As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT BOTH BLEED AIR OVERHEAT LIGHT ILLUMINATED. CREW DIVERTED TO KDEN. DURING MAINTENANCE, LEFT ENGINE ANTI-ICE BYPASS VALVE WAS FOUND DEFECTIVE. VALVE WAS REPLACED IN ACCORDANCE TO AIRCRAFT MAINTENANCE MANUAL AND RETUNED TO SERVICE.