A/C making ticking noise just as I began recharging(R134a)

So yeah, I was recharging my A/C(134a) with a can purchased @ autozone. Just as it began to pump in there... a ticking started... now its ticking fast.... whole bottle is empty, disconnected it, and went inside car...ice cold. turned off a/c switch and the ticking stopped.

So whats up w/ that? :x

I figure that if the a/c works well for a week or two i know its fine(no leaks)

But as far as the ticking goes... i dont know where to begin. Is the compressor working but going bad? or virbating and hitting something?

:?: Has anyone ever experienced this :?:

Comments

  • bam-bambam-bam Council Member
    Ticking? How fast/what interval? What are your manifold gauge readings as this happens?

    Watch the compressor clutch and see if the "tick" coincides with the compressor cycling on/off. I bet that's what you're hearing.
    3 things (that I can think of offhand) will make the clutch cycle off.

    1) pressure switch - too high or low. Rarely a faulty switch, more often a restriction in the system or a faulty metering device (expansion valve). This is where actual gauge readings are invaluable, as you can watch the fault happen. Could even be a low charge. IIRC the system capacity is roughly 30 oz.(134a)

    2)Thermostatic switch - senses evaporator temperature and turns off the compressor to prevent freezing of the coil. ( almost surely NOT your problem, it ain't had time to freeze)

    3) WOT - I've noticed mine cuts out when you stomp it. IDK if it's from the TPS sensor input or what. Again, not likely your problem.
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