Bosch Washer Error Code F31: How to Fix It

Medium 45-90 minutes High Severity Verified June 2026
Error Code
F31
Brand
Bosch
Product Type
washer
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
45-90 minutes
Bosch washer error code F31 indicates that the maximum water level has been exceeded and the drain pump has been automatically activated as a safety measure. This error typically occurs when water continues to enter the washer drum even when it shouldn't, often due to a faulty water inlet valve, clogged drain system, or malfunctioning control board.
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Tools You'll Need

How to Fix Error Code F31

  1. Safety First - Power Down

    Never work on electrical appliances while they're plugged in. Standing water can create electrical hazards.
  2. Check for Overfilling

  3. Inspect the Water Inlet Valve

    Turn off water supply valves before disconnecting any hoses to prevent flooding.
  4. Examine Water Supply Hoses

  5. Test the Drain System

  6. Inspect the Pressure Switch

    Handle the pressure switch and air tube carefully as they're delicate components.
  7. Reset and Test

    Stop the cycle immediately if water begins to overfill again.
  8. Replace Water Inlet Valve if Necessary

    If you're not comfortable working with water connections and electrical components, call a professional technician.

Parts You May Need

Water inlet valve
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Pressure switch
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Water supply hose screens
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Water inlet valve
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Pressure switch
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Water supply hose screens
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Water inlet valve
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Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
Water inlet valve
Check Price on Amazon
Pressure switch
Check Price on Amazon
Water supply hose screens
Check Price on Amazon
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When to Call a Professional

Call a professional technician if the water inlet valve replacement doesn't resolve the issue, if you're uncomfortable working with water and electrical connections, or if the control board appears to be malfunctioning. Also seek professional help if you notice any signs of water damage that could indicate internal component failure.

Frequently Asked Questions

What causes Bosch washer error code F31?
Error code F31 is caused by excessive water levels in the drum, typically due to a faulty water inlet valve that won't shut off, a malfunctioning pressure switch that can't detect proper water levels, or drainage issues that prevent proper water evacuation.
Is it safe to use my Bosch washer with F31 error?
No, you should not use the washer when F31 error appears. This error indicates a potential flooding situation that could damage your home and the appliance. The drain pump activates as a safety measure, but the underlying problem needs to be fixed first.
How much does it cost to fix a Bosch washer F31 error?
DIY repairs typically cost $50-150 for a new water inlet valve or pressure switch. Professional repair costs range from $200-400 depending on the part needed and labor rates in your area. The water inlet valve is the most commonly replaced component for this error.
Can a clogged drain cause F31 error on my Bosch washer?
Yes, a severely clogged drain can contribute to F31 error by preventing proper water evacuation, which can confuse the water level sensors and potentially cause backup into the drum. However, the most common cause is still a faulty water inlet valve.
How do I prevent F31 error from happening again?
Prevent F31 errors by regularly cleaning the drain hose and standpipe, replacing water supply hose screens every 2-3 years, ensuring proper installation of drain hoses, and addressing any water pressure issues in your home that could affect the inlet valve operation.