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Error code reference

Amana Dryer Error Code F:31

Low voltage condition (less than 30V) detected (appears ONLY in Diagnostic Test Mode).

Amana codesAmana dryer codes

Low voltage condition (less than 30V) detected (appears ONLY in Diagnostic Test Mode).

First step from the service manual

Check to see if a household fuse has blown or a circuit breaker has tripped. Confirm the power cord is properly installed and plugged into the power outlet. Check the relay connections on the electronic control.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F:31 means on a Amana dryer

The F:31 error code on an Amana dryer indicates that the electronic control has detected a low voltage condition, specifically a supply voltage below 30 volts. This code is only triggered and visible during the Diagnostic Test Mode, meaning it will not appear during normal operation. The control board continuously monitors incoming power during diagnostics, and when the supply voltage falls beneath the minimum threshold required for safe and correct operation, the F:31 code is logged to alert a technician to a power delivery problem.

The most common source of this condition is a blown household fuse or a tripped circuit breaker. Electric dryers typically require a 240-volt, dual-leg circuit, with each leg protected by a separate fuse or breaker. If one leg of that circuit fails, the dryer may receive only 120 volts or less to certain components, which can trigger a low voltage fault during diagnostics. A partial power loss of this type can also cause the dryer to run the motor but produce no heat, or behave erratically.

Beyond the household panel, the issue can stem from an improperly installed or loosely seated power cord, where a poorly connected terminal at the terminal block reduces the effective voltage reaching the control circuit. Additionally, the relay connections on the electronic control board itself should be inspected, as corroded, loose, or damaged relay contacts can cause voltage drops that register as a low voltage fault during the diagnostic sequence.

Source: manufacturer service documentation.

Common causes of F:31

  1. 01

    Blown household fuse or tripped circuit breaker

    Wiring / connection

    Electric dryers use a two-leg 240-volt circuit, and if one leg loses power due to a blown fuse or tripped breaker, the voltage reaching the control can drop below the 30-volt threshold. Check the panel for a tripped breaker or blown fuse and reset or replace as needed.

  2. 02

    Loose or improperly installed power cord

    Wiring / connection

    A power cord that is not fully plugged into the outlet or has a loose terminal connection at the dryer terminal block can result in reduced voltage reaching the electronic control. Inspect the outlet connection and the terminal block wiring for loose or poorly seated terminals.

  3. 03

    Faulty or corroded relay connections on the control board

    Part replacement

    The electronic control board uses relay contacts to distribute power within the dryer, and corroded or damaged relay connections can cause a voltage drop that registers as a low voltage fault during diagnostics. Visually inspect the relay connections on the board for signs of corrosion, burning, or looseness.

  4. 04

    Faulty wall outlet or wiring

    Wiring / connection

    A deteriorated or wired-incorrectly 240-volt outlet can supply insufficient voltage to the dryer even when the breaker appears functional. Use a multimeter at the outlet to confirm both legs are delivering correct voltage before assuming the dryer itself is the problem.

  5. 05

    Failed electronic control board

    Part replacement

    If the power supply, cord, outlet, and relay connections all check out correctly, the control board itself may have internal damage causing it to misread or fail to process incoming voltage. A failed control board would require replacement to resolve the fault.

See the test procedure for each cause

Frequently asked questions about F:31

What does F:31 mean on a Amana dryer?
The F:31 code on an Amana dryer means the electronic control detected a low voltage condition, specifically a supply voltage below 30 volts. This code only appears during Diagnostic Test Mode, not during normal operation. It points to a problem with the power supply reaching the dryer, such as a tripped breaker, blown fuse, or a loose power cord connection.
How do I fix the F:31 error on my Amana dryer?
Start by checking your home's electrical panel for a tripped circuit breaker or blown fuse and restore power if needed. Next, confirm the dryer's power cord is fully plugged into the outlet and that the cord terminals are securely connected at the dryer's terminal block. If power supply checks out, inspect the relay connections on the electronic control board for corrosion or looseness. If those steps do not resolve the issue, the control board itself may need to be replaced.
Is it safe to use my Amana dryer when it shows F:31?
It is not advisable to continue using the dryer until the underlying power issue is resolved. A low voltage condition can cause the dryer to operate incorrectly, overheat certain components, or fail to function safely. The F:31 code only appears in Diagnostic Test Mode, so have the power supply inspected and corrected before returning the dryer to regular use.
Will resetting my Amana dryer clear the F:31 code?
Simply resetting the dryer by unplugging it and plugging it back in will not permanently clear the F:31 code if the root cause has not been corrected. The code will return the next time Diagnostic Test Mode is run if the voltage condition is still present. The underlying electrical issue must be identified and fixed first.
How much does it cost to repair an Amana dryer with an F:31 error?
The cost depends on the cause of the fault. If only a tripped breaker needs to be reset or a household fuse replaced, the cost is minimal, typically a few dollars for a fuse. If the power cord needs replacement or reseating, parts and labor can range from around $20 to $80. A control board replacement, if required, can range from $150 to $350 or more depending on parts and labor costs in your area.

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