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Error code reference

Amana Washer Error Code bP

Pressure switch fill error

Amana codesAmana washer codes

Pressure switch fill error — washtub took more than 59 minutes to fill or pressure switch contacts are not in expected state.

First step from the service manual

Spin out any water in the washtub (may need to unplug washer for 10 seconds to clear code), then check that pressure switch contacts are all closed.

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

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What bP means on a Amana washer

The bP error code on an Amana washer indicates a pressure switch fill error. This means the washtub either took longer than 59 minutes to reach the target water level, or the pressure switch contacts were not found in the expected state during the fill cycle. The pressure switch is a sensor that monitors water level inside the tub by detecting air pressure changes through a small hose connected to the tub. When the control board does not receive confirmation from the pressure switch that the correct water level has been reached within the allowed time window, it triggers the bP code and halts the cycle.

The pressure switch contacts are expected to be in a closed state under normal operating conditions. If one or more contacts are open when they should be closed, the control board interprets this as a fill problem even if water is actually present in the tub. This can result from a faulty pressure switch, a kinked or disconnected pressure hose, or a wiring issue between the switch and the control board. Additionally, actual fill problems such as low household water pressure, a clogged inlet screen, or a failed water inlet valve can prevent the tub from filling fast enough to satisfy the 59-minute threshold.

The recommended first diagnostic step is to spin out any water remaining in the washtub, which may require unplugging the washer for 10 seconds to clear the code and allow the machine to reset. After clearing the code, the pressure switch contacts should all be confirmed to be in the closed position. This helps isolate whether the root cause is an electrical or sensing issue with the pressure switch itself, or an actual water supply and fill rate problem.

Source: manufacturer service documentation.

Common causes of bP

  1. 01

    Low or restricted water supply

    Wiring / connection

    If household water pressure is too low or the inlet hose screens are clogged with sediment, the tub will fill too slowly and exceed the 59-minute limit. Check that both hot and cold supply valves are fully open and inspect the inlet screens for debris.

  2. 02

    Faulty or stuck pressure switch

    Part replacement

    The pressure switch monitors water level and must have all contacts in the closed position. A defective switch may not register the correct water level or may have contacts stuck in the open position, triggering the bP code regardless of actual water level.

  3. 03

    Kinked or disconnected pressure switch hose

    Wiring / connection

    The pressure switch relies on a small air hose connected to the tub to sense water level. If this hose is kinked, cracked, or has come loose, the switch will not receive accurate pressure readings and may report an incorrect fill status.

  4. 04

    Failed water inlet valve

    Part replacement

    The water inlet valve controls water flow into the tub. If one or both solenoids in the valve have failed, water flow will be reduced or absent, preventing the tub from filling within the allotted time.

  5. 05

    Wiring or connection issue at the pressure switch

    Wiring / connection

    Loose, corroded, or damaged wiring between the pressure switch and the control board can cause the board to read the contacts as open even when the switch itself is functioning correctly. Inspect the connector and wire harness at the switch for any damage.

See the test procedure for each cause

Frequently asked questions about bP

What does bP mean on a Amana washer?
The bP code on an Amana washer indicates a pressure switch fill error. It means the washtub took more than 59 minutes to fill, or the pressure switch contacts were not found in the expected closed state. The washer stops the cycle to prevent damage from an incomplete fill. Checking both the water supply and the pressure switch is the recommended starting point.
Will resetting my Amana washer clear the bP code?
Unplugging the washer for 10 seconds can clear the bP code and allow the machine to restart. However, if the underlying cause such as a supply issue or faulty pressure switch is not resolved, the code will return during the next fill cycle. A reset is a useful first step for diagnosis, not a permanent fix.
Can I fix the bP error myself without a technician?
Many of the common causes behind the bP code are accessible to a knowledgeable DIYer. Checking that supply valves are fully open, cleaning inlet screen filters, inspecting the pressure hose for kinks, and examining wiring connections at the pressure switch are all tasks that can be done without specialized tools. If the pressure switch or inlet valve needs replacement, those repairs are also straightforward for someone comfortable working on appliances.
Is it safe to keep using my Amana washer when the bP code is showing?
The washer will stop its cycle when the bP code appears, so it will not continue operating normally. It is best not to attempt to force a cycle through while the error is active. If there is water sitting in the tub, running a spin cycle after unplugging and replugging the washer can help drain it so you can safely inspect the machine.
How much does it cost to repair a bP error on an Amana washer?
Repair costs depend on the root cause. Cleaning inlet screens or adjusting supply valves costs nothing beyond your time. A replacement pressure switch or water inlet valve typically runs between $20 and $80 for the part alone, depending on the model. If a technician is needed, expect to add $100 to $200 or more in labor costs on top of any parts.

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