Carb'ing question

[WhiskeyBiznass]

Probably a nub question, but I am concerned.
I have a porter (which tastes amazing) and a AAA in the keezer at the moment, we tried to force carb, after leaving them both at 12psi @ 48 degrees for about 4 days. We shook for 15 min, kept it at 12 psi for about 4 hours, but when we tapped em' they seemed flat. We decided to pump the pressure back up hoping to recarb the beer. Will this work? How long should I wait before I try to test them again?
Thanks for your help!

 

[Arkador]

12psi should take 2-3 weeks to carbonate

If you want it carbed faster do 30psi for 2 days, then 12psi for 5 days

 

[WhiskeyBiznass]

But, its still salvageable, right?

 

[JoeMama]

Of course its still salvageable! If you can - put the carbbing kegs in the fridge. CO2 is absorbed better in a COOL environment.
-Me

 

[WhiskeyBiznass]

Of course its still salvageable! If you can - put the carbbing kegs in the fridge. CO2 is absorbed better in a COOL environment.
-Me

They are in a keezer for the carb, i think its at 54 degrees right now, should it be colder.