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Error code reference

Bosch Refrigerator Error Code dH

Home bar Door Switch defective

Bosch codesBosch refrigerator codes

Home bar Door Switch defective — senses door open for more than 1 hour.

First step from the service manual

Check if home bar door is actually opened or not.

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
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What dH means on a Bosch refrigerator

The dH error code on a Bosch refrigerator indicates that the home bar door switch has detected the home bar compartment door as open for more than one continuous hour. The home bar is a small interior compartment, typically accessible from outside the refrigerator, and it has a dedicated door switch that monitors its open or closed state. When this switch signals an open condition for longer than the one-hour threshold, the control board registers the fault and displays dH to alert the user or technician.

The door switch itself is an electromechanical component that opens or closes a circuit depending on the physical position of the home bar door. If the switch becomes defective, it can send a false signal to the control board indicating the door is open even when it is physically closed. This can result from a failed switch contact, a broken actuator on the switch body, wiring harness damage, or corrosion at the connector terminals.

The first step in any diagnosis is to physically inspect whether the home bar door is actually standing open. If the door is confirmed closed and the code persists, the switch itself should be tested for proper continuity and operation. A properly functioning switch will show a consistent change in circuit state as the door is opened and closed. If the switch fails to respond correctly, replacement of the door switch is the indicated repair.

Source: manufacturer service documentation.

Common causes of dH

  1. 01

    Home bar door left open

    Wiring / connection

    The most straightforward cause is the home bar door being physically left ajar or not fully latched. Check the door and press it firmly closed to see if the error clears.

  2. 02

    Defective door switch

    Part replacement

    The door switch itself may have failed internally, causing it to permanently signal an open state even when the door is closed. Testing the switch for proper continuity across its terminals will confirm this fault.

  3. 03

    Door switch actuator damage

    Part replacement

    The mechanical actuator or plunger on the switch can break or become worn, preventing the switch from registering that the door has been closed. Inspect the actuator for cracks or missing pieces.

  4. 04

    Wiring harness or connector fault

    Wiring / connection

    Damaged wiring or corroded connector terminals between the door switch and the control board can produce a false open-door signal. Inspect the harness for pinches, breaks, or corrosion at the connector.

  5. 05

    Misaligned door or worn gasket

    Wiring / connection

    If the home bar door is out of alignment, it may not depress the switch actuator fully when closed. Check the door hinges and gasket condition to ensure the door closes with proper pressure and alignment.

See the test procedure for each cause

Frequently asked questions about dH

What does dH mean on a Bosch refrigerator?
The dH code on a Bosch refrigerator means the home bar door switch has detected the home bar compartment door as open for more than one hour. This can be caused by the door actually being open, or by a faulty switch that incorrectly reports the door as open. The refrigerator triggers this alert to prevent temperature loss and compartment damage. Checking whether the door is physically open or closed is the first diagnostic step.
Can I fix the dH error myself without calling a technician?
If the home bar door was simply left open, closing it firmly may clear the error without any repair needed. If the door is closed and the code persists, a DIYer comfortable with basic appliance repair can inspect the door switch, check the wiring connector for corrosion, and test switch continuity with a multimeter. Replacing a faulty door switch is a straightforward repair, though if the wiring or control board is involved, a technician may be needed.
Is the dH error code on a Bosch refrigerator a safety concern?
The dH code is not a safety hazard in the way that a gas or electrical fault would be, but a home bar door that is genuinely open or a failing switch can cause the compartment to warm, potentially affecting food stored inside. Addressing the error promptly helps maintain proper temperatures and prevents the compressor from working harder than necessary to compensate for perceived heat gain.
How much does it cost to repair the dH error on a Bosch refrigerator?
If the repair involves only closing a door that was left open, there is no cost. If the home bar door switch needs replacement, parts typically range from around 15 to 50 dollars depending on the specific model, with labor costs adding roughly 75 to 150 dollars if a technician performs the work. Wiring repairs or control board involvement could increase the total cost significantly.
Will resetting the refrigerator clear the dH error code?
A power reset may temporarily clear the dH code from the display, but if the underlying cause is a defective switch or a door that remains open, the error will return once the one-hour threshold is reached again. A reset is not a fix for this fault. The root cause, whether a physically open door, a failed switch, or a wiring issue, must be identified and corrected for the code to stay cleared.

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