Furnace Not Heating?

Leave the building, avoid switches or ignition sources, and contact the gas utility or emergency services from a safe location. Do not use the website form for a suspected gas emergency.

Repeated failures, a major repair, parts availability, poor comfort, and overall equipment condition can justify comparing both options. Age alone does not determine the answer.

First distinguish cold airflow, little airflow and heat that starts then stops. Check Heat mode, the fan setting and an accessible filter according to the equipment instructions. Persistent no heat needs diagnosis; do not bypass safety controls or repeatedly reset breakers. Read the detailed furnace guide below. For a suspected gas leak or carbon monoxide alarm, leave and contact emergency services from a safe location.

A central heater may not start because of thermostat settings, lost power, a protective delay or an equipment or safety-control fault. Check only the thermostat's normal user settings and accessible filter or grille conditions. Report whether nothing starts, air blows cold or heat stops, and whether the system is a furnace or heat pump. An unresolved problem needs professional diagnosis; the detailed no-start guide below explains the next steps.

If your furnace will not start, it may be because the thermostat is not requesting heat, power is unavailable, the system is in a protective delay, or an equipment/safety-control fault has interrupted startup. Start with Heat mode, a setpoint above room temperature and any schedule or away setting. Follow your thermostat manual for user-replaceable batteries and normal startup timing. Notice which symptom applies: a blank thermostat, a silent furnace, equipment running without warm air, or heat that starts then stops. These conditions need different checks; none proves that a thermostat, igniter or motor has failed. Inspect only an accessible filter and clear grilles as the equipment instructions allow. Leave panels secured. Do not touch wiring, relight burners, bypass safety switches or repeatedly reset breakers. If it still will not start, request diagnosis and report your observations. For a gas odor or CO alarm, leave and contact emergency services from a safe location instead of waiting for an appointment. Read Heco's detailed no-start guide or call (916) 813-2766. The $49 repair service fee applies to first-time customers only; repair charges are separate.

If the heater is not working in your house, first identify whether your home uses a furnace or heat pump, then describe the problem: nothing starts, air blows but feels cool, heat stops repeatedly, or some rooms stay cold. “Not working” does not identify a particular failed part. A working fan or a Heat symbol on the thermostat does not by itself confirm that the home is receiving heat. Check the thermostat's normal user settings and schedule. Follow the system instructions for accessible filter inspection and keep return/supply grilles clear. Avoid opening equipment, adjusting wiring or refrigerant, forcing a defrost cycle or defeating safety controls. If the system cannot maintain the requested temperature, remains unresponsive or repeatedly stops, arrange a professional evaluation. When contacting Heco, include your city/ZIP, equipment type if known, thermostat message and when the problem started. Mention any urgent occupant needs so availability can be reviewed; a request does not confirm an appointment. For a gas odor or CO alarm, leave and contact emergency services from a safe location. Call (916) 813-2766, daily 8 AM–7 PM. The $49 repair service fee is for first-time customers only; repairs are charged separately after approval.