The Persian compound reading (sam, "fire," plus andar, "inside") most Persian lexicographers now treat as a later back-formation from the Greek word rather than its source, and the standard modern authority on Greek etymology, Beekes, classifies salamandra itself as Pre-Greek, meaning no successful Indo-European derivation for the word has been established.
What would resolve this Either a securely attested Pre-Greek Aegean word the name can be shown to derive from, or new philological evidence settling the direction of borrowing between Greek and Persian rather than leaving it a rejected folk etymology on the Persian side.
OpenHistorical and comparative Indo-European linguistics, Pre-Greek substrate studies, Iranian philologyRobert S. P. Beekes, with Lucien van Beek, Etymological Dictionary of Greek