Bosch Washer Not Spinning: EcoSilence Motor and E18 Error

Quick Answer

A Bosch washer that won't spin is often caused by a clogged drain pump or an E18 error code. The most common fix is cleaning the drain pump filter and checking the impeller for obstructions to allow the cycle to continue.

When a Bosch throws the E18 and quits spinning, nine times out of ten there's a sock or a chunk of lint jamming the pump impeller. I've cleared this thing out on at least a dozen Bosches in the last couple months alone. Ignore it too long and the motor control board starts seeing voltage spikes it doesn't like, and now a $15 filter cleaning turns into a $200 board replacement. Don't let that happen.

BoschWasherSeverity: moderateDifficulty: intermediate75% DIY Success

Time to Fix

15–90 min

Difficulty

intermediate

Parts Cost

$40 – $200

Tools Needed

Phillips #2 screwdriver, Torx T20 screwdriver

Bosch Washer Not Spinning: EcoSilence Motor and E18 Error

OK so here's the deal with Bosch and the not-spinning problem. These machines use what Bosch calls the EcoSilence Drive, which is a brushless DC motor wired directly to the drum. No belt, no carbon brushes to replace, which is honestly great. But the spin cycle won't start if the machine can't drain first, and that's where the E18 comes in. The drain pump filter on these is at the bottom front and it catches everything: coins, buttons, bobby pins, the occasional Lego. Most people never clean it. Ever. So when you show up to fix a Bosch that won't spin, that filter is your first stop, full stop.

Common Causes

Clogged drain pump filter packed with lint, coins, or small clothing items blocking the impeller and triggering the E18 drain error, which then prevents the spin cycle from starting at all.
Door lock PTC thermistor has failed open, so the control board never gets confirmation the door is actually locked, and it won't spin without that signal for safety reasons.
Motor inverter/control module has a fault, usually from moisture intrusion or a power surge, causing it to misread the EcoSilence motor's feedback signals and stop mid-cycle.
Shock absorbers are worn out and the drum is hitting the cabinet during the spin ramp-up, causing the out-of-balance sensor to abort the cycle before it reaches full speed.
Spider arm (the three-pronged bracket that connects the drum to the shaft) has a crack, which is a known issue on some Bosch models from around 2010-2018, and causes severe drum wobble at spin speeds.
Drain pump motor winding has failed, so the pump runs dry or barely moves water, the control board sees a timeout, and it codes out with E18 before attempting spin.

Symptoms You May Notice

The drum just stops partway through the cycle, sometimes with water still sitting in the tub and no error code displayed yet.
E18 shows on the display and the machine refuses to advance past the drain portion of the cycle, door stays locked.
You can hear the motor trying to spin up, it gets maybe 2-3 seconds into it, then cuts out and starts draining again, like it's restarting the drain phase over and over.
Really loud banging or clunking during any attempt at spin, then the machine just gives up and drains, leaving wet clothes behind.
Clothes come out soaking wet but the cycle says it finished, which means it completed a low-speed drain tumble but never hit actual spin RPMs.

Can you reset a Bosch washer to clear the NOT-SPINNING code?

After fixing whatever caused the issue, here's how to reset a Bosch washer. Unplug it from the wall for at least 60 seconds, not just 10, a full minute. Plug it back in. Turn the program dial to the 9 o'clock position (reset/drain position on most models) and press Start. Let it run through a short drain cycle. If the E18 is cleared, the display should go back to normal. Then select a short cycle like Quick Wash and run it to confirm spin is working before doing a real load.

Tools Required for Diagnosis

Phillips #2 screwdriverTorx T20 screwdriverFlathead screwdriverDigital multimeterShallow drain pan or old cookie sheetTowels (seriously, a lot of them)Needle-nose pliersWork gloves

Service / Diagnostic Mode

Press and hold the Start button for 5 seconds until the display shows a service code. Then turn the program dial one click clockwise for each test. Not all Bosch models support this sequence, check your specific model's service manual. Some 800-series units require pressing Spin + Rinse simultaneously for 3 seconds.

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range20–30 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Bosch Door Lock AssemblyModel-specific · $40–$80	Model-specific	$40 – $80
Bosch Motor InverterModel-specific · $100–$200	Model-specific	$100 – $200

Frequently Asked Questions

How much does Bosch washer not spinning repair cost?

Drain pump filter cleaning is free if you do it yourself. New drain pump motor is around $45-80 for the part. Door lock assembly runs $50-90. Motor inverter board is usually $120-180. If it's the spider arm and drum, you're looking at $200-350 for parts plus a couple hours of labor, and honestly at that point you should think hard about whether the machine is worth it. A Bosch 500 or 800 series is absolutely worth fixing if it's under 8 years old.

Is my Bosch washer worth repairing?

Bosch washers are genuinely good machines, they're built to last 15+ years if you maintain them. If your machine is under 10 years old and the repair is the pump or door lock, absolutely fix it. If it's the spider arm on a 12-year-old machine and you're looking at $400 in parts plus labor, that's a tougher call. Replacement cost for a comparable Bosch is around $900-1300, so repairs under $400 usually make financial sense.

Can I fix this myself?

Cleaning the pump filter? Yes, anyone can do that in 10 minutes. Replacing the door lock or shock absorbers? Pretty doable with basic tools and a YouTube video for your specific model. Motor inverter board swap is intermediate level, not hard but you need to be comfortable with electrical connectors and careful about static discharge. Spider arm replacement means tearing down most of the machine, that's a full afternoon job and not for beginners. Know your limits.

Why does my Bosch washer keep showing E18?

E18 means the machine timed out trying to drain. If it keeps coming back after you've cleaned the filter, the pump motor itself is probably failing. The impeller might spin freely but the motor winding is weak and can't move enough water under load. Test the pump motor resistance, you're looking for around 20-30 ohms across the terminals. Anything way outside that range, or an open circuit, means a new pump. They're not expensive and they bolt right in.

My Bosch washer makes a loud noise then stops spinning, what is that?

That banging and then stopping is almost always the out-of-balance protection kicking in. Could be a heavy uneven load, try redistributing the clothes and running spin again. But if it happens on normal balanced loads, check those shock absorbers. A worn shock lets the drum hit the cabinet walls during spin ramp-up, the vibration sensor sees it as out of balance, and the machine aborts. It's a really common issue on machines that are 5+ years old and have done a lot of heavy laundry.

What are the most common Bosch washer models that have this spinning problem?

Honestly all Bosch front-loaders can get this, it's not model-specific so much as it's a maintenance issue. But the spider arm cracking issue tends to show up more on WAE and WAT series from around 2012-2016. The 800 series (WAW285H2UC) has more robust components overall. If you've got an older WFMC series from before 2010, those are getting pretty long in the tooth and parts are getting harder to find.

Models Known to Experience NOT-SPINNING Errors

This repair applies to most Bosch washers with this error code. Common model numbers include:

WAW285H2UC, WAT28402UC, WGA12400UC, WAE24460UC, WFMC3301UC, WAS24460UC, WFVC3300UC, WAT28402UC/01

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026