F3T3 in plain terms
F3T3 means there may be a problem with the hood temperature thermistor or its associated wiring. On units mounted above a cooktop, this thermistor watches the heat rising from below, and on many units it lets the vent fan start when needed. With F3T3 showing, that protection may not work, so run the vent fan by hand while cooking and have the thermistor tested if F3T3 returns.
Error codes
Reference| Code | Meaning |
|---|---|
| F3T3 | There may be a problem with the Hood Temperature Thermistor or the associated wiring. |
What you see with F3T3
- A vent fan that no longer starts by itself — The automatic protection has lost its heat reading.
- A vent fan that starts with the cooktop cold — A thermistor reporting heat that is not there.
- F3T3 during or after cooktop use — The fault showing up as heat rises from below.
- F3T3 at power-up with everything cold — A thermistor or wiring fault present at any temperature.
Causes of F3T3, ranked
- The hood temperature thermistor — First: the documentation names it, and it sits where the cooktop's heat and grease rise.
- Its connector — Second: heat and grease from below age the connection over the years.
- The wiring to the control — Third: insulation aged by heat, or a lead disturbed when the unit was installed or last repaired.
- A one-off misread — Last: a code that clears with a reset and does not return.
What to check first for F3T3
- Note the cooktop's state — Record whether it was in use, and how hard, when F3T3 appeared.
- Reset with the power off — Clears a passing fault.
- Test the vent fan by hand — Confirms the fan itself runs, which separates the fan from the thermistor.
- Have the thermistor and wiring tested — A technician reaches them by opening the unit safely.
What an owner can safely do about F3T3
- Run the vent fan by hand — Whenever the cooktop is in use, switch the vent fan on until the repair is done.
- Clean the grease filters — Wash them as the manual describes and let them dry before refitting; clean filters keep heat and grease moving away.
Tools: owner's manual, mild detergentAbout 15 min
- Reset the unit — Unplug it or switch off its breaker for a minute, then restore power.
Tools: breaker panel accessAbout 3 min
- Keep high heat below attended — Until the repair, keep long spells of high heat below to a minimum and never leave them unattended.
Safety before you start
Safety
Unplug the unit or switch off its breaker before cleaning or removing anything; a capacitor can hold a charge after the power is off. If the unit can microwave, never remove its outer cabinet: the high-voltage capacitor inside can hold a lethal charge after unplugging. With a gas cooktop below, if you smell gas, do not switch anything on or off, leave the building, and call the gas utility or emergency services from outside.
When to book a service call for F3T3
Call if F3T3 returns after a reset, if the vent fan starts with the cooktop cold, or if it never starts on its own any more. Until the repair, the unit has lost part of its protection against cooktop heat, so book soon if you cook below it often; the technician tests the thermistor and its wiring before replacing either.
Nearby Amana oven codes
What this reading does not cover
This reading of F3T3 applies to Amana units whose control reports the hood temperature thermistor or its wiring with this code, as the table states, which are units mounted above a cooktop. Automatic fan behaviour differs by model, and a model-specific page, where one exists, is the better guide. None is listed for F3T3 yet; start at the Amana oven code index below.
All Amana oven codes
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Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
