What Are Common Reasons My Heater Is Not Working in My House?

Common heater failures usually come down to airflow, ignition, or control issues. In the San Diego area, we often see clogged filters, ignition or pilot light problems, and wiring faults that stop heat.

Quick checks:

• Dirty or clogged air filter reduces airflow and can shut the system down.
• Ignition switch or pilot light failure prevents burners from lighting.
• Faulty wiring or controls interrupt power to the heater.
• Dirty coils or components cause poor performance or safety lockouts.
• A carbon monoxide alarm or safety lockout will disable the system.

<br/> Updated: 2025-12-18 00:00:00 <br/>

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