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Bosch Refrigerator Error Code FILTER

The age of the water filter is close to the maximum lifetime; order a new filter (US version only).

Bosch codesBosch refrigerator codes

The age of the water filter is close to the maximum lifetime; order a new filter (US version only).

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What FILTER means on a Bosch refrigerator

The FILTER indicator on a Bosch refrigerator is a time-based maintenance alert built into the refrigerator's control system. It tracks the operational age of the installed water filter cartridge and activates when the filter is approaching the end of its recommended service life. This feature is present on US-market Bosch refrigerators that include an internal water filtration system for the ice maker and water dispenser.

The alert is not triggered by a sensor measuring actual water flow, pressure drop, or contamination levels. Instead, the control board uses an internal timer that counts the months since the last filter reset. Bosch recommends replacing the water filter every six months or when the indicator appears, whichever comes first. Heavy usage households or areas with high sediment or chloramine content in municipal water may benefit from even more frequent replacement.

When the FILTER message appears, the refrigerator continues to operate normally and water will still dispense. However, an aging filter cartridge may have reduced capacity to remove contaminants such as chlorine, lead, and particulates, which can affect water taste and quality. The correct response is to order a replacement filter cartridge compatible with your specific Bosch model, install it, and then perform the filter reset procedure on the control panel to clear the indicator and restart the internal timer.

Source: manufacturer service documentation.

Common causes of FILTER

  1. 01

    Filter approaching six-month service interval

    Part replacement

    The most common reason for this alert is simply that approximately six months have passed since the last filter installation or reset. The control board timer is functioning as designed.

  2. 02

    Filter reset not performed after previous replacement

    Wiring / connection

    If a filter was replaced but the reset procedure was not completed on the control panel, the timer continued counting from the previous installation date. Performing the reset after every filter change prevents this.

  3. 03

    High water usage accelerating filter depletion

    Part replacement

    Households with heavy use of the water dispenser and ice maker may exhaust filter capacity before the six-month timer expires. The alert in this case is timely even if it appears earlier than expected.

  4. 04

    Filter installed without completing reset procedure

    Wiring / connection

    A newly installed filter that was not followed by a control panel reset will cause the FILTER indicator to remain on or reappear quickly, because the system still references the old timer start date.

See the test procedure for each cause

Frequently asked questions about FILTER

What does FILTER mean on a Bosch refrigerator?
The FILTER indicator means the internal water filter cartridge is nearing the end of its recommended service life, which Bosch sets at approximately six months for US-market models. It is a maintenance reminder generated by the control board's internal timer, not a fault or malfunction. The refrigerator continues to operate normally when this message is displayed. You should order a replacement filter, install it, and reset the indicator using the control panel.
How do I fix the FILTER alert on my Bosch refrigerator?
To resolve the FILTER alert, replace the water filter cartridge with a compatible replacement for your Bosch model. After installing the new filter, locate the filter reset button or option on the control panel and hold it for the required number of seconds until the indicator clears. The exact reset procedure varies by model, so consult the label inside the refrigerator or the user guide for your specific unit. Skipping the reset after replacement will cause the indicator to remain on.
Is it safe to keep using my Bosch refrigerator when the FILTER alert is on?
Yes, the refrigerator itself is safe to use and will continue to dispense water and make ice normally when the FILTER indicator is active. However, an overdue filter cartridge may have reduced effectiveness at removing contaminants like chlorine, lead, and sediment from your water supply. For the best water quality, replace the filter as soon as practical after the indicator appears.
How much does it cost to replace a Bosch refrigerator water filter?
Replacement water filter cartridges for Bosch refrigerators typically range from about $30 to $60 per cartridge, depending on the model and whether you purchase an original or compatible third-party option. Since Bosch recommends replacement every six months, budgeting for two filters per year is a reasonable expectation. Installation is a simple tool-free process that most homeowners can complete themselves, so there is generally no additional labor cost.
Will resetting the filter indicator clear the FILTER message without replacing the cartridge?
Performing a reset without replacing the filter will clear the FILTER message and restart the internal timer, but it does not address the actual condition of the cartridge. An old, saturated filter that is simply reset will continue to degrade in performance, potentially allowing more contaminants to pass through into your drinking water and ice. Resetting without replacement is not recommended as a long-term solution. The reset function is intended to be used only after a new filter has been installed.

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