Sleaford firefighters were called out to an incident in a commercial premises in the town centre yesterday (Tuesday) evening.
A firecrew attended the business in Market Place at about 5.44pm where there was a report of a boiler on fire.
They reported damage by the fire to electrical wiring within boiler, floorboards and a ceiling joist.
They put it out using an extinguisher.
A defect in the boiler was blamed for the fire, but there were no casualties.