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Error code reference

Maytag Washer Error Code F9

Low voltage detected; less than 90 volt AC (machine functional).

Maytag codesMaytag washer codes

Low voltage detected; less than 90 volt AC (machine functional).

First step from the service manual

Check installation to ensure proper power to washer.

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

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What F9 means on a Maytag washer

The F9 error code on a Maytag washer indicates that the control board has detected supply voltage below 90 volts AC. Under normal operating conditions, a residential washer requires a stable 120-volt AC supply. When incoming voltage drops below the 90-volt threshold, the control triggers this fault to alert the user, though the machine may still be functional at reduced capacity. This is a power supply-side issue, not an internal component failure.

The most common source of this fault is an inadequate or unstable electrical supply reaching the outlet or the washer itself. Causes include a partially tripped circuit breaker, a weak or failing outlet, an undersized or overly long extension cord, or shared circuits that drop voltage under load. In some cases, the issue originates at the utility level, particularly during periods of high demand or in older homes with aging wiring infrastructure.

Diagnosis should begin at the power source. Use a multimeter to measure the actual AC voltage at the outlet while the washer is running, since voltage can sag under load even if it reads correctly at idle. Confirm the washer is plugged directly into a properly grounded 120-volt, 60 Hz outlet on a dedicated circuit. If the outlet voltage is within spec and the fault persists, the control board's voltage sensing circuit may be suspect, though this is a less common cause.

Source: manufacturer service documentation.

Common causes of F9

  1. 01

    Partially tripped or weak circuit breaker

    Wiring / connection

    A breaker that has partially tripped can still pass some current but at reduced voltage. Reset the breaker fully by switching it off and back on, and check whether it holds under load.

  2. 02

    Faulty or degraded wall outlet

    Part replacement

    An outlet with worn contacts or a loose wiring connection can cause voltage to sag when the washer draws current. Test the outlet voltage with a multimeter while the washer is running to confirm.

  3. 03

    Use of extension cord or power strip

    Wiring / connection

    Extension cords and power strips are not rated for washer current draw and can cause significant voltage drop. The washer should be plugged directly into a dedicated wall outlet.

  4. 04

    Shared or overloaded circuit

    Wiring / connection

    If the washer shares a circuit with other high-draw appliances, voltage can drop when multiple devices are running simultaneously. A dedicated 15 or 20 amp circuit is recommended for washers.

  5. 05

    Low utility supply voltage

    Wiring / connection

    During peak demand periods or in areas with older electrical infrastructure, incoming utility voltage can drop below the minimum threshold. Contacting your utility provider or having an electrician measure incoming voltage at the panel can confirm this.

See the test procedure for each cause

Frequently asked questions about F9

What does F9 mean on a Maytag washer?
The F9 code on a Maytag washer means the control board has detected incoming AC voltage below 90 volts, which is below the minimum required for reliable operation. The washer may still run in this state, but performance can be degraded. This is a power supply issue, not an internal mechanical or electronic failure. Checking your outlet, circuit breaker, and wiring is the correct first step.
How do I fix the F9 error code on my Maytag washer?
Start by confirming the washer is plugged directly into a dedicated 120-volt wall outlet and not into an extension cord or power strip. Reset the circuit breaker by turning it fully off and back on. Use a multimeter to measure the outlet voltage while the washer is operating, since voltage can drop under load. If the outlet and breaker check out, consult an electrician to evaluate your home wiring or utility supply.
Is it safe to run my Maytag washer when it shows F9?
The F9 code indicates the machine is functional despite the low voltage condition, so running it briefly is generally not an immediate safety hazard. However, operating any motor-driven appliance at sustained low voltage can cause excessive heat buildup in the motor windings over time. It is best to resolve the underlying power supply issue before continuing regular use.
Will resetting my Maytag washer clear the F9 error?
Resetting the washer may temporarily clear the code, but the fault will return if the root cause, which is low incoming voltage, has not been corrected. A power cycle alone does not fix a weak outlet, a partial breaker trip, or low utility voltage. Address the electrical supply issue first, and the code should not return.
How much does it cost to repair a Maytag washer showing F9?
If the issue is a tripped breaker or an extension cord, the fix costs nothing. Replacing a faulty wall outlet typically costs between $75 and $150 including labor. If the problem requires dedicated circuit installation or electrical panel work, costs can range from $150 to $400 or more depending on the scope of work. If the washer control board itself is at fault, board replacement costs generally fall in the $150 to $350 range for parts and labor.

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