Is it safe to keep trying to start the furnace?

No, repeated tries can build up unburnt gas. Three failed cycles is the limit. Call us instead.

Can I clean the flame sensor myself?

Yes if you're comfortable, fine emery cloth, gentle wipe. But many sensors are within ohm-spec and the issue is something else, so a tech call usually pays off.

Limited Time: Waived diagnostic with approved repair◆🚨 NO-COST AC or Heater Tune-Up: no income requirements, just a PG&E bill, Call (559) 720-0479◆🚨 URGENT, NEW PROGRAM: FREE All-Electric Mini Split, $0 to qualifying households, limited funding, Call (559) 720-0479◆🔥 FREE replacement estimates◆❄️ FREE AC/HEATER TUNE UP◆🧾 FREE DIAGNOSTICS◆🌬️ FREE DUCT INSPECTIONS◆🧰 FREE NEW UNIT ESTIMATES◆📞 Call (559) 720-0479, Same-week service◆⚡ Schedule online · Honest, family-owned◆🛠️ Licensed · Insured · Family-owned◆ Limited Time: Waived diagnostic with approved repair◆🚨 NO-COST AC or Heater Tune-Up: no income requirements, just a PG&E bill, Call (559) 720-0479◆🚨 URGENT, NEW PROGRAM: FREE All-Electric Mini Split, $0 to qualifying households, limited funding, Call (559) 720-0479◆🔥 FREE replacement estimates◆❄️ FREE AC/HEATER TUNE UP◆🧾 FREE DIAGNOSTICS◆🌬️ FREE DUCT INSPECTIONS◆🧰 FREE NEW UNIT ESTIMATES◆📞 Call (559) 720-0479, Same-week service◆⚡ Schedule online · Honest, family-owned◆🛠️ Licensed · Insured · Family-owned◆

Family Owned And Operated Since 2009

All problems

UrgentHeating

Furnace Won't Ignite

Furnace clicks but won't fire, usually a $200 fix, not a $9,000 furnace.

Call (559) 720-0479

Symptoms you're seeing

Thermostat calls for heat, blower runs, but no warm air
Clicking or buzzing followed by lockout
Furnace tries 3 times, then shuts down for an hour
Yellow flame visible briefly then drops out

What's actually causing it

Most likelyDirty flame sensor, #1 cause, $200 fix

CommonCracked or worn hot surface ignitor

CommonClosed gas valve or low gas pressure

PossiblePressure switch fault from blocked vent

PossibleFailed control board

What to do right now

1Confirm the gas valve to the furnace is OPEN
2Check the thermostat is set to HEAT and the temp is above room temp
3Replace the air filter if dirty
4Look for blinking error codes on the furnace control board (count flashes)
5Don't keep resetting, repeated ignition attempts can flood the burners

When to call us

After 2–3 failed ignition cycles, stop and call. Most no-ignition calls are flame sensors or ignitors, fast, inexpensive fixes if diagnosed correctly.

Estimated cost

$185–$450 for flame sensor, ignitor, or pressure switch. Control board: $550–$900.

Call (559) 720-0479 Now