Automotive Air Conditioning Information Forum (Archives)

Javyspecv02 on Sun September 05, 2010 3:06 AM

Year: 2002
Make: Nissan
Model: Sentra
Engine Size: 2.5
Refrigerant Type: R134a
Ambient Temp: 90
Country of Origin: United States

I have had my car since 2003 I bought new 11 miles on test miles.......Around 5 months later in 2003 i decided to put nitrous on car and blew engine. Dumb i know. So the refrigerant and compressor was taken off after 8000 miles. I had never refilled nor attempted to refill until now. I tried refilling and I researched and noticed that the compressor clutch wasn't rotating so i realized that the actual switch wasn't relaying any power so i used a fused wire and connected it to a toggle switch and there is went . I filled with about 15 oz of r134a freon. Everything was fine until out of nowhere after 20 min of idle (aux fan r working) it shot out a loud noise only to realize the freon was up in air so i hit the switch off. Out of curiosity i did some research and most people said it can be many things or simply just the AUX fan not working causing it to overheat and release freon through pressure release valve. I was wondering if this is normal and will it stop purging the freon out until right pressure or what can it be . I am so broke at the time and i live in Van Nuys california where it was 102 today ! That is y i do not go and pay a tech . So please I need help on what is it I can do with simple tools and a multimeter . Thank you

Javyspecv02 on Sun September 05, 2010 11:04 AM

Anyone ?? PleaseI need to drive my car and i dont know what to do at this time . Do i let it keep releasing the freon or what should i do?

ACProf on Sun September 05, 2010 11:47 AM

Quote
I am so broke at the time and i live in Van Nuys california where it was 102 today ! That is y i do not go and pay a tech . So please I need help on what is it I can do with simple tools and a multimeter

A multimeter isn't going to do you much good with servicing the sealed system on your AC system. Since you don't have the necessary tools and equipment to do the job right, you can't expect much.

THe system is off because there's NO refrigernat in the system. Proper procedure would be to evacuate the air and moisture in the system with a vacuum pump, and check to make sure it holds, and then recharge to the proper amount. You should replace that high pressure pop off valve - it won't seat correctly and you'll just lose the charge again.

Refilling the sytem without evacuating first won't do anything good for your system either. AND you still have to figure out why the fans didn't come on. You might be able to troubleshoot that with your multimeter.

Good luck!

iceman2555 on Sun September 05, 2010 2:43 PM

Noticed that there was not mention of an evacuation prior to the recharge, was this done? If not there is air in the system and since air is a non condensable gas....a good possibility of excessive temps.
Have the system serviced by a true 'pro' with the correct amount of refrigerant and insure that the fans are fully functional. Repost with pressures and temps (if possible) if the problem persist.

-------------------------
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson