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Appliance Fix Guide

Bosch Dishwasher error code

Bosch Dishwasher Error E27

Low voltage in the power supply.

Low voltage in the power supply.

Updated Aug 18, 2026
Diagnose before buying a part
Bosch dishwasher repair guide for error E27
Error codeE27Dishwasher

Try these first

Start here before buying a part or taking the appliance apart.

  1. 1
    Check 1

    Reset Power: Turn off the dishwasher at the circuit breaker for 30 seconds and then turn it back on.

  2. 2
    Check 2

    Check Voltage: If the error persists, it indicates a power supply issue. Contact an electrician to check the incoming voltage to the appliance.

  3. 3
    Check 3

    Inspect Control Board: For advanced users, unplug the dishwasher and inspect the control board for any visible signs of corrosion or damage.

A quick explanation

What does E27 mean?

Low voltage in the power supply.

The answer you came for

How to fix Bosch dishwasher error E27

Start with the safest checks and work from simple to technical.

  1. 1

    Step 1

    1. Locate your home's main electrical panel and check if the circuit breaker dedicated to the dishwasher has tripped. If it is in the middle or off position, flip it fully off and then back on to reset it.

  2. 2

    Step 2

    2. Ensure the dishwasher's power cord is pushed all the way into the wall outlet. Sometimes vibrations can cause it to become loose.

  3. 3

    Step 3

    3. Examine the entire length of the power cord for any visible signs of damage, such as cuts, burns, or frayed wires. A damaged cord can cause voltage issues.

  4. 4

    Step 4

    4. To verify the outlet is working correctly, unplug the dishwasher and plug in a small, known-working appliance like a lamp or a phone charger.

  5. 5

    Step 5

    5. Dishwashers should be on a dedicated circuit. Remove any extension cords or power strips and plug the appliance directly into the wall outlet.

  6. 6

    Step 6

    6. If these steps do not resolve the issue, the problem may be with your home's wiring, which requires a professional electrician to diagnose and repair.

Read the additional checks from the current guide

How to Fix E27 Error (Step-by-Step) Locate your home’s main electrical panel and check if the circuit breaker dedicated to the dishwasher has tripped. If it is in the middle or off position, flip it fully off and then back on to reset it. Ensure the dishwasher’s power cord is pushed all the way into the wall outlet. Sometimes vibrations can cause it to become loose. Examine the entire length of the power cord for any visible signs of damage, such as cuts, burns, or frayed wires. A damaged cord can cause voltage issues. To verify the outlet is working correctly, unplug the dishwasher and plug in a small, known-working appliance like a lamp or a phone charger. Dishwashers should be on a dedicated circuit. Remove any extension cords or power strips and plug the appliance directly into the wall outlet. If these steps do not resolve the issue, the problem may be with your home’s wiring, which requires a professional electrician to diagnose and repair. Turn the appliance off, wait about 2 minutes, then turn it back on. Recommended Parts to Check No exact official OEM part number is listed here because the correct Bosch dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims. Bosch dishwasher water inlet valve Common replacement category: Water inlet valve Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. Search Amazon for Bosch dishwasher water inlet valve Bosch dishwasher drain pump Common replacement category: Drain pump Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. Search Amazon for Bosch dishwasher drain pump Bosch dishwasher circulation pump Common replacement category: Circulation pump / wash motor Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked. Search Amazon for Bosch dishwasher circulation pump Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag. Still Not Working? If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure. Ask a Technician Online – Get Answer in Minutes Find a Local Repair Pro Near You

If the code comes back

Do not keep replacing parts based only on the code. Repeat the safe checks above. If the fault remains, stop and arrange qualified service rather than ordering from the code alone.

What may be causing it?

  • Power supply issue
  • Low incoming voltage
  • Damaged or faulty control board

These are possibilities to investigate, not proof that one part has failed.

Recommended part

Recommended part for this error code

Replacement part

OEM candidate: 12015863

Why this part is shown: It is associated with Bosch Dishwasher error E27 in the current guide. The error code alone does not prove this part has failed.

Compatibility varies by model. Confirm that the Amazon listing includes your complete dishwasher model number before ordering.

Amazon part link View recommended part on Amazon

You can open the recommendation now. Check model compatibility on the Amazon page before purchasing.

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Replacement options

Ready to replace your dishwasher?

If repairing this dishwasher no longer feels worthwhile, compare three replacement paths below.

Why shop your replacement on Amazon?

  • Fast, free delivery

    Prime members can get fast, free delivery on eligible items.

  • Convenient delivery options

    Select large appliances may offer scheduled or Room of Choice delivery.

  • Haul-away options

    Haul-away may be available for select appliances and delivery areas.

  • Installation help

    Installation or assembly may be available on select items.

Delivery and service options, fees, and availability vary by item, seller, and delivery ZIP code. Confirm available services at Amazon checkout.

Affiliate disclosure: qualifying purchases may earn this site a commission at no additional cost to you.

Make the money decision

Repair or replace calculator

Use the age and total repair estimate to get a simple comparison. This is guidance, not a guarantee.

Safety first

Disconnect power before opening panels or touching internal parts.

When to stop
  • Stop if you see burned wiring, melted connectors, water near electrical parts, or a gas smell.
  • Do not perform live-voltage testing unless you are trained and equipped for it.
  • Use the exact model manual or service information before replacing electronic controls.

Free quick sheet

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