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Error code reference

Bosch Refrigerator Error Code F37

Limit switch at bottom is switched on while the water bowl is being swung up (only appliances up to Eprom…

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Limit switch at bottom is switched on while the water bowl is being swung up (only appliances up to Eprom version 5.02).

First step from the service manual

Check limit switches for the water bowl.

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

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What F37 means on a Bosch refrigerator

The F37 error code on Bosch refrigerators applies specifically to appliances running EPROM firmware version 5.02 or earlier. It indicates that the bottom limit switch for the water bowl mechanism is registering an "on" or triggered state at a point in the cycle when it should not be active, specifically while the water bowl is in the process of swinging upward. The water bowl is part of the automatic defrost water evaporation system, which collects condensate and periodically repositions to facilitate evaporation. The control board monitors limit switches at both the top and bottom of the bowl's travel arc to confirm proper positioning throughout this motion.

The bottom limit switch is designed to confirm that the water bowl has reached or is resting at its lowest position. When the system commands the bowl to swing up, the bottom switch should disengage as the bowl lifts away from that position. If the control board detects that the bottom switch remains closed or sends a triggered signal while the bowl is mid-swing or at the top of its arc, F37 is triggered. This conflict in switch state signals points to either a faulty switch, a wiring short, a mechanical obstruction preventing the bowl from actually lifting, or a switch that is misaligned and making contact unintentionally.

Diagnosing F37 begins with a physical and electrical inspection of both limit switches for the water bowl assembly. Technicians should check that each switch moves freely, returns to its default position without sticking, and reads the expected open or closed state at the correct points in the bowl's range of motion. Wiring harness continuity between the switches and the control board should also be confirmed, as a short to ground in the bottom switch circuit can produce the same false-positive signal the error code describes.

Source: manufacturer service documentation.

Common causes of F37

  1. 01

    Faulty bottom limit switch

    Part replacement

    The bottom limit switch may be defective, stuck in the closed position, or worn out, causing it to send a false triggered signal even when the water bowl has lifted away from it. Testing the switch with a multimeter will reveal if it fails to open when the bowl moves upward.

  2. 02

    Mechanical obstruction blocking bowl movement

    Wiring / connection

    Ice buildup, debris, or a misaligned component can physically prevent the water bowl from swinging up fully, leaving it in contact with the bottom limit switch. A visual inspection of the bowl's range of motion and the surrounding area will help identify any blockage.

  3. 03

    Misaligned limit switch

    Wiring / connection

    If the bottom limit switch has shifted out of its correct mounting position, it may make contact with the bowl or its actuator arm even when the bowl is mid-swing or at the top of its arc. Checking the switch bracket and repositioning it can resolve this without replacing the part.

  4. 04

    Wiring short in the limit switch circuit

    Wiring / connection

    A short to ground or a pinched wire in the harness connecting the bottom limit switch to the control board can simulate a continuously closed switch signal. Inspecting the harness routing and checking continuity at the connector terminals will help identify this fault.

  5. 05

    Failed or corrupted control board

    Part replacement

    If the limit switches and wiring both test correctly, the control board itself may be misreading the switch input signals. This is less common but should be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about F37

What does F37 mean on a Bosch refrigerator?
F37 indicates that the bottom limit switch for the water bowl is registering as triggered while the bowl is in the process of swinging upward, which is a state conflict the control board flags as a fault. This error only applies to Bosch refrigerators running EPROM firmware version 5.02 or earlier. It points to a problem with the water bowl positioning system, which is part of the defrost condensate evaporation mechanism. The most likely causes include a stuck or faulty limit switch, a wiring issue, or a mechanical obstruction.
Can I fix F37 on my Bosch refrigerator myself?
Some causes of F37 are accessible to a knowledgeable DIYer, such as clearing a mechanical obstruction around the water bowl or inspecting visible wiring for damage. Testing the limit switches with a multimeter requires basic electrical knowledge but is straightforward. Replacing a limit switch or control board involves working near electrical components and refrigerant-related parts, so those steps are better handled by a qualified technician if you are not comfortable with appliance repair.
Is F37 on a Bosch refrigerator a safety concern?
F37 does not indicate a direct safety hazard such as a fire or refrigerant leak risk. However, if the water bowl system is not functioning correctly, the defrost condensate may not evaporate properly, which can lead to water pooling inside or around the refrigerator over time. Addressing the error promptly helps prevent potential water damage and ensures the defrost system operates as intended.
Will resetting my Bosch refrigerator clear the F37 error?
A power reset may temporarily clear the F37 code from the display, but if the underlying cause is not corrected, the error will return once the water bowl system attempts to cycle again. Resetting without diagnosing the root cause is not a reliable fix. The limit switches and bowl mechanism should be inspected and tested to confirm they are functioning correctly before considering the issue resolved.
How much does it cost to repair a Bosch refrigerator F37 error?
Repair costs depend on what component is at fault. If the fix is simply clearing an obstruction or realigning a switch, the cost may only involve a service call fee, typically in the range of $75 to $150. Replacing a limit switch is generally an inexpensive part, though labor adds to the total, bringing most switch replacements to a range of $100 to $250. If the control board requires replacement, costs can range from $200 to $500 or more depending on parts availability and labor rates in your area.

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