What does Daikin code 7 Flash mean?
Daikin furnace code 7 Flash means the control detected a low flame-sensor signal on the supported control family. Confirm the model number and diagnostic chart inside the furnace door before replacing parts.
What causes Daikin code 7 Flash?
- A dirty flame sensor
- Poor furnace grounding or reversed polarity
- Low gas pressure or an unstable burner flame
Can I troubleshoot Daikin code 7 Flash?
- Turn furnace power off and confirm its access panel is fully seated.
- Try one reset and note whether the burners light briefly before shutting off.
How much does Daikin code 7 Flash cost to fix?
A flame sensor cleaning or replacement typically costs between $100 and $400 nationally.
When should I call a technician?
Call a technician if flame drops out again; flame current and combustion should be measured.
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: DM80HS-style integrated controls using the documented 1–8 flash chart.
- Daikin Comfort Technologies: DM80HS Single-Stage Multi-Speed Gas Furnace — Product Specifications
SS-DM80HS · The 1–8 flash integrated-control family documented for DM80HS-series furnaces; sister-brand models must use the same control chart.
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.