Winter in the Central Valley might not mean blizzards, but those January nights drop into the 30s. The worst time to discover your furnace is broken is the first night you really need it.
1. Unusual Noises
If you hear banging, rattling, squealing, or whining coming from your furnace, call a professional. These sounds often indicate loose parts, worn-out belts, or ignition issues that need immediate attention.
2. Yellow Burner Flame
Your furnace flame should be a crisp blue. If the flame is yellow or orange, it means the gas isn’t burning completely. This is a severe safety hazard as it can indicate the production of carbon monoxide.
3. Weak Airflow
If the air coming out of your vents feels like a weak breeze, you could have a failing blower motor or a severe blockage in your ductwork.
4. Frequent Cycling
If your furnace turns on and off constantly (short cycling), it could be a clogged filter, a malfunctioning thermostat, or a sign that the unit is overheating and shutting down as a safety measure.
5. Unexplained Energy Bill Spikes
If your gas or electric bill suddenly shoots up, but your usage hasn’t changed, your furnace is likely losing efficiency and straining to heat your home.