What does Coleman code 7 Blinks mean?
Coleman furnace code 7 Blinks means the burners failed to establish flame and the furnace entered ignition lockout on the supported control family. Confirm the model number and diagnostic chart inside the furnace door before replacing parts.
What causes Coleman code 7 Blinks?
- No gas reaching the burners
- A failed hot-surface igniter
- A dirty or weak flame sensor
Can I troubleshoot Coleman code 7 Blinks?
- Confirm the thermostat is calling for heat and the gas shutoff has not been moved.
- Turn furnace power off for five minutes, restore it once, and note whether the same code returns.
How much does Coleman code 7 Blinks cost to fix?
A furnace ignitor replacement typically costs between $150 and $750 nationally.
When should I call a technician?
Call a licensed technician if ignition fails again after one reset or if you smell gas.
Sources and model scope
Fault codes vary by model and control board. Confirm the diagnostic chart inside your furnace panel or the official manual before acting.
Scope used here: Johnson Controls integrated furnace controls using the documented 1–12 red-flash table.
- Johnson Controls Unitary Products: Gas Furnace Installation Manual
272441-UIM-E-0513 · Johnson Controls integrated furnace controls with the 1–12 red-flash table in this manual; other model families may differ.
Compiled by Warmlo Editorial · Reviewed August 2026
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.