I tried to recharge my ac but it will not take the freon. The ac compressor is not tuning. What is wrong? Is the ac compressor bad?

 

Are you assuming low Freon is the problem?

Any chance the AC system was overfilled with Freon?

The compressor should be running when adding Freon.

Did the AC compressor just quit or did the temp of the cold air coming out of the vents increase first?

Is there a a site glass window on the AC system drier?

 

Yes ... I thought it was low because I wasn't getting any cold air. I don't know. I haven't had the car that long only for a few months. I got the car up to operating temp and I turned the ac on with the fan on high. The compressor was not turning. No cold air came out the vents. There seems to be a sight glass next to the high input line, but I didn't see anything, or I didn't know what I was looking at.

Thanks for reading my post

 

The compressor needs to be working or the system evacuated to draw in the fluid into the low side. The system may be too low or out of Freon to allow the compressor to work. Don't operate the compressor if too low or out as it will be damaged.

If you can do a high/low pressure test of the system using a gauge set. Some auto part stores loan or rent this tool. The internet has videos on the gauge set use and how to interpret the gauge readings.

If no or low Freon then you will need to take more steps before you can recharge the system.

The site glass is a way to do a quick and dirty test for Freon but the compressor needs to be running.

 

I see there is a sight glass, but I don't know what I am suppose to see in it. There doesn't seem to be anything ... it looks clear. Is it possible to locate the relay and jump it so the compressor will spin to allow the freon to get into the system?
Thanks for posting.

 

The compressor needs to be running to use the sight glass.

IF the AC system has a normal fluid level, the fluid behind the glass will appear clear with compressor off. When the compressor starts up the fluid will have bubbles then turn clear again as the bubbles go away. When the compressor is turned off, the fluid will again have bubbles then become clear.

If compressor operating and the site glass stays clear there is either too low/no fluid or too much. If constant bubbles the fluid is too low.

The compressor clutch is turned on/off by a relay.

The relay is located in a relay/fuse box on the left side of the engine compartment. There are two rows or relays that may appear to look the same. The AC relay is 2nd one down on the row of relays that is nearest the edge of the box. For reference the small fuses in the box would be at the bottom of the box.

The relay has 4 connections at the socket. Two connections have constant 12v power with ign on to power the +12V terminals for the relay solenoid and relay AC switch. One connection goes to the clutch to power it. One connection (from negative terminal of the solenoid) goes to a computer. The computer turns the relay off by grounding this wire and completing the power circuit for the solenoid.

One can jump the terminals for the 12v relay switch power/solenoid power wire to the clutch wire terminal. One can determine the terminals on the relay and socket by using a ohm/volt meter.

Don't operate the AC too long or it will be damaged from lack of lubrication which is mixed with the Freon.

 

Does the compressor has to be spinning in order to get it to take the freon? Thanks for the post and for reading mine.

 

Yes the compressor needs to be running.