All 17 posts
Furnace Hums Then Goes Quiet? Three Capacitor Symptoms
Half a minute of hum and no air means the blower never started turning. What else makes that noise, and why the terminals stay live with the power off.
September 10, 2026
DIY Heating Fixes: The Six Checks That Are Safe
Thermostat, the furnace switch, the blower door, the filter, and the one power cycle that clears a lockout once. Then where to stop and call.
September 10, 2026
Electric or Gas Furnace: Which Costs Less to Run Here
Gas is usually cheaper to run in Pasadena, CA, but the gap is closing and a heat pump changes the math. How AFUE works and what decides it for your house.
September 10, 2026
Heater Vent Blowing Cold Air? Start With the Fan Setting
A burst of heat, then cold, then heat again is a clogged filter tripping the high-limit switch. Six checks in order, cheapest first.
September 10, 2026
Furnace Ignitor Failing? The Signs and What It Takes to Fix
A hot surface ignitor is a common no-heat cause and it usually warns you first. What the symptoms look like and why it is a licensed tech's part to change.
September 10, 2026
Furnace Warning Signs: Six That Mean Shut It Off Tonight
A yellow lifting flame, soot on the cabinet, a CO alarm. Then seven more that can wait for an appointment this week, and one that is normal in fall.
September 10, 2026
Gas vs Electric Heating Systems: The Short Version
A gas furnace vents exhaust up a flue; an electric one has none and turns nearly all its energy into heat. Why gas still usually costs less to run here.
September 10, 2026
Heater Blowing Cold Air? The Five Things It Usually Is
The fan set to On, a burner that never lit, leaky attic ducts, a heat pump in defrost, or an electric furnace. What to check before you call.
September 10, 2026
Heater Not Turning On? Eight Checks Before You Call
The blower door switch, the condensate drain on a high-efficiency furnace, and the one power cycle that clears a lockout. Plus what makes it worse.
September 10, 2026
Single Stage vs Two Stage Furnace: It's Not Efficiency
Two-stage runs a low fire most of the time. What that changes for even heat, noise and cycling, and whether it pays off in a short Pasadena winter.
September 10, 2026
Electric Furnace Not Heating? Power, Elements, or Airflow
Most units run two to five elements, and losing one drops output without killing the heat. What each symptom points to, and what is safe to check.
September 10, 2026
Heater Blowing Cold Air: The Usual Causes
The fan left on ON, a clogged filter tripping the limit switch, a pilot or igniter that is not lighting, or attic ducts losing the heat on the way.
September 10, 2026
Is a Floor Furnace Safe to Keep? Three Conditions
A grille hot enough to burn, a sound heat exchanger, and a vent that draws. What a service visit covers, and when a mini split replaces it instead.
September 9, 2026
Furnace Safety Inspection: The Nine Checks It Covers
Gas connections, burners, heat exchanger, combustion readings, venting, safeties. If a tech says the exchanger is cracked, ask for the photo.
September 9, 2026
Furnace Short Cycling? Start With the Dirty Filter
Restricted airflow overheats the exchanger and the limit switch cuts the burners. Then the flame sensor, the pressure switch, and a furnace a size too big.
September 9, 2026
Furnace Smells Burning the First Time On? Give It an Hour
Dust cooking off the heat exchanger fades within an hour of run time. Musty points at the coil or the ducts. Plastic or gas means stop, and here is how.
September 9, 2026
Wall Furnace Pilot Won't Stay Lit? Usually the Thermocouple
It holds while you press the button and dies when you let go. A dust-blocked pilot orifice and drafts in the wall cavity do the same. All small parts.
September 9, 2026Schedule service
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