Firefighters were called to a house in Sidmouth on Sunday morning.
They were called to the address at Arcot Park, Sidmouth, at 11am.
A spokesman said: "Fire Control received a call from an alarm receiving company stating that a smoke alarm was sounding at a property.
"A fire appliance from Sidmouth was mobilised to investigate. Crews found there had been a small fire involving an electric heater which was out.
"Crews gave fire safety advice and ensured electrical appliance was safe."
