Hi the sticky cork tape is used to seal around awkward shaped pipes, fittings and any openings where cold air can escape or warm humid air can condense onto. Basically it is a very pliable Insulation material widely use in the commercial refrigeration world.
The only thing I can think is that the evaporator is freezing up and stopping the condensate water getting to the drain outlet, if this is the case then incorrect gas charge or expansion valve would cause icing, the air con evaporator operating correctly shouldn’t really ice up.
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