Green leaks and burnt smell. Ac doesnt work well.

My car is leaking a green fluid on the left front drivers side. There is also a burt smoke smell. I noticed a small bit of smoke or steam and it smells like burnt rubber but Im pretty sure its more than that. Also my AC blows, but its not very cold. I drove it for an hour and it still want cold, even with it being on max AC. What could this be?

My car has 125000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
If the anti-freeze currently installed in your engine is green in color, what you are probably seeing is a coolant leak. Engine coolant can leak externally through a hose, radiator, water pump, etc. These external leaks are typically pinpointed by simple pressure testing of the cooling system. To find the leak that exists in your case, and get the required repair estimated, please request an engine cooling system leak diagnostic and the responding certified mechanic will get this resolved for you. With regard to the odor, that could be related to the leak. If the odor is of rubber, it could be due to a problem with an engine drive belt. Whatever the origin of the odor is, it would be evaluated at the same time that the leak diagnostic is performed.

With regard to the A/C system, there are innumerable things that can go wrong with an A/C system to cause a degradation in cooling and so the best thing to do is request an air conditioning system inspection. The possibilities that might account for the problem you are experiencing range from a stuck heater control valve to a malfunctioning expansion valve, low state of charge, refrigerant leaks, faulty cooling fans on the condenser and so forth. The only way to pin it down is to get the system professionally inspected and diagnosed. Once diagnosed, the mechanic will be in a position to give you a repair strategy to get the A/C system fully functioning and he or she will estimate the cost of the required repair. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

How to Identify and Fix Common car Problems ?

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

If you are seeing the green oil dye coming out of the A/C evaporator drain tube then you most likely have a leaking evaporator or expansion valve on the evaporator. The green dye can be seen using yellow glasses and a black light. You can have the refrigerant reclaimed and remove evaporator.
Reasons a Mitsubishi Lancer AC Isn`t Working. The most common reasons a Mitsubishi Lancer ac isn`t working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. You may not realize there`s a refrigerant leak until the air conditioner stops blowing cold.
Hissing Sound

As the refrigerant leaks, you`ll notice a hissing noise. If it`s a large leak, you might even hear a gurgling sound. Any time you notice a hissing or gurgling noise, turn off the AC system and contact an HVAC service technician immediately.

