Bosch Dishwasher Not Filling With Water

Most Common Reasons a Bosch Dishwasher Is Not Filling With Water

A dry Bosch tub does not identify a failed inlet valve by itself. The useful order is external supply, visible restriction, program and door permission, protective level state, then the commanded fill system.

The dishwasher water supply is turned off or unavailable: Bosch manuals tell owners to confirm that the household supply is on. This often follows plumbing or sink work, installation, a move, a building shutoff, or a valve that was never reopened. Safe evidence is a visibly closed under-sink valve or another known interruption to the branch. Diagnosis must verify usable flow and pressure at the dishwasher connection before the appliance is opened.
The accessible inlet hose is kinked, damaged, or restricted: Bosch's E16/E17 and E18 guidance points to the inlet hose because a sharp bend or restriction prevents enough water from reaching the fill system. A problem that begins after installation or the dishwasher was pushed back strengthens this route. Look only at the section visible without pulling the dishwasher. Diagnosis must prove whether the restriction is in the household supply, hose, AquaStop/inlet assembly where equipped, or the appliance-side path.
The dishwasher has not actually reached the fill stage: An unfinished previous cycle, Delay Start, a door that is not recognized, or a Start sequence that was not accepted can leave the tub dry. A power interruption or cancelled cycle can leave the old program state unresolved. Bosch manuals list these conditions separately from a failed fill component. Diagnosis must confirm the program state, Start input, door proof, and requested fill command.
A float, level, or leakage-protection state is preventing another fill: Bosch identifies a malfunctioning float as one possible no-fill category and defines E15 as water detected in the base with leakage protection activated. A no-fill that follows a leak or E15 event stays on the protection path until the source and state are proved. Diagnosis must separate a true leak from a false input without tilting or drying the base to suppress the evidence.
The inlet valve or fill-metering path does not pass the requested water: Bosch names the inlet valve and filling system in its no-fill and error-code guidance. E14, E16/E17, and E18 describe different flow/filling conditions; none proves one replaceable part without the exact E-Nr. Diagnosis must measure valve command, water delivery, fill time, restriction, and flow feedback.
Door input, wiring, or control output never authorizes the valve: Bosch's symptom guidance includes the door switch, while service-level fill diagnosis must also separate protection inputs, wiring, and control output. A no-fill that begins immediately after internal service also requires the disturbed harness and fill path to be checked against the work performed. Safe evidence is an accepted-looking Start with correct external supply but no water. Diagnosis must test the exact model's inputs and outputs rather than replacing a board or valve by symptom.

First Confirm It Is Really a No-Fill Problem

Start is ignored and nothing begins: That is still a Bosch dishwasher won't start decision. Resolve panel, door, cycle, Start, delay, lock, and reset state before diagnosing fill.
Start is accepted, but the tub stays dry: This is the no-fill observation. Note whether the dishwasher makes an initial pump sound, shows a water symbol, or ends early, but do not use the sound alone to name a part.
A small amount of water enters, then the warning appears: That may be low flow or a measured-fill problem rather than zero supply. Preserve the exact code or symbol and the time from Start to warning.
Water is already standing at the bottom after a cycle: That is a Bosch dishwasher not draining problem. A dishwasher that cannot clear the previous water may not proceed normally, but the retained-water evidence belongs to the drain diagnosis.
Water is outside the dishwasher or E15 appears: This is no longer a routine fill check; use the leak-protection path and the stop conditions below.

What Bosch Water Codes and Symbols Change

The exact display matters because Bosch uses different code families across models. Record the full code—not only the first two characters—and use the E-Nr manual.

