How to Replace a Bosch Dishwasher Inlet Valve (BSH 00622058)
The water inlet valve controls water flow into your Bosch dishwasher. When it fails, the dishwasher either will not fill (error E17 — water intake failure) or fills continuously and overflows (valve stuck open, often triggering the AquaStop flood sensor and error E15). Bosch uses a dual-solenoid valve (BSH 00622058) on most models — both solenoids must function for the valve to operate correctly.
This is a moderately straightforward repair because the inlet valve is accessible through the kick plate area without tipping the unit. You will need to disconnect the water supply, so plan to do this repair when the dishwasher is not needed for a few hours.
Before You Start
- Tools needed: Torx T20 driver, 10mm socket or wrench, needle-nose pliers, adjustable pliers or channel locks, multimeter, towels, small bucket
- Parts needed: Water inlet valve BSH 00622058 (~$35-$65)
- Time required: 30-45 minutes
- Difficulty: Intermediate
- Safety warning: Disconnect power at the circuit breaker and close the water supply valve under the sink. The supply line will have residual water under pressure — place a bucket and towels before disconnecting. If the valve was stuck open and water reached the base pan, the AquaStop system may have activated — you may need to drain the base pan during this repair.
Do You Have the Right Tools?
Water pressure gauge ($60), spray arm tester, float switch multimeter ($85), and drain inspection camera. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
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Step-by-Step Instructions
Step 1: Verify the Inlet Valve Is the Problem
Before replacing parts, confirm the valve is faulty. Check that the water supply valve under the sink is fully open (partially closed supply mimics a bad inlet valve). Listen during a fill cycle — you should hear a buzzing/humming from the valve when it activates. If silent, the valve solenoid may not be receiving power (control board issue) or the solenoid has failed. Test with a multimeter: each solenoid coil should read 700-1500 ohms. Open circuit = failed coil.
Step 2: Disconnect Power and Water Supply
Switch off the circuit breaker. Close the water supply valve under the sink (clockwise until firm). Place a bucket under the supply line connection. Using a 10mm wrench, disconnect the brass supply line fitting from the dishwasher inlet valve. Water will flow — let it drain into the bucket.
Step 3: Remove the Kick Plate for Access
Remove the 2 Torx T20 screws at the bottom of the kick plate. Slide the panel forward and down. The inlet valve is located at the lower-left corner of the dishwasher (when viewed from the front), directly behind where the water supply line connects. On Bosch models with AquaStop, the AquaStop hose connects to the inlet valve — do not confuse the AquaStop control box (at the faucet end) with the inlet valve (at the dishwasher end).
Step 4: Disconnect the Electrical Connectors
The inlet valve has 2 solenoid coils, each with its own 2-wire connector. These are spade-type push-on connectors. Note which connector goes to which solenoid (photograph or label them — they are NOT interchangeable on the dual-solenoid design). Gently pull each connector straight off its terminal. If stuck, use needle-nose pliers to grip the connector body (not the wire) and rock gently.
Step 5: Disconnect the Internal Water Hose
On the outlet side of the valve (facing into the dishwasher), a rubber hose carries water from the valve to the tub fill point. This hose is secured with a spring clamp. Squeeze the clamp with pliers, slide it back, and pull the hose off the valve outlet. Some water will drain — have a towel ready.
Step 6: Remove the Inlet Valve
The valve is mounted to a bracket on the dishwasher frame with 1-2 Torx T15 screws, or it may snap into a plastic mounting clip. Remove the screws or release the clip. The valve now pulls free. Note the position of any rubber washers or inlet screens — the inlet has a small mesh filter screen that should be transferred to the new valve if the replacement does not include one.
Step 7: Inspect the Inlet Screen
Before installing the new valve, check the small wire mesh screen inside the inlet fitting (where the supply line connects). Mineral deposits and debris clogging this screen are a common cause of slow fill that mimics a valve failure. If the screen is badly calcified, you may find that a new screen alone (included with some replacement valves) solves the problem.
