Born in Halle (Saale), Ehricht studied school music at the Hochschule für Musik Franz Liszt, Weimar from 1959 to 1963.
From 1969 to 1973, he studied composition with Johann Cilenšek [de] and Werner Hübschmann at the Weimar Academy of Music.
At the same time, he was Meisterschüler [de] for composition with Siegfried Matthus at the Academy of Arts, Berlin (East).
From 1988 to 2005, he was a lecturer in composition and ear training at the Hochschule für Musik und Theater Rostock.
From 1992 to 2002 he held the office of deputy chairman of the Mecklenburg-Vorpommern regional association of the Deutscher Komponistenverband [de].