What Does Error Code E29 Mean on a Bosch Washing Machine?
Check that the cold water tap behind the machine is fully open and the inlet hose is not kinked — straightening the hose or opening the tap fully should clear the error and allow the cycle to resume within about 5 minutes.
Fault description
Error code E29 is a water supply fault. It means your Bosch washing machine started a cycle, attempted to fill with water, and either received no water at all or detected that the flow rate was too low to continue safely. The machine will pause or stop mid-cycle and display E29 on the control panel.
The fault sits within the water intake system — specifically the path from your household supply through the inlet hose and inlet valve into the drum. When the machine cannot confirm adequate pressure within a set time window, it triggers this code as a protective measure to prevent the motor and heating element from running dry.
In most cases this is a straightforward issue you can resolve without tools. A closed or partially closed tap, a kinked hose, or a clogged mesh filter inside the inlet valve connection are the most frequent culprits.
Causes
- Closed or partially closed water tap — The cold water supply tap behind the machine may have been accidentally knocked shut or left only partially open after a previous repair or move. Even a tap that is three-quarters open can restrict flow enough to trigger E29.
- Kinked or crushed inlet hose — If the machine has been pushed back against the wall, the inlet hose can become bent or flattened, severely reducing water flow. This is especially common after the appliance has been moved for cleaning or installation.
- Blocked inlet valve mesh filter — A small mesh filter sits inside the inlet valve connection point where the hose meets the machine. Over time, sediment and limescale from the water supply can clog this filter, reducing pressure to a trickle.
- Faulty or seized inlet valve — The solenoid-operated inlet valve controls water entry into the drum. If the valve coil fails electrically or the valve body becomes stuck due to limescale build-up, it will not open fully, starving the machine of water.
- Low household water pressure — A temporary drop in mains water pressure — caused by works in your street, a partially closed stopcock, or high demand in the building — can be enough to trigger E29. Checking other taps in the house will confirm whether this is a wider supply issue.
- Faulty pressure sensor or wiring — Less commonly, the water level pressure sensor or its connecting wiring harness can develop a fault, causing the machine to misread the fill level and report E29 even when water supply is normal.
Step-by-Step Fix
- 1
Check the water supply tap
Locate the cold water tap on the wall behind the washing machine and make sure it is turned fully anti-clockwise (fully open). It sounds obvious, but this single check resolves the fault in a large proportion of E29 cases. Once open, restart the cycle and observe whether the machine begins to fill normally.
- 2
Inspect the inlet hose for kinks
Gently pull the machine forward a few centimetres and run your hand along the full length of the inlet hose from the tap to the back of the machine. Straighten any bends or kinks you find. Ensure there is enough slack in the hose so it does not get crushed when the machine is pushed back into position.
- 3
Clean the inlet valve mesh filter
Turn off the water tap and place a towel and small bowl under the hose connection at the back of the machine. Unscrew the inlet hose by hand — expect a small amount of residual water. Use a pair of needle-nose pliers or your fingers to carefully pull out the small mesh filter from inside the valve port. Rinse it under a running tap and use an old toothbrush to remove any sediment or limescale, then refit it and reconnect the hose securely before turning the tap back on.
- 4
Check household water pressure
Turn on a cold tap elsewhere in your home — a kitchen sink or bathroom basin — and observe the flow. If pressure seems low throughout the house, the issue is with your mains supply rather than the machine. Contact your water supplier or check whether your property's main stopcock is fully open.
- 5
Power cycle the machine
Switch the machine off at the mains socket, wait 60 seconds, then switch it back on and select a new cycle. This clears any stored fault state and allows the machine to attempt a fresh fill sequence. If the water supply is now adequate, the cycle should proceed without the E29 code returning.
- 6
Test the inlet valve
If the above steps have not resolved the fault, the inlet valve itself may be faulty. With the machine unplugged, disconnect the inlet hose and inspect the valve body for visible limescale damage or cracking. You can test the solenoid coils for continuity using a multimeter — a reading of open circuit (infinite resistance) confirms a failed coil. Replacement inlet valves for Bosch machines are widely available and are a straightforward part to swap out.
- 7
Check the pressure sensor and wiring
If the inlet valve tests fine but E29 persists, inspect the wiring harness running from the inlet valve and pressure sensor to the main control board. Look for any loose connectors, pinched wires, or signs of corrosion. Reseat any connectors that appear loose. If wiring looks intact but the fault remains, the pressure sensor may need replacing — at this point professional diagnosis is advisable.
Affected models
Select your model to see its full troubleshooting page.
When to call a service technician
If you have confirmed the water tap is fully open, the hose is clear, and the mesh filter is clean, but the machine still displays E29 and fails to fill, the fault is likely internal. A seized or electrically failed inlet valve, a defective pressure sensor, or a fault on the main control board all require component-level testing that goes beyond basic DIY checks.
You should also call a service technician if you notice any water leaking from the inlet valve area, if the machine trips your household electrics when it attempts to fill, or if the wiring harness shows signs of burning or damage. These symptoms indicate a more serious fault that needs professional attention before the machine is used again.
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Frequently Asked Questions
Can I still use my Bosch washing machine while it shows E29?
No — when E29 is active the machine has halted the cycle because it cannot confirm a safe water supply. Running the machine in this state risks damaging the pump, heating element, or drum bearings. Resolve the water supply issue first, then restart a cycle.
Will E29 clear itself once I fix the water supply?
In most cases, yes. Once the root cause is resolved — tap opened, hose straightened, or filter cleaned — switching the machine off at the mains for 60 seconds and restarting it will clear the error code. If E29 returns immediately on the next fill attempt, there is still a restriction or a component fault to address.
How do I know if my inlet valve needs replacing rather than just cleaning?
If cleaning the mesh filter makes no difference and the hose and tap are both fine, test the valve solenoid coils with a multimeter set to resistance. A healthy coil typically reads between 200 and 500 ohms depending on the model. An open circuit reading means the coil has failed and the valve needs replacing.
Could a frozen pipe cause error E29 in winter?
Yes. In very cold weather, the external section of the inlet hose or the pipe leading to the tap can freeze, completely blocking water flow. If you suspect this, do not use a naked flame to thaw the pipe. Instead, apply warm (not boiling) water or a warm cloth to the affected section and allow it to thaw gradually.
My water pressure seems fine everywhere else in the house — why is the machine still showing E29?
If household pressure is normal, the restriction is almost certainly local to the machine — most likely the mesh filter inside the inlet valve connection, a partially seized valve, or a faulty pressure sensor giving a false reading. Work through the cleaning and inspection steps above, and if the fault persists after checking the valve, contact a service technician for a diagnostic visit.