Chosen Solution

Can I change ac pressure switch without draining refrigerant on 2012 Ford F-150 3.7l v6

I believe you were miss informed but you don’t half to drain your a/c fluid. You have what is called a shrader valve. The pressure switch screws onto the sharder valve . If your issue is in that valve then yes you will lose pressure. So no the pressure does not half to evacuated when changing the pressure swith cause the sharder valve will keep the system contained

Confirmed. Schrader valve under pressure switch, along with green o ring on 2012 f 150 FX4 3.5L EcoBoost. You can unscrew without draining the system.

No I don’t think so. You will have to discharge the A/C system and replace it then recharge the system. If you don’t feel comfortable doing this yourself, then find someone else who can.

Just changed one on a 2014 f150 5.0. 4x4 and no I didn’t have to drain my AC system. Schrader Valve keeps fluid from escaping. I’m still watching people run for the nearest Tornado Shelter as I drive by though. Didn’t fix my loud high speed fan problem. Smh

My Ford F-150 2014 king ranch truck takes a long time to cool the interior. What can the problem be. It has around 40 , it’s on the green level .