A/C blowing lukewarm air

Here is a guide that talks about this issue in a little more detail:

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

I suspect the fact that it works sometimes, the system is just low on Freon. We can tell this by checking pressures. If you are going to have someone do that part of it then that is a good place to start. However, we could have a compressor issue so we need to check to see if the compressor is even coming on.

If it is not coming on, it could still be a low Freon level (almost empty) or a voltage issue, or just the compressor has failed.

So finding out if the compressor engages or not is an important piece of info.

Let me know if you have questions and what you find with this and we can go from there. Thanks

Okay. If it kicks on and off repeatedly that is called short cycling and is a sign of low Freon. Let us know if you want to try it but it’s not the easiest repairs but if you want to try it we can walk through it with you.

Thanks for the update.

I attached the process for your review.

As for knowing if it is full, they can tell this by hooking up a gauge set and seeing what the pressures were in the system. If they did this they should be able to tell you what the pressures were. Some people just push down on one of the valves and see if there is pressure and Freon in the system and think that is sufficient. These people should not be working on cars. So if they gave you a receipt, see if it lists the pressures. If they don't call and ask them what they were. If they don't remember then I would either get a second opinion or make them do it again and give you the numbers.

I attached a chart of proper pressures based on ambient temps. Let me know if you get the pressures and we can figure it out. Thanks