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Error code reference

Bosch Refrigerator Error Code 3-2-5

Ice maker

Bosch codesBosch refrigerator codes

Ice maker: Icemaker inlet water heater problem.

First step from the service manual

Check resistance of inlet water heater (US: 7kOhm, EU: 33kOhm); if OK replace ice maker.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What 3-2-5 means on a Bosch refrigerator

Error code 3-2-5 on a Bosch refrigerator indicates a problem with the ice maker inlet water heater. This small resistive heating element is located at the water inlet of the ice maker assembly. Its job is to prevent ice from forming at the inlet valve or water fill tube during the ice-making cycle, ensuring consistent water flow into the ice mold. The control board monitors this heater's electrical circuit and triggers code 3-2-5 when it detects a fault, either an open circuit, a short, or a resistance value outside the acceptable range.

The primary diagnostic step is to measure the resistance of the inlet water heater using a multimeter. For US-market units, the correct resistance is 7 kOhm. For EU-market units, the correct resistance is 33 kOhm. A reading that is significantly higher, lower, or reads as open line (OL) confirms the heater element has failed and needs replacement. If the resistance measures within the correct specification, the heater itself is not the problem and the ice maker assembly should be replaced as a complete unit, since the fault likely lies in the internal wiring or control circuitry within the assembly.

Common root causes include a burned-out heater element, damaged wiring harness connections at the heater, or corrosion on the connector terminals. In some cases, a failed ice maker control board within the assembly can misread the heater circuit even when the element is functional. Because the diagnostic flow points directly to replacing the entire ice maker if the heater resistance checks out, technicians should confirm both the resistance value and connector integrity before ordering parts.

Source: manufacturer service documentation.

Common causes of 3-2-5

  1. 01

    Failed inlet water heater element

    Part replacement

    The resistive heater element has burned out or broken internally, causing an open circuit or incorrect resistance reading. This is confirmed by measuring resistance at the heater: US units should read 7 kOhm and EU units should read 33 kOhm. Any significant deviation indicates a failed element.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wiring connecting the inlet water heater to the ice maker control circuit can become pinched, corroded, or disconnected over time. Inspect the connector pins and wire insulation near the heater for visible damage or looseness before replacing parts.

  3. 03

    Corroded connector terminals

    Wiring / connection

    Moisture inside the freezer compartment can cause oxidation on the heater connector terminals, increasing resistance in the circuit and triggering the fault code. Cleaning the terminals may restore the connection, though severely corroded connectors will need replacement.

  4. 04

    Ice maker assembly internal fault

    Part replacement

    If the inlet water heater resistance measures correctly but the code persists, the fault lies within the ice maker assembly itself, either in the internal control board or internal wiring. In this case, the entire ice maker assembly requires replacement.

See the test procedure for each cause

Frequently asked questions about 3-2-5

What does 3-2-5 mean on a Bosch refrigerator?
Error code 3-2-5 indicates a problem with the ice maker inlet water heater. This component is a small resistive heater that prevents water from freezing at the inlet before it reaches the ice mold. The refrigerator's control system has detected that the heater circuit is not operating within the expected parameters. Diagnosing this code starts with measuring the heater's resistance, which should be 7 kOhm on US models or 33 kOhm on EU models.
Can I fix error code 3-2-5 myself on a Bosch refrigerator?
A knowledgeable DIYer with a multimeter can perform the initial resistance check on the inlet water heater to determine whether the element has failed. If the heater resistance is out of spec, replacing the inlet water heater or the ice maker assembly is the required fix. However, working inside the freezer compartment and handling electrical components does require comfort with appliance repair, and if you are unsure, calling a qualified technician is the safer choice.
Is it safe to keep using my refrigerator while error code 3-2-5 is active?
The refrigerator's cooling and food preservation functions are generally not affected by this error code, since it is specific to the ice maker inlet water heater circuit. You can typically continue using the refrigerator for food storage while the issue is being diagnosed or parts are sourced. However, the ice maker may not produce ice reliably until the fault is resolved.
How much does it cost to repair error code 3-2-5 on a Bosch refrigerator?
Repair costs depend on whether only the inlet water heater needs replacement or the entire ice maker assembly is required. Parts costs for a replacement ice maker assembly typically range from around 80 to 250 dollars depending on the model. If professional labor is involved, total repair costs including parts and service time often fall in the range of 150 to 400 dollars.
Will resetting my Bosch refrigerator clear error code 3-2-5?
A reset may temporarily clear the code from the display, but the error will return if the underlying fault with the inlet water heater circuit has not been repaired. The control board will detect the heater problem again during the next ice-making cycle and reactivate the code. A proper repair, either replacing the faulty heater or the ice maker assembly, is necessary to permanently resolve the fault.

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