Furnace Blowing Cold Air
Here's what typically causes this, and why an on-site diagnostic — not a phone guess — is what gets you an accurate estimate.
Ignition Failure
Burners not lighting, so only the blower runs.
Thermostat Set to Fan
Fan running independent of heat call.
Overheating Shutdown
Safety limit switch stopping the heating cycle.
Why diagnosis matters: A symptom like this can trace back to several different root causes, and the fix — and its cost — depends entirely on which one it is. Roxly doesn't quote a repair price over the phone based on a symptom alone: a technician inspects the equipment on site, tests the likely components, and confirms the actual cause before giving you a firm estimate. That's what makes the quote accurate instead of a guess you find out is wrong after the work starts.
Is this the same as "not heating at all"?
Related, but a system blowing cold specifically often points to an ignition or safety-limit issue rather than a total system failure.
Is this urgent in winter?
Yes — loss of heat during cold weather is treated as a priority call.