Tag Archives: high side

How to change car air conditioning valve core (Schrader valve)

Valve core replacement toolI recently purchased a used car. The only problem it had was that the air conditioning did not work – it would only blow warm air. After recharging the A/C system (see that blog post here: mike-thomson.com/blog/?p=1240), I could see that the Schrader valve core on the air conditioning low side port was leaking very badly. This blog post describes how to replace the Schrader valve core without losing your A/C system charge in the process. My car is a 1998 Saturn SL2, but this repair can be used as a reference for most vehicles. Continue reading How to change car air conditioning valve core (Schrader valve)