A chlorofluorocarbon used in AC systems, Freon, absorbs indoor heat and releases it outside. Smelling like chloroform, or sweetish car coolant, Freon, while mostly odorless, is still detectable.
Green. Green fluid leaking almost always means antifreeze. Antifreeze leaks are one of the most common leaks when it comes to vehicles. Usually, the leak has come from a hose or clamp not attached properly.
Answer: Refrigerant and Freon are gases that are both colorless and odorless. Refrigerant leaks cause damage to the ozone layer.
If there is a leak, dye will come out with a bright yellow-green color to help you pinpoint where the leak is located.
You may smell an odor of ether, chloroform, or sweetness from the vents or the air conditioner itself. This is the odor of the refrigerant. According to the Department of Energy, refrigerant leaks are harmful to the environment, and exposure to the refrigerant may be harmful to your health.
Electrical shorts, burning wires or hoses, and even excessive dust in the vents can cause a burning plastic smell in your vehicle`s air conditioning.
Why does my car smell like burnt rubber? A faulty AC compressor, hot rubber or slipping belts, leaking or clogged heater, rubbing tires, and a defective alternator are common culprits.
If you notice a leak that is pink, yellow, or green in color, you are witnessing a coolant leak. Coolant can also leak from multiple areas of your car`s cooling system. Ignoring a coolant leak is not a wise choice, as it will ultimately result in your car`s engine overheating.
If the radiator is full (check the level when the engine is stone cold ONLY for safety reasons or check the coolant level in the reserve tank; if reserve tank still has coolant, radiator is probably full), and the car is not overheating it is safe to drive the car on a LIMITED basis.
R290 is pure and eco-friendly, and has been named as the preferred green gas refrigeration option by the Environmental Protection Agency (EPA) due to its high efficiency and energy savings alongside its environmentally friendly impact.
The most important danger, however, is the harm a refrigerant leak can have on your health and the environment. Refrigerant contains chemicals that can be poisonous if breathed in. Because it is tasteless and odorless, you likely won`t know it is entering your system until you experience refrigerant poisoning.
But perhaps the simplest method is the “odor test.” The smell that comes when a hose is connected to the system is both pungent and revealing. Once sniffed, it`s never forgotten and is one of the best indicators of a compressor burn-out.
One of the most common causes is a clogged air filter, which can restrict the airflow and prevent the air conditioner from cooling properly. Other causes can include a malfunctioning thermostat, a refrigerant leak, a problem with the compressor, leaking ductwork, or leaking windows.
If your central AC is not blowing cold air, the refrigerant may be the problem. The unit could be running low and need additional refrigerant added. The most likely cause of this is a leak. A leak not only keeps the AC unit from cooling properly, but also it can cause other issues within the home.
First, check your filters and coils for dirt and debris that may be impeding airflow. Once you`ve cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn`t blow cold air, it could be that refrigerant levels are too low.
As most refrigerant leaks are found at the indoor coil, an evaporator coil can be replaced to fix a leak. By hiring a professionally licensed HVAC company to replace this coil for you, you can expect to spend anywhere between $1,200-2,000 depending on the brand as well as how much refrigerant will need to be replaced.
A refrigerant leak is the result of tiny holes or cracks in the coils. When coolant leaks through these holes, due to its high pressure, it produces a hissing noise. If the leak is large enough, there may even be a bubbling or gurgling noise coming from your unit.
Freon usually travels through closed copper coils in an AC unit, but these coils can crack and result in an AC coolant leak. A freon leak will produce a smell between sweet and chloroform.
Getting a Moldy or Musty AC Smell? A stale and dingy smell is by far the most common and foul smell experienced from ACs. If your AC smells musty, the general cause is the accumulation of water in the drain pan or drip lines (or ducts in case of ducted systems), which can cause fungus or mildew to grow.
Freon leaks are typically found at the schrader valve, valve cores, evaporator coil, copper lines, “U” connectors, weld joints, electrical connection to the compressor body, or the copper tubing. Most of the time, the leak will usually occur in the evaporator coil.
An AC refrigerant leak is fairly common but not always obvious. Coolant leaks can greatly affect the efficiency of an HVAC system. Also, when leaks happen, home comfort is adversely affected. Plus, there are certain health issues that could come into play if the leak is not resolved immediately.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Green leaks and burnt smell. Ac doesnt work well.
ANSWER : If the anti-freeze currently installed in your engine is green in color, what you are probably seeing is a coolant leak. Engine coolant can leak externally through a hose, radiator, water pump, etc. These external leaks are typically pinpointed by simple pressure testing of the cooling system. To find the leak that exists in your case, and get the required repair estimated, please request an engine cooling system leak diagnostic and the responding certified mechanic will get this resolved for you. With regard to the odor, that could be related to the leak. If the odor is of rubber, it could be due to a problem with an engine drive belt. Whatever the origin of the odor is, it would be evaluated at the same time that the leak diagnostic is performed.

With regard to the A/C system, there are innumerable things that can go wrong with an A/C system to cause a degradation in cooling and so the best thing to do is request an air conditioning system inspection. The possibilities that might account for the problem you are experiencing range from a stuck heater control valve to a malfunctioning expansion valve, low state of charge, refrigerant leaks, faulty cooling fans on the condenser and so forth. The only way to pin it down is to get the system professionally inspected and diagnosed. Once diagnosed, the mechanic will be in a position to give you a repair strategy to get the A/C system fully functioning and he or she will estimate the cost of the required repair. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Honda Civic 2008. AC stopped working suddenly and engine check light came ON for a day.Next day AC worked and no engine light.
ANSWER : Hi there. In both cases, when an AC system is not working and a warning light is coming on the dashboard, typically a professional mechanic will complete the same initial inspection, which is to download the stored error codes that triggered the warning light initially. This tends to give them an idea as to what is causing the problems. This could be something as simple as an electrical relay that is faulty or loose or an indication of a computer related "glitch". Either way, the best way to move forward is to have a professional mobile mechanic complete a check engine light inspection.

