Amana Furnace Error Code Continuous Flashing

Continuous Flashing on an Amana furnace means the control board is detecting a flame signal when the gas valve is de-energized and there is no active call for heat. This is an abnormal condition because the flame sensor should only read a signal during an active, commanded heating cycle. The fault points to either a short in the flame sensor wiring, a faulty sensor rod, or a gas valve that is not closing fully after the heating cycle ends.

Yes, this fault code can indicate a genuine safety issue. If the root cause is a gas valve that is not closing completely, the burner may remain lit in an uncontrolled state, which poses a combustion and carbon monoxide risk. If you observe a flame that does not extinguish after the heating cycle ends, shut the furnace off and contact a qualified technician before operating it again.

Repair costs vary depending on the root cause. Correcting a wiring short or cleaning and reseating the flame sensor is relatively inexpensive, typically ranging from $75 to $200 for a service visit if no parts are needed. Replacing a gas valve is significantly more involved, with parts and labor costs often ranging from $300 to $600 or more depending on the technician and part availability.

Start by inspecting the flame sensor wiring for any bare spots or areas where the wire contacts grounded metal, and check the sensor rod and its ceramic insulator for damage or carbon buildup. If the wiring and sensor check out, observe the burner after a heating cycle ends to confirm the flame shuts off promptly. If the flame continues burning after the gas valve is de-energized, the gas valve itself needs to be replaced by a qualified technician.

A power reset may temporarily clear the error and allow the furnace to run again, but it will not fix the underlying problem. If the short in the wiring, the faulty sensor, or the failing gas valve is not repaired, the condition will return and the fault code will reappear. Resetting without diagnosis only delays addressing what could be a safety-related issue.