E03
Bosch Dishwasher
Severity: ModerateWhat Does This Error Mean?
Bosch dishwasher error E03 means the machine tried to fill with water but did not reach the required level within the allowed time. The dishwasher gave up waiting and stopped the cycle to prevent damage. This is usually caused by a water supply problem or a faulty inlet valve.
Affected Models
- Bosch Series 2
- Bosch Series 4
- Bosch Series 6
- Bosch Series 8
- Bosch Silence Plus
Common Causes
- The water supply tap under or behind the dishwasher has been turned off or is partially closed
- The inlet hose is kinked, pinched, or blocked, restricting water from entering the machine
- The water inlet valve is clogged with limescale or debris and is not opening fully
- The water inlet valve has failed electrically and is not opening at all
- Your home's water pressure is too low to fill the dishwasher within the required time
How to Fix It
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Check the water supply tap. It is usually located under the sink or behind the dishwasher. Make sure it is fully open — turn it counterclockwise to open.
This is the most common and easiest cause to fix. Always check it first.
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Inspect the inlet hose at the back of the dishwasher. Pull the dishwasher out slightly if needed and check that the hose is not kinked, bent sharply, or crushed.
A kinked hose can completely stop water flow even if the tap is fully open.
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Check the mesh filter inside the inlet valve connection. Turn off the water supply, disconnect the inlet hose from the back of the dishwasher, and look for a small mesh screen. Remove and rinse it if it is clogged with debris.
Limescale and sediment build up in this filter over time, especially in hard water areas.
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Check your home water pressure by running a tap fully. If the flow seems weak, contact your water supplier — low pressure can prevent the dishwasher from filling fast enough.
Dishwashers generally need at least 0.5 bar (7 PSI) of water pressure to fill correctly.
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If all of the above are fine, the water inlet valve itself is likely faulty and needs replacement. Book an appliance technician to replace it — it is a common, relatively inexpensive repair.
Inlet valves typically cost $20 to $50 for the part. Labor adds to the total.
When to Call a Professional
If the tap is open, the hose is clear, and the water pressure is fine, the inlet valve likely needs replacing. Inlet valve replacement involves disconnecting plumbing and electrical connections inside the dishwasher. Book an appliance technician if you are not comfortable doing this yourself.
Frequently Asked Questions
Why would my dishwasher suddenly stop filling if it worked before?
The most common sudden causes are a kinked hose (if the machine was moved recently) or a clogged filter inlet (from scale buildup over time). Less commonly, the inlet valve can fail without warning. Start with the simple checks before assuming the valve needs replacing.
Is E03 the same as the dishwasher not getting any water at all?
Yes, E03 appears when the machine expects to fill but either gets no water or gets water too slowly. Both situations trigger the fill timeout. Check the tap, hose, and filter before assuming a valve failure.
How do I know if it is a water pressure issue?
Run a cold tap on full in your kitchen sink and observe the flow rate. If the pressure seems lower than usual, check other taps in the house. If pressure is low everywhere, contact your water provider — it may be a supply issue.