MY WIFE DROVE THE 2001 VOLVO S60 AND NOTICED A NOXIOUS BURNING SMELL AND IMMEDIATELY DROVE IT HOME. SHE THOUGHT IT WAS SOMETHING EXTREMELY WRONG WITH THE HEATER. I DROVE THE CAR 3 DAYS LATER AND AFTER 3 MINUTES NOTICED THE BURNING SMELL AS WELL. I TURNED OFF THE HEATER, AND THE SMELL CONTINUED. I SAW SOME SMOKE TO MY LEFT SIDE AND NOTICED THE SEAT HAD A HOLE THAT WAS MELTING AND BURNING. I TURNED OFF THE HEATED SEAT AND ENSURED THE SEAT DID NOT BURN FURTHER. *TR