I just brought a 2009 manual Fit. It has 131000 miles on it. The AC works ok. ( I hardly use it and go old school with open windows)
​​​​​​When I took it in for a presale inspection all things were good.
The technician said I may want to recharge my AC. He said it was good but could be colder for his taste.
My question, finally, is should I even bother? And if I do should I try myself, after watching about 20 YouTube videos on what to do and what not to do.
Thank you in advance

 

Hard to know how much refrigerant is currently in your AC system, in order to add the correct amount. And I think adding too much can cause the system not to work properly. There are AC gauge sets that can help you get it close. Personally I took mine to a shop to do it. They have automatic machine that pump out the old refrigerant, do a vacuum to remove air and moisture, and pump in the new stuff in the correct amount.

 

The AC system holds a vary small charge, R134 is way more sensitive to fill pressures than the OLD R12 was..

I bought a set of AC gauges and use an adapter I built to connect the cans from a auto-part store.
If you over fill a small amount the AC pump will hydrolock and stop spinning. BMW does the same thing.
Sometimes ya just need the right tool for the job.
an OZ or so makes the difference.

 

I used this with the built in gauge.

 

The trick is that only has a gauge for one side, not both High and low, R134 can be off by 1/2 oz and overpressure or underpressure , not all rigs are the same and I'm sure the amount of lube and age is a factor.. The more comercial style gage lets you watch pressure balance and bleed excess back in to the can if you end up a tic high..

As long as you fill very slow and let it run a bit you can sneak up on it...
If you have a small scale you can weigh the can, charge a little weigh again and see how much weight went in, most cars have the fill spec in the shop manual.

 

Yeah that can only goes on the L side per the instructions. It worked for me is all I can say, but mine wasn't that bad and just needed to be a little colder.