Firefighters extinguished a small electrical fire in a block of flats in Horsham overnight on Friday (July 25).
Emergency services attended the flats at Parsonage Road at about 11.45pm.
The fire was located in the air conditioning unit outlet, on the exterior wall of the flats.
The electricity supply to the air conditioning unit was isolated by firefighters and the fire was extinguished.
The blaze was ruled accidental and fire crews left the scene at about 1.20am on Saturday (July 26).