Understanding Common Bosch Appliance Error Codes

Bosch appliances are very communicative. When a fault is detected, they display a code, usually starting with “E”. Understanding these is the first step in diagnosis. Here are a few common ones:

E15 (Dishwashers): The AquaStop sensor has detected water in the base of the unit. The machine will run the drain pump continuously and will not shut off until the leak is fixed.

E24 / E25 (Dishwashers): Drain error. The water cannot exit the tub. E24 usually means the drain hose is blocked or the cover on the pump is missing. E25 usually means the pump impeller is jammed.

E01 / E02 (Dishwashers): Power module failure. The main control board likely needs replacement.

E04 (Dishwashers): Water flow sensor failure. The machine cannot tell how much water is entering.

E18 (Washers): Pump time-out. The water is not draining fast enough. Usually a clogged coin trap.

F09 (Ovens): Heat up time exceeded. The oven is not getting hot fast enough, indicating a bad element.

While these codes provide direction, they are not a definitive diagnosis. We use them as a starting point for our physical testing to locate the true cause of the failure.

An In-Depth FAQ for Bosch Appliance Owners in Arlington

We believe in keeping our customers informed. Below are detailed answers to the questions we frequently hear from homeowners in Arlington regarding their Bosch appliances.

• Why is my Bosch dishwasher flashing E15?
  The E15 error is the most common Bosch dishwasher fault. It indicates that the safety float switch in the bottom pan of the dishwasher has been activated by water. This means there is an internal leak. It could be from the sump seal, the water inlet valve, or a loose hose. The machine activates the drain pump as a safety measure to prevent flooding your kitchen. To fix this, the unit must be pulled out, the water removed, and the leak identified and repaired.
• Why is my Bosch dishwasher not draining (E24)?
  E24 is a drain error. Bosch dishwashers are very sensitive to drain restrictions. First, check the filter at the bottom of the tub. Then, ensure the small white cover over the drain pump impeller is clicked firmly into place. If this cover is loose, the pump cannot create pressure. Also, check the connection to your garbage disposal; if the hose is kinked or the disposal is blocked, E24 will appear. We can clear the blockage and test the pump.
• Why are my dishes wet in my Bosch dishwasher?
  Bosch dishwashers do not use a heating element at the bottom like American brands. They use condensation drying. The final rinse uses very hot water, which heats the dishes. The stainless steel tub cools down faster than the dishes, causing moisture to condense on the walls and run down the drain. For this to work, you must use rinse aid. Without rinse aid, water beads up on the dishes and does not evaporate. If you are using rinse aid and they are still wet, the heat exchanger or the fan may be broken.
• Why is my Bosch refrigerator not cooling?
  If the fridge is warm, it could be the compressor or the inverter board. Bosch fridges often use variable-speed compressors. If the inverter board fails to send the right frequency signal, the compressor won’t run. Also, check the condenser coils for dust. If you have a dual evaporator model, the fresh food evaporator fan may have failed, preventing cold air from circulating. We can diagnose the specific electronic or mechanical failure.
• My Bosch washer is stuck with water in it.
  If your compact Bosch washer won’t drain and the door is locked, it is likely a clogged coin trap. On most models, there is a round access panel on the bottom right front. Behind it is a screw-out filter. **Warning:** If you open this with a full drum, water will flood the floor. We have the tools to drain the machine safely before accessing the filter to remove coins, buttons, or lint that is blocking the pump.
• Why is my Bosch dryer taking hours to dry?
  If you have a Bosch condensation dryer (no vent hose), the condenser unit at the bottom left must be removed and rinsed out regularly. If it gets clogged with lint, air cannot circulate, and the moisture cannot condense. If you have a vented dryer, check the home’s vent duct. If the airflow is restricted, the dryer will overheat and shut off the heater. We can inspect the condenser system or the heating element.
• Bosch oven displaying error code E005?
  This code often relates to the control module not communicating with the relay board. It can happen after a power surge. Sometimes flipping the breaker off for five minutes can reset it. If the code returns, the control board likely needs replacement.
• Why does my Bosch gas cooktop keep clicking?
  Bosch gas cooktops have an “auto-reignition” feature. If the flame blows out, it sparks to relight it. If the flame sensor (thermocouple) is dirty or failed, it won’t detect the heat of the flame and will keep clicking thinking the flame is out. Also, if the burner cap is wet after cleaning, the spark may be shorting out. We can clean the sensor or replace the spark module.
• Is it worth repairing a Bosch appliance?
  Bosch appliances are premium products with a high initial cost. They are built to last 15-20 years. Repairing a Bosch dishwasher or laundry unit is almost always more economical than replacing it, as the build quality is superior to many disposable brands. A new pump or control board can extend the life of the machine significantly. We provide an honest assessment of the machine’s condition.
• Why is my Bosch microwave turntable not turning?
  If the turntable motor fails, the food will not cook evenly. The motor is located under the floor of the microwave. It can be replaced from the bottom. Sometimes the plastic coupler that connects the motor to the glass tray cracks. We can inspect the drive mechanism and restore rotation.