Q: I have ac prob. I have checked ac level and filled correctly it is still blowing hot it was working fine then went bad the co .

asked by on

I am having ac issues

It’s hard to tell you whats wrong with the A/C when there is little to no information provided. You say that you checked the level and filled it, but unless it was done with a proper A/C machine or a scale and gauges, the refrigerant level may not be correct. The refrigerant charge should be properly verified using the proper equipment.

After that, there are several components in the A/C system that could cause a problem. The compressor may not be coming on, and this could be caused by a failed compressor, bad wiring, a bad temperature sensor, a bad pressure sensor, a bad switch, or any number of other things.

If the compressor isn’t coming on, and the charge level is good, then I would suggest checking the power at the compressor to see if it’s receiving power. If it is, then the compressor has failed and needs to be replaced. If there is no power there, then you will need to follow a wiring diagram and see where the power should be coming from, and work your way back.

A/C diagnosis can be very tricky, so I would recommend leaving this to a qualified professional, such as one from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. I have ac prob. I have checked ac level and filled correctly it is still blowing hot it was working fine then went bad the co .

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: How do I switch between outside air and recirculated air?

Sometimes you want a little cool air to come inside the cabin, but you don’t need the air conditioning system on. If you press the mode switch(labeled A/C) off, it will shut off the air conditioning and allow outside air...

Q: My 2001 automatic Miata idles really rough at stoplights when I run the AC, but not when it is off.

Hello, thank you for writing in. Two aspects about the issue lead me to believe the previous technician is correct. To start, the compressor is the only component that will effect the engine, as it is the part connected to...

Q: A/C not cooling in idle, only on high rpms

Hi there. This typically means that the fan itself has failed or there is a problem with the circuit. I usually start by checking for voltage supplied to the fan when the A/C is turned on. If there is voltage...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...