Skip the auto shop - Our mechanics make house calls

Q: Green AC oil coming out of the condensation line after recharge

asked by on

AC was blowing warm, hooked up a can of refrigerant, psi read 15psi, charged with compressor engaged to around 40psi. Air then was cold. came out 15 min later green slime all down frame and on ground. No visible leak at fire wall , no visible leaks anywhere else but out of drip tube. Recharged a day later after 10 min drip becomes green and psi slowly drops. Evaporator? ORINGS? any help is greatly appreciated.

My car has 70000 miles.
My car has an automatic transmission.

A: If you are seeing the green oil dye coming ...

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. Use a black light and yellow lens glasses to find the leak on evaporator. Before you do this, I’d also suggest using the light and glasses to look over the entire system to see if there are any other leaks present. Make sure to check compressor and condenser good.

If you need some help with these checks consider enlisting a certified mechanic, such as one from YourMechanic. They will be able to help you diagnose the source of the leak and make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Smoking/steam from back of engine.

When you install new parts, there could be some initial smoke or unusual vapors as factory coatings burn off, so the first thing you want to do is make sure that this is not a transient issue or false alarm....

Q: Leaking out of the freeze plugs

The freeze plugs were designed to pop out if the cooling system froze, in order to prevent the engine block from getting cracked. The freeze plugs are susceptible to getting damaged from corrosion in the cooling system, and will rust...

Q: Check engine light on.

The P0125 code does not necessarily mean you have a bad sensor, What it indicates is that the signal from the sensor is telling the computer that the engine is not warming up. That could be a sensor, or it...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...