drain pan, which can cause water to leak through the cracks instead of draining properly. A less common issue could be a frozen system, which can cause water to overflow the coil drain pan.
If the drip pan is cracked, it will need to be replaced. You can attempt to do this yourself by carefully following the instructions provided by experts, but it is recommended to consult a professional for guidance. If the issue is a clogged drain pipe, you can try unclogging it by using a tool made for blowing out drain lines, or by squeezing air into the pipe using an empty water bottle.
To prevent future leaks, it is important to regularly clean and maintain your AC unit. Ensure that the drain lines are not clogged, and check for any signs of cracks or damage in the drip pan. It is also recommended to run the furnace on a heat cycle with electrical tape across the door sensor to identify any potential leaks.










