Step 8: Install the New Valve
Mount the new valve in the same position and orientation as the old one. Secure with the Torx T15 screws or snap into the mounting clip. Reconnect the internal water hose — push it fully onto the outlet barb and slide the spring clamp back into position. Reconnect the electrical connectors to the correct solenoids (match your labels/photos). Reconnect the water supply line — hand-tight, then 1/4 turn with the 10mm wrench. Do not overtighten — the brass fitting seals against a rubber washer.
Step 9: Test for Leaks Before Closing Up
Replace the kick plate loosely (don't screw it in yet). Open the water supply valve slowly. Check the supply line connection for drips. Restore power and start a Quick Wash cycle. Watch the supply connection and the internal hose connection through the kick plate opening for the first 5 minutes. If dry, secure the kick plate with its Torx T20 screws.
Understanding Fill-Related Error Codes
| Code | Meaning | Connection to Inlet Valve |
|---|---|---|
| E17 | Water intake failure | Valve not opening — failed solenoid, clogged screen, or closed supply |
| E15 | Leak detected (AquaStop) | Valve stuck open, overfilling — water reached base pan float switch |
| E03 | Fill timeout | Similar to E17 on older models |
Safety First — Know the Risks
Live 120V wiring in a wet environment is one of the most dangerous DIY scenarios. Water + electricity = serious shock risk. Our techs are licensed and insured — let them handle the risk.
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AquaStop Hose Compatibility Note
Bosch dishwashers with AquaStop have an integrated flood-protection hose that connects the faucet to the inlet valve. The AquaStop hose includes its own solenoid shutoff and leak sensor. When replacing the inlet valve, you do NOT need to replace the AquaStop hose unless it has been triggered (the AquaStop system is single-use on some older models). Test: if the AquaStop hose valve is stuck closed even with power applied, the AquaStop needs replacement too (BSH 00667327).
When to Call a Professional
Consider professional help if:
- Error E15 is active (water in the base pan) — the AquaStop system needs professional reset and the base pan must be drained and dried before the float switch will reset
- Both solenoid coils test good but the valve still does not open — the control board may not be sending the activation signal
- The supply line connection leaks despite a new washer and proper tightening — the brass fitting on the dishwasher body may be cross-threaded or damaged
- You have an integrated AquaStop system that has tripped — some versions require a Bosch diagnostic tool to reset
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The Real Cost of DIY
Average DIY attempt: $150-400 in tools you may use once, plus the risk of further damage. Our diagnostic visit costs $0 — we find the problem and give you an honest quote.
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Cost Comparison: DIY vs Professional
| DIY | Professional | |
|---|---|---|
| Parts | $35-$65 | $35-$65 |
| Labor | $0 | $120-$220 |
| Time | 30-45 min | 20-30 min |
| Risk | Low | Warranty included |
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FAQ
Q: My Bosch dishwasher fills slowly but eventually completes the cycle. Do I need a new inlet valve? A: Not necessarily. Slow filling is most commonly caused by a clogged inlet screen (the small mesh filter inside the valve's water inlet). Remove and clean or replace this screen first — it is a $2 fix that resolves the majority of slow-fill complaints. Only replace the valve if the solenoids test bad or the screen is clear but flow is still restricted.
Q: Can I use a universal inlet valve instead of the Bosch-specific BSH 00622058? A: We do not recommend it. Bosch uses a dual-solenoid design with specific flow rates calibrated to their wash system. A universal single-solenoid valve may fill at the wrong rate, causing fill timeout errors or poor wash performance. The BSH part ensures correct flow rate, connector compatibility, and mounting fit.
Q: Why does my Bosch dishwasher keep tripping the AquaStop? A: Repeated AquaStop trips (E15) with a properly functioning inlet valve usually mean water is leaking internally — from a cracked sump, loose hose clamp, or failed door seal. The AquaStop float switch sits in the base pan and triggers when any water accumulates there. Diagnose the actual leak source rather than just resetting the AquaStop.
Q: Is the inlet valve the same part as the AquaStop valve? A: No. The inlet valve sits inside the dishwasher behind the kick plate and controls water flow into the wash tub. The AquaStop valve is a separate component located at the faucet end of the supply hose, providing flood protection. They are different parts with different part numbers and functions.
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