🔥❄️ Furnace Blowing Cold Air? Here’s What It Usually Means ❄️🔥
🔥❄️ Furnace Blowing Cold Air? Here’s What It Usually Means ❄️🔥
If your furnace is running but the air coming from the vents feels cold (or only slightly warm), don’t ignore it. A furnace should blow consistently warm air after the first minute or two of startup. If it stays cold, the system may not be heating properly—or it may be shutting the heat off for safety.
At Uptown Heating & Air Conditioning, we diagnose the problem fast and get your heat back safe, strong, and steady.
⚠️ Common Signs
✔️ Air feels cold or lukewarm for long periods
✔️ Home temperature won’t rise to the set point
✔️ Furnace turns on/off repeatedly
✔️ You hear clicking/ignition attempts but no steady heat
✔️ Some rooms feel colder than others
⚠️ Most Common Causes
✔️ Thermostat set to FAN ON (blows air even when heat isn’t running)
✔️ Dirty/clogged air filter restricting airflow
✔️ Dirty flame sensor (burners won’t stay on)
✔️ Weak ignitor or ignition failure
✔️ Limit switch tripping from overheating/airflow restriction
✔️ Duct leaks pulling in attic/crawlspace air
✔️ Heat strips not working (electric furnaces)
✅ Quick Checks You Can Do (Safe)
Set thermostat to HEAT and FAN AUTO
Replace the air filter if it’s dirty
Make sure supply vents/returns aren’t blocked
If it still blows cold after that, it’s time for a professional diagnostic—continuing to reset it can cause lockouts and bigger repairs.
📅 Schedule your heating service today!
📍 Houston, Katy, Cypress, Spring, Tomball & surrounding areas
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