Bosch Error Codes & Diagnostics
Complete diagnostic directory for official Bosch fault codes. Verify root causes, safe troubleshooting steps, and replacement part numbers before calling a technician.
Bosch Dishwasher Error Code E15: Water in Base Trough (AquaStop Activated)
Safety float switch in the base pan detected pooled water, engaging AquaStop anti-flood safety lock.
Bosch Dishwasher Error Code E24: Drain Issue / Pump Blocked
The drain pump cannot expel wash water within expected cycle time due to blockage or kinked hose.
Bosch Climate 5000 EC 07 outdoor fan speed fault
On Bosch Climate 5000 Generation 3 R-454B multi-zone equipment, EC 07 means the outdoor fan speed is outside the control's expected range. The service procedure considers fan obstruction and assembly, motor wiring and feedback, the motor itself, and the outdoor PCB; the code does not select one of them. Applies to: Climate 5000 Generation 3 R-454B multi-zone This code definition applies only to the May 2025 Climate 5000 Gen 3 R-454B multi-zone manual. Earlier R-410A Climate 5000, single-zone, IDS, boiler, and Compress products use different references. Owner-safe checks: With the unit off, document EC 07, the exact outdoor model, guard and clearance condition, ice, and fan behavior from outside the cabinet. Qualified technician: Fan access, motor resistance and feedback, harness, live inverter-board, refrigerant, and R-454B safety checks require qualified Bosch service.
Bosch PC 30 and PC 31: codes that exist on three outdoor models
PC 30 is high pressure protection and PC 31 is low pressure protection, and the service manual restricts both to three named outdoor units. An outdoor unit outside that list has no pressure switches to report on and will show a different code instead. Applies to: Climate 5000 Generation 3 R-454B multi-zone outdoor units The code table here is from the Bosch Climate 5000 Generation 3 R-454B multi-zone service manual dated May 2025, which covers the outdoor units. Indoor codes are published in the indoor service manual, and earlier Climate 5000 generations on a different refrigerant platform have their own documentation. Owner-safe checks: Record the full outdoor model number from the data plate and check it against the three models these codes are published for. | Photograph the code exactly, since the prefix and the final character both change the meaning. | Note the outdoor temperature, the mode, and how long the system had been running when it stopped. Qualified technician: Pressure measurement requires gauges on service ports and a certified technician, and this refrigerant platform has its own handling requirements. | Do not restart repeatedly against a protection code, since each attempt returns the system to the condition that stopped it.
Bosch Climate 5000: reading a code that names an indoor or outdoor origin
Bosch Climate 5000 codes are built from a prefix and a pair of digits, and the prefix carries real information: it says whether the indoor unit, the outdoor unit, or the link between them raised the condition. Reading the prefix first narrows a search that would otherwise begin with the digits and end in the wrong table. Applies to: Bosch Climate 5000 ductless mini-split systems documented in the Bosch service and manual library The Climate 5000 name covers single-zone and multi-zone equipment across more than one generation, and code assignments differ between them. Match the prefix and digits against the manual for the indoor and outdoor models on your data plates rather than against a chart for the range as a whole. Owner-safe checks: Photograph the indoor display so that the prefix and the digits are both captured together. | Copy the indoor and outdoor model numbers from their data plates before searching anything. | List any building work, decorating, or trades activity near the pipework or its cable route in recent months. Qualified technician: Interconnecting cable on this equipment carries mains voltage between the units, so inspecting, testing, or reterminating it is qualified work. | Outdoor protections reported through the indoor display involve the refrigerant circuit, which is certified activity rather than an owner check.