My dash board don’t work my front light work when I change my light into high beam and my back window won’t go down
ANSWER : As unfortunate as it is, your vehicle would be considered flood damaged. Diagnosing electrical problems in a flood damaged vehicle is nearly impossible. This would take many hours or even days to determine which wiring harnesses and circuits have been affected. Then nearly all of the wiring under the dash would likely require replacement as well as many sensors and switches. On a BMW vehicle, the amount of wires and switches are likely more than that of a lower end vehicle. Due to the inefficiency in cost, you would likely be able to purchase another BMW like yours for less than what it would cost to fix your car. Many insurance companies would consider this type of damage to total out the vehicle unfortuantely.

I’ve been told I have leaking valves. Burning rubber smell, no external leaks but dripping noises, car not overheating
ANSWER : Hi there. It sounds like the valve cover gaskets are what is leaking. The gasket is made of rubber and can become hard and brittle over time and start leaking oil. The leak may not be one where it is literally leaving a puddle, but more along the lines of seeping out. The rear valve cover tilts toward the cab of the vehicle and when it leaks oil, this oil makes its way onto the very hot exhaust manifold. Both valve covers can leak enough oil at the corners toward the transmission to run down the engine block and end on the hot exhaust center pipe under the oil pan. Both of these pipes will literally burn the oil and produce the smell and sometimes smoke or what looks like steam. The condition will not go away on its own and will only get worse with time and use. I suggest having a qualified technician perform an inspection to confirm the leaks and avoid replacing unnecessary parts. Your Mechanic has several technicians available that can assist you with an oil leak inspection.

Car cabin smells of AC refrigerant at times and now the AC is not cooling after about a month of filling it .
ANSWER : If you have detected a refrigerant and oil mist in the cabin, then an evaporator "area" leak is likely. However, any time there is one leak, the entire system should be pressurized (whether pre or post repair) and tested for leaks in order to ensure trouble free operation. To request diagnosis and repair of your system, please use YourMechanic’s a/c diagnostic service page and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

My AC does not always work. If I fiddle with the blower knob I can ususally get it to work on the lowest setting.
ANSWER : Hi There,
It sounds like you may have a faulty blower motor resistor. The highest speed setting may still work because in most cars in the highest fan speed settings the current bypasses the blower motor resistor. In some cars, if the resistor is failed, the fan may stop working completely. Another reason a blower motor resistor may fail is when the blower motor has a mechanical problem or when a foreign object jams the blower motor fan blade and prevents it from spinning freely. This leads to increased current through the resistor and causes it to overheat and fail. I would suggest having an expert from YourMechanic come to your location to diagnose your system to determine what may be causing the fan not to work properly.

On start AC is working fine, after 5-10 mins i am starting to hear loud fast clicking noises.!?
ANSWER : The compressor clutch on the vehicle may be caused by an excessive clutch to pulley gap or an excessive resistance in the compressor field coil. A check on the gap in the pulley to clutch can be performed by using a feeler gauge and the coil can be checked using a multimeter. If either is out of specs then repair or replace it as necessary. I’d suggest getting your vehicle inspected by a qualified technician, such as one from YourMechanic, to perform these checks and properly diagnose your A/C issue firsthand.

My ac slowly stopped working after just two days.
ANSWER : The air conditioning system relies on a full system charge to function properly. A poorly operating air conditioning system is usually caused by a low charge from a leak. If the air conditioning compressor electronic clutch fails, the fuse blows or the relay burns out, you will notice the lack of cooling. The refrigerant inside the air conditioning system is a gas whose use and handling require a certification. Consider hiring an experienced technician like one from YourMechanic who can come out and give your vehicles air conditioning system a performance check which includes checking system pressures in an effort to offer you a more personal diagnosis.