Air conditioner leaking water

There is water leaking from the air conditioner on the passenger's side.
Experienced mechanics share their insights in answering this question :
Hi there. The air conditioning system will acquire condensation during operation. To prevent the condensation from spilling into the vehicle, there is a drain equipped. While the vehicle is running and the air conditioning system activated, it is normal for water to drain from the vehicle. Have a technician inspect the AC system and validate what the source of the issue is.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Water leaking out of a Mitsubishi air conditioner can be due to 3 common reasons: an overflowing or clogged drain pipe, frozen coils, or dirty air filters.
Low Refrigerant Level

When the refrigerant level of your car`s air conditioning system becomes low, it will decrease the pressure on your AC system. Lower pressure will cause the evaporator coils to ice up and freeze, and this can cause the condensate drain pan to overflow and leak water.

Poor airflow due to a dirty air filter or low refrigerant levels preventing heat absorption are common causes. When ice buildup on the coils melts, this could lead to an excess of water runoff to be flushed out through the condensate drain line, forming what appears to be an AC leak outside.
In fact, it is normal for your air conditioning unit to leak small amounts of water during routine functioning because it is producing condensation. As the system`s evaporator coil cools warm air that passes over it and absorbs heat and moisture from the air, condensation forms naturally.
As soon as you notice that your air conditioner is leaking, go ahead and turn it off. This is important even if the air in your home doesn`t feel any different, because it will stop the flow of water. The more water leaks out of your air conditioner, the more susceptible it becomes to further damage.
That humidity becomes liquid, so it`s natural that water should be expelled as it drains. But any water draining from your car AC should be a drip, not a waterfall! Any more than a saucer-sized patch is a concern.
Here`s the thing—you can`t repair an air conditioner`s compressor if it breaks down. The compressor of your air conditioner is essentially the heart of the system, responsible for allowing the refrigerant process that even makes it possible for your cooling system to… well… cool.
Fluid Leaks

The AC fluid is actually the refrigerant fluid that helps cool the air in the car, so if you see a leak, it`s definitely a sign that there is something wrong with the compressor. If the fluid starts leaking out, it can cause damage to other parts of the AC system and eventually lead to a total breakdown.

If your leak is at a place like an air hose connection, coupling, seal, gasket or control or shut-off valves, you might be able to fix the leak by tightening the connection. Tightening parts is one of the most straightforward ways to fix air compressor leaks.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Hot air mixed with cold blows from air conditioning
ANSWER : Hey there. You will most likely have to have a mechanic bypass the heater coolant lines to have this resolved. Your A/C may not be controlling the air flow inside the evaporator correctly out of the vents and may be the blend door actuator stuck in the heat position. Have the AC system diagnosed first before bypassing the heater.

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When idling, car overheats and A/C blows hot air – 2001 Saturn L100
ANSWER : Hello. The most likely cause of the issue that your are having would be a faulty cooling fan. The cooling fans purpose is to keep the radiator and condenser for the air conditioning cool during the idling function of the vehicle.

If the cooling fan is not working, this will cause the radiator and condenser to get very hot. When the radiator and condenser get hot, this can cause the vehicle to overheat and the air conditioning not to work. When the vehicle is driving at higher speeds, the force of air that is created towards the vehicle will flow through the radiator and condenser and therefore keep them cool. I would recommend having the cooling fan checked to make sure that it is working properly. If not, I would recommend having the cooling fan replaced.

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Air conditioner blows hot air on the left side and cold air on the right side
ANSWER : A common issue across many makes and models with dual AC in the temperature blend door actuator failing and causing drastic temperature differences between the driver and passengers sides. Have the HVAC system inspected by an experienced professional to find the specific cause. A certified professional from YourMechanic can come to your car’s location to diagnose the AC and assist with proper repairs.

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air conditioner not blowing air from dash vents, but blowing air from side vents
ANSWER : A few different items can cause the air to not blow out of the dash vents. The most common are a blend door or a control switch. The best method for the AC diagnosis feature can be found in the vehicles owners manual. I recommend having your AC checked by a qualified technician, such as one from YourMechanic, to have the problem diagnosed and repaired correctly.

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Water leak at front of car
ANSWER : Hi there. Water leaking into the vehicle accompanied with low coolant level points in the direction of a leaking heater core. The heater core is a device through which hot engine coolant flows. It’s design is similar to the engine radiator on a very small scale. Air is blown across the heater core and the heat from the coolant is drawn away with the air. This is the warm air we feel when selected on the HVAC instrument panel. Have an experienced technician verify the situation and inspect the AC/Heater system as well as refill the cooling system with the approved amount of engine coolant.

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Air conditioner blows hot air. 1995 Mercedes-Benz E300
ANSWER : Hi there, thanks for writing in about your 1995 Mercedes-Benz E550. This could be a variety of issues, such as no pressure or low refrigerant levels, a bad compressor clutch, or a compressor not engaging correctly. Check to see if the cooling fans are on when the AC is running. Most systems are designed to have them run when the AC is on. Also, check to be sure the compressor is engaged. Look to see if the pulley is spinning when the car is running with the AC on. If you need help with this, a qualified professional from YourMechanic can come to your car’s location to inspect the AC system and pinpoint the necessary repair.

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Air conditioner blowing warm air. Heat blowing warm air. Neither hot or cold
ANSWER : If the A/C system is full and pressures are reading correctly, and the cooling system is in proper working order (thermostat opens, no overheating, etc.), then most likely the problem lies with the dash. The climate control head unit may be at fault. One or more blend doors behind the dash may be stuck or broken. If you’re unable to fix this issue yourself, consider YourMechanic, as one of our mobile technician can come diagnose the issue with your A/C firsthand and help you fix it accordingly.

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I think there is a leak and water is dripping? Can you fix water or oil leaks? Thanks.
ANSWER : Hi There,
Yes, we can fix coolant and oil leaks. Generally, if you are noticing a water leak, this would be coming from the radiator, water pump or any of the radiator hoses around the motor that may be going to or from the radiator. Generally, when a water pump is going bad, you may hear a bit of a whining sound combined with the pump leaking. The most common place for the water pump to leak from is the pulley shaft seal which is in the front of the pump where the shaft comes out of the pump housing. When the pump is leaking, it will typically cause the engine to overheat as well. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your water pump.

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