Water-tap or Check water supply indication: This is evidence of a water-supply/fill concern, not proof that the inlet valve failed. Check the visible supply and hose, then preserve the indication.
E14: Bosch describes a flow-meter failure or a problem with water flowing into the dishwasher or filling system. It needs code-specific diagnosis.
E16 or E17: Bosch describes a water-flow or filling-system issue and directs the user to check the inlet hose for visible kinks or damage.
E18: Bosch describes water flow that is too low or not pumped correctly and tells the user to confirm the supply is on and the inlet hose is not kinked. The published flow figure is useful for professional supply proof; disconnecting a built-in supply line for a homeowner bucket test is not a universal safe step.
E15: Bosch says water has been detected in the base and leakage protection is active. The code identifies the protected condition, not the leaking part.
Longer current code forms: Newer code families may show expanded equivalents. Use the complete display and exact manual instead of shortening the code into an older label.

Safe Checks Before Service

Start confirmation: Open the door, select one normal cycle, press Start once, and close the door as the E-Nr manual directs.
Water shutoff: Confirm the visible under-sink dishwasher valve is fully open. Do not use force on a stuck or corroded valve.
Visible hose: Look for a sharp bend, crushing, or fresh damage only where the inlet line is already accessible. Do not pull the dishwasher out.
Control state: Check for Delay Start, an unfinished cycle, or a door indication. Use one model-approved cancel/reset only when the manual calls for it.
Display evidence: Photograph the water-tap symbol, Check water supply light, E14, E15, E16/E17, E18, or the full expanded code.
Recent work: Write down installation, plumbing, shutoff, move, power loss, or service work immediately before the symptom.
Water evidence: Note whether the tub is completely dry, gets a small amount of water, has old standing water, or has water outside the unit.

What Not to Do

Do not disconnect a pressurized inlet hose or AquaStop assembly: A visible hose check is different from opening the water system.
Do not remove the kickplate to test the inlet valve: Valve voltage and control outputs are technician checks.
Do not lift, tape, or bypass a float or door switch: Protection inputs must remain functional during diagnosis.
Do not tilt the dishwasher to clear E15 or a base sensor: That can hide the active leak, move water toward electrical parts, and stress built-in connections.
Do not add water manually to force the wash cycle: It bypasses the condition being diagnosed and can create an overfill or leak.
Do not replace the valve, board, or float from an online probability: The exact failed point must be measured.

When to Stop and Shut Off the Water

E15, E3100, or an applicable leakage-protection indication appears: Turn off the dishwasher water supply if it can be reached safely and keep the appliance off.
Water is on the floor, under the cabinet, or near electrical connections: Do not run another cycle.
The inlet hose or connection is visibly damaged or dripping: Stop the supply rather than tightening or disassembling it under pressure.
The breaker trips, a hot electrical smell appears, or controls get wet: Isolate power from a dry location if it is safe to do so and stop.
The supply valve is stuck, corroded, or begins leaking when touched: Stop and have the plumbing connection handled safely.

What Diagnosis Must Confirm

A Bosch no-fill diagnosis should use the full E-Nr and reproduce the start command only after the water/electrical area is safe. The technician needs to separate:

usable household flow and pressure from a closed/restricted supply;
visible inlet line and AquaStop/inlet path where equipped;
door, program, delay, reset, and protection inputs from a valid fill request;
command reaching the inlet valve from a valve that cannot open or pass enough water;
water entering the appliance from the flow meter or level feedback reporting it incorrectly;
E15/base protection from E14/E16/E17/E18 fill-code conditions;
wiring and connector integrity from a failed control output.

That sequence determines whether the repair belongs to plumbing/supply, installation, valve/flow path, sensing/protection, wiring, or control. It prevents replacing a good inlet valve when the dishwasher never requested water.

What to Record Before Service

Model identity: Photograph the complete E-Nr, FD, and serial label.
Exact display: Capture the whole code or symbol before reset or power interruption.
Start sequence: Record one short video from cycle selection through the first sound or warning.
Water result: Note no water, a small amount, old standing water, or external water.
Supply state: Photograph the under-sink valve and visible hose without changing plumbing connections.
Timing: Note seconds or minutes from Start to the warning or stop.
Recent event: Record installation, sink/plumbing work, building shutoff, move, service, leak, or power loss.