Error Code: H Difficulty: Hard
Problem: Indicates a heating problem, which could be due to a faulty heating element, thermostat, or a wiring issue.
How to Fix H Error (Step-by-Step)
- Disconnect the dishwasher from power by turning off the circuit breaker and shut off the water supply line, usually found under the sink.
- Carefully pull the dishwasher out from under the counter. You may need to disconnect the drain hose and water inlet line from the house plumbing to get enough slack.
- Lay the dishwasher on its back on a soft towel or blanket to access the components on the bottom.
- Locate the heating element assembly and the high-limit thermostat/NTC sensor. The heating element is a circular tube, and the sensor is a small probe inserted into the sump or heater housing.
- Visually inspect the heating element for any breaks or signs of burnout. Use a multimeter to test the element for continuity. A reading of infinity indicates a faulty element that needs replacement.
- To replace the heating element or sensor, carefully disconnect the wire terminals. Remove any nuts or clips holding the component in place and pull it out, being mindful of any rubber seals.
- Install the new part, ensuring any seals are properly seated to prevent leaks. Reconnect the wiring, then carefully tip the dishwasher upright, slide it back into place, and reconnect the water and drain lines.
- Restore power and run a test cycle to ensure the dishwasher heats properly and there are no leaks.
What to Check Next on This Bosch Dishwasher
Bosch Dishwasher Error H: Use the code, light, or symbol as the starting clue, then confirm what the dishwasher actually does before ordering parts.
- 1. Turn power off before opening panels, reaching into the sump, touching wiring, or checking the pump, heater, valve, sensor, latch, or control area.
- 2. Confirm whether the display is a normal cycle/status symbol or a recurring fault that interrupts filling, washing, draining, drying, locking, or control response.
- 3. Start with the wash path: filter, sump debris, spray-arm movement, circulation-pump sound, wiring, and control output.
- 4. Clean the filter and sump, check spray-arm movement, verify water supply, inspect the drain hose and sink connection, and correct any visible blockage before replacing parts.
- 5. Run a short test cycle and watch where it fails; the exact stage matters more than the displayed word or symbol by itself.
- 6. Replace a part only after the same symptom repeats and the model-specific checks point to that part category. Match any replacement to the complete Bosch model number on the door tag.
If the issue returns after these checks, match replacement parts to the complete Bosch dishwasher model number from the door tag. The same display clue can point to different components depending on the exact model and when the failure appears.
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.
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Bosch dishwasher water inlet valveCommon replacement category: Water inlet valveFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. -
Bosch dishwasher drain pumpCommon replacement category: Drain pumpFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. -
Bosch dishwasher circulation pumpCommon replacement category: Circulation pump / wash motorFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked.
Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag.
When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Bosch error codes: Bosch Error Codes
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