Short answer
No-heat calls often involve ignition, airflow, thermostats, or safety switches. Do not bypass safety devices. Describe what you hear and see so we can prepare.
Furnaces and heat pumps
Different systems fail in different ways. Furnaces may lock out after failed ignition. Heat pumps may struggle in extreme cold or need defrost-cycle checks.
Carbon monoxide awareness
Working smoke and CO detectors matter in any home with combustion equipment. If detectors alarm, follow the device instructions and get fresh air.
Before peak cold
A fall tune-up is one of the simplest ways to reduce emergency no-heat visits during cold snaps.
Safety note
If a carbon monoxide alarm sounds, leave the home and follow emergency guidance before requesting service.