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Beoordeeld door Marcus AldridgeSenior Editorial Reviewer — Plumbing, HVAC & Wet Trades
Who to call · Fresno

Furnace blowing cold airFresno, California

When your furnace runs but only pushes cold or lukewarm air through the vents, the problem usually lies with the pilot light, flame sensor, gas valve, or a clogged air filter that triggers a safety shutdown. A certified HVAC technician can diagnose the root cause and restore heat, often in a single visit.

Who to call

For this problem in Fresno, call a: Klimaattechnicus

Vind een Klimaattechnicus in Fresno

Symptoms to look for

  • Furnace fan runs but only cold or lukewarm air comes from the vents
  • Furnace cycles on and off every few minutes without reaching the set temperature
  • Pilot light is out or flame sensor glows but burner does not ignite
  • Thermostat display shows the system is heating but rooms stay cold
  • Burning smell or clicking sound when the furnace starts up

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