What this usually means
Odor character and duration matter. Dust on heating surfaces may produce a temporary smell after a long shutdown.
Electrical or fuel odors can indicate unsafe conditions. Do not keep operating the system while waiting to see whether a severe odor disappears.
What you can safely check
- Turn the system off for severe or persistent odors
- Do not open equipment panels
- Check smoke and carbon-monoxide alarms
- Leave the building and contact emergency services for suspected gas or combustion danger
When to call a professional
Request urgent professional help for smoke, sparking, electrical odor, fuel odor, alarm activation or symptoms of carbon-monoxide exposure.
Related next stepHeating safety serviceExplore this topic