If there is nothing in the sysytem, its not going to come on.

 

MOst definitely refrigerant is gone once lines were opened. Vac th system if you have one--they are 80 bucks--but what a waste of cash for one time use or maybe 2nd in future--vac the moisture out is needed because it will oxidize in a/c parts eventually. I never say objective facts how long that would take--

remember you must put pag oil back in sys. prior to 134--whole system is 7 oz--if you vac system first--compressor takes oil--but not 7 oz and dryer takes oil also--

 

oh, your compressor might have come with oil--i put in sister n laws last week it came 1.5 oz and i added 3 oz--

where i live they will vac system and reharge system for 70 bucks

 

Thanks for your help. I managed to get the job done. One last thing. What temperature should I get when I put a thermometer in the air vent?

 

Generally between 40 and 45 depending on outside/ambient temp. If ambient is high say 100 degreees vent maybe 55,56,57--general rule--30 to 40 degrees cooler then ambient.

I know that is a wide range but thats what book says

 

Thanks.

 

I havea 2008 dodge nitro and when i cut on the defrost the compressor smokes. Smoke smells like rubber burning. Noice sound this a belt. So unsure what to do . I help on this ASAP.