He made 17 league and cup appearances for the Shrimps this season, keeping clean sheets in the wins against Shrewsbury Town, Sheffield Wednesday and Newport County AFC.
With Motherwell keeper Trevor Carson joining the club on loan last week, an agreement has been reached for an early end to Andresson’s stay.
Robinson said: “Jokull heads back to Reading with our best wishes.
“He is a fine young goalkeeper and was a brilliant character around the dressing room.
“I am sure he will go on to have a fantastic career in football and myself and the rest of the club wish him the best of luck with whatever comes next.”
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