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The 2009-2014 Ford F-150 was introduced for the 2009 model year as an update of the Ford full-size truck platform.

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Changing out ac pressure switch

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

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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.

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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

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I also believe the pressure switch will unscrew, if it has a hex on it to use a wrench then it should unscrew, there should also be a green o ring to help seal it up, I recommend to change the o ring, maybe it comes with the pressure switch, if the Schrader valve is leaking, give it a light twist in the tightening direction, the same as a tire valve tool will work but not too tight, easy to break or damage its internal seal.

How did you come to the conclusion that your pressure switch is bad please?

If the parts store has a new hose with pressure switch installed, and you dont notice the hex fitting for a wrench, then it would appear you need to do a full service job.

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Lance wird auf ewig dankbar sein.
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