What does Amana code E3 mean?
Amana furnace code E3 means the high-limit switch opened on the supported control family. Confirm the model number and diagnostic chart inside the furnace door before replacing parts.
What causes Amana code E3?
- A dirty or overly restrictive air filter
- Closed or blocked supply and return vents
- A blower, limit switch, or airflow problem
Can I troubleshoot Amana code E3?
- Turn the furnace off and replace a dirty filter with the size and type specified for the system.
- Open all supply registers and make sure return grilles are not blocked before trying one reset.
How much does Amana code E3 cost to fix?
A limit switch replacement typically costs between $150 and $750 nationally.
When should I call a technician?
Call a technician if the limit code returns; repeated overheating can damage the furnace.
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: AR9S/GR9S and matching Daikin DR-series single-stage controls that display this E-code.
- Goodman Manufacturing: Service and Troubleshooting
RS6621301 · Goodman/Amana AR9S and GR9S, and Daikin DR-series single-stage furnace controls; use only for the E-code entries explicitly listed in the manual.
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.