Virg464
Well-Known Member
With the drain working and the system blowing very cold air and making the HVAC plenum icy cold, it sounds like the expansion valve has failed and its freezing up the evap core. I've seen them turn into blocks of ice because the valve failed, no regulating and it just freezes right up. Just hope he can get it "fixed" correctly.Yes they use an expansion valve... Flow all the time is normal, It regulates/restricts flow to reduce evaporator pressure/temperature... To much flow would raise the pressure & therefore the temperature....
He shows a picture of the condensate drain & states that it is working...