Rx400h 2008 was sitting idling for 8 months.
Now no cool air is coming.
Can I use Leakstop ?

When I refill refrigerant gas do I have to add oil 11?
​​​​​​How to keep engine running?
what is it mean 100 + 50g after bubbles?
How much gas is needed?
How much nd11 oil is needed?
Where does it go and how?
what is it mean sub cool system?
How to add nd oil 11 properly and where?

Do I need a vacuum pump to add leak stopper Leakstop?

As much details as possible, even obvious ones, total noob I am

Help thanks

 

Adding oil is not necessary unless a component, such as a compressor, was replaced. Even then, it might not be necessary because some new compressors come with oil.

But how do you know your system is empty?
Did you put gauges on and check pressures?
Does the compressor clutch engage?