Bosch · Washing Machine

E1

Water Intake Fault

Severity

High

If your Bosch Washing Machine is displaying the error code E1, the control board has detected a fault identified as "Water Intake Fault". Understanding the root cause helps you avoid an unnecessary service call.

Owner's Summary

Your Bosch washer detects that water is not coming in fast enough. Bosch machines are equipped with an Aquastop safety hose that automatically cuts off water if it detects a leak — if yours triggered, the hose needs replacement.

Symptoms

Bosch washer not filling, stops at start of program, E1 or F01 displayed

Common Causes

Water tap closed or water pressure too low
Inlet hose kinked or filter blocked
Defective Aquastop safety hose
Faulty water inlet valve

How to Fix

1 Open water supply tap fully
2 Clean inlet hose filter screens at connection point
3 Inspect Aquastop hose — if triggered replace it
4 Replace water inlet valve if all above checks pass

Tools You'll Need

Pliers Soft Brush Towels / Bucket Flashlight

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

Bosch's control module monitors fill rate via the pressure sensor frequency shift. If target drum level is not reached within the programmed fill timeout, the module logs E1 and interrupts the inlet valve solenoid circuit.

Is It Safe to Keep Using?

Safe to leave off. If Aquastop triggered due to a leak, address the underlying leak before resetting.

Technician's Pro Tip

Check the grey Aquastop hose for a red indicator window — if the window is red or orange, it has triggered and water is blocked permanently by the float valve inside. This hose must be replaced — it cannot be reset.

Related Codes

E2 — Samsung Washing Machine

Water Supply Error

High

4E — Samsung Washing Machine

No Water Supply Detected

High

5E — Samsung Washing Machine

Drain Error — Water Not Draining

High

Frequently Asked Questions

What does error code E1 mean on a Bosch Washing Machine?

Code E1 on a Bosch Washing Machine indicates "Water Intake Fault." In practice, the most common trigger is water tap closed or water pressure too low. Severity is rated high, and typical repair costs range from $0 to $180.

Can I fix E1 myself, or do I need a technician?

Many cases of E1 can be resolved without a technician. The first step to try: open water supply tap fully. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my washing machine with code E1 showing?

Safe to leave off. If Aquastop triggered due to a leak, address the underlying leak before resetting.

How much does it cost to repair E1 on a Bosch Washing Machine?

Repair costs for code E1 typically range from $0 to $180. Tap/filter check: $0; Aquastop hose: $30–$80; Inlet valve: $50–$180. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $180

Tap/filter check: $0; Aquastop hose: $30–$80; Inlet valve: $50–$180