Bad Coil? Green Discoloration On Coolant Lines

Discussion in 'HVAC Heating & Cooling' started by e2139adfa, Jan 16, 2021.

  1. e2139adfa

    e2139adfa New Member

    Jan 7, 2021
    I have a 20 year old system put in by the builders. Do these coils look like they need to be replaced? Is my refrigerant leaking? What does it mean when there is some green discoloration on the coolant pipe and rust on the coils? My system uses R22. Thank you

  2. DavidDeBord

    DavidDeBord Member

    Aug 9, 2020
    Hamersville, Ohio
    Greetings e2139,

    As long as the System has not lost it's charge, the "green color" on a coil will not hurt it.

    What you should have done on a yearly basis is have a HVAC Tech, "Clean & Tune" your system, which will involve pressure & leak checking, as well cleaning the Condenser & Evaporator coils, checking air flow etc.

    And, as long as the Evaporator coil isn't leaking down in your Air Handler/Duct work via that rust, you should be good.

    I will say, that after 20 years of usage,.... "If" You were concerned about Efficiency & Warranty, then it's time to upgrade to a new unit.
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  4. fitter30

    fitter30 Well-Known Member

    Feb 2, 2020
    Retired service tech
    Peace valley missouri
    Take a good look at the condensate pan for what shape it's in.
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