A fire broke out in the thermal fluid boiler of a road material hot pre-coating facility. The firemen brought the fire under control within 1 hour and 30 minutes and watered the nearby tar tanks out of precaution. The cooling fluid used in the facility spilled into the buffer tank meant for the purpose. A short circuit in the electrical cabinet was the cause of the accident. An expert analysis was carried out on the boiler before re-commissioning.