Washer · Bosch · 7 min read

Bosch Washing Machine Repair Cost — 300, 500 & 800 Series | Northern Virginia

Quick answer

Bosch washing machine repair in Northern Virginia typically costs $120–$480 depending on the fault and series. A drain pump (E18 error) runs $140–$260. A door boot seal (bellows gasket) runs $150–$280. An EcoSilence Drive motor assembly (800 Series) runs $280–$480. A drum bearing and shaft seal kit runs $280–$480. An i-DOS dosing pump assembly (800 Series) runs $180–$320. A control board runs $280–$480. Against a $900–$2,100 true replacement cost, most single repairs on any Bosch compact washer are clearly worth doing.

Bosch compact 24-inch front-load washing machines — the 300, 500, and 800 Series — are among the most common premium washers in Northern Virginia kitchens and laundry closets, installed during the 2015–2022 condo and townhome renovation wave in Arlington, McLean, Reston, and Bethesda. When a Bosch 800 Series develops a fault — E18 drain failure, residual vibration, a drying inefficiency on condensation models, or an i-DOS dosing error — the first question is whether to repair or replace a compact washer that costs $900 to $2,100 to replace installed. This guide gives part-by-part repair cost ranges for all three Bosch compact washer series, explains the Bosch-exclusive components — AquaStop supply hose, EcoSilence Drive motor, i-DOS dosing system — that make some Bosch washer repairs different from a standard front-load service, and works through the repair-vs-replace math at each price point.

Why Bosch washing machine repair costs more than a standard washer

Bosch 300, 500, and 800 Series compact washers share three design features that add cost and specificity to service versus a standard residential front-loader. (1) AquaStop 2-layer supply hose. Every Bosch washer ships with the same proprietary AquaStop supply hose used on Bosch dishwashers — a 2-layer hose with a flood-detection sensor integrated into the connector housing at the appliance end. When the AquaStop hose fails (kinked hose body, cracked connector, or a tripped flood sensor that will not reset), the COMPLETE AquaStop hose assembly must be replaced. A standard aftermarket washing-machine supply hose physically connects but bypasses the flood sensor, removing a safety feature Bosch built into the installation spec. OEM AquaStop hose assembly is the correct repair. AquaStop assembly replacement: $100–$180. This constraint is shared with Bosch dishwashers but is 0 nationally documented for Bosch washers in non-Bosch-specialist guides. (2) 24-inch compact drum geometry — OEM boot seal required. Bosch compact washers use a 24-inch drum format with a door boot seal (bellows gasket) calibrated to the smaller drum diameter and the specific door glass lip geometry. Aftermarket 24-inch boot seals from generic suppliers often do not reproduce the compression depth at the door glass lip — the seal installs but allows a slow water seep during high-spin cycles that appears to be a 'slow leak' with no obvious source. OEM Bosch boot seal is required for a lasting repair. Boot seal replacement: $150–$280. Stacked laundry closet installations common in Northern Virginia condos (Arlington, Reston, Bethesda high-rises) increase boot seal labor by 20–30 minutes because the washer must be partially pulled from the stack to access the front panel without risking the stacked dryer above. (3) EcoSilence Drive brushless motor and i-DOS dosing system (800 Series). Bosch 800 Series washers use an EcoSilence Drive brushless DC motor with ceramic bearings — the same motor platform as Bosch 800 Series and Benchmark dishwashers. When ceramic bearing wear produces low-frequency vibration at high spin (1,400 RPM), the motor assembly replaces as a unit; bearings cannot be sourced independently. EcoSilence Drive motor assembly: $280–$480. The 800 Series WGG24401UC also includes i-DOS: an automatic liquid detergent and softener dosing system using a refillable cartridge holder and a precision dosing pump calibrated to water hardness. When i-DOS fails — producing a dosing error code or visible underdosing — the dosing pump assembly is Bosch-specific (no aftermarket equivalent) and replaces as a unit. NVA water note: Northern Virginia municipal supply runs 180–230 ppm in Fairfax County and McLean service areas (moderate-to-hard). This hardness accelerates scale deposition on EcoSilence Drive ceramic bearings (via wash-water micro-spray over years) and on the pressure switch sensor tube — the most common cause of false water-level faults on Bosch washers in NVA that have not had annual descaling.

Bosch washing machine repair costs — part by part

These are realistic installed cost ranges — part plus labor — for Northern Virginia Bosch 300, 500, and 800 Series washing machine repairs in 2026. Diagnostic fee: $99–$149, credited toward repair. (1) Drain pump — the pump that evacuates water from the drum at the end of each rinse phase. Bosch washer drain pump failure presents as an E18 error (drainage fault) with water remaining in the drum at cycle end. The coin and fluff filter (homeowner-cleanable) resolves most E18 faults; when the pump impeller or motor has failed, pump replacement is required. Drain pump replacement: $140–$260 parts and labor. (2) Door boot seal (bellows gasket) — the rubber bellows that seals the drum opening to the door glass. Boot seal failure produces water pooling on the laundry closet floor, typically at the front base of the machine during or just after the wash cycle. OEM Bosch 24-inch boot seal only — see above for why aftermarket seals fail. Boot seal replacement: $150–$280. (3) EcoSilence Drive motor assembly (800 Series) — the brushless DC motor with ceramic bearings producing 1,400 RPM spin. Replacement required when bearing wear produces persistent vibration at high spin or motor failure stops the spin cycle. OEM EcoSilence Drive motor assembly: $280–$480. (4) Drum bearing and shaft seal kit — the main drum bearings and rear shaft seal. Drum bearing failure produces a loud rumble or grinding noise during the spin cycle that grows louder over weeks. Replacement requires full drum disassembly — typically 3–4 hours labor — making this one of the more expensive washer repairs. Drum bearing kit replacement (parts and labor): $280–$480. (5) Water inlet valve — the solenoid valve controlling fill. Valve failure produces slow fill, no fill, or an E17 (water supply) error. Single or dual valve depending on model; replacement: $120–$200. (6) Pressure switch (water level sensor) — the electronic sensor measuring drum water level. Scale-coated sensor tubes are the most common cause of false E-series error codes on NVA Bosch washers with no other mechanical fault; in hard-water areas, annual descaling of the sensor tube extends sensor life. Pressure switch replacement: $100–$180. (7) Shock absorber pair — the two absorbers dampening drum movement during spin. Failed absorbers produce excessive drum contact with the cabinet, a loud banging at any spin speed, and possible E-series codes from the unbalanced-load sensor triggering on what is actually a mechanical fault. Shock absorber pair replacement: $120–$220. (8) AquaStop supply hose assembly — see above. OEM only. Replacement: $100–$180. (9) i-DOS dosing pump assembly (800 Series WGG24401UC) — the precision pump delivering metered liquid detergent and softener. Dosing pump failure presents as an i-DOS error code on the display or as consistently underdosed wash cycles with residue on fabrics. OEM Bosch dosing pump assembly: $180–$320. (10) Control board — manages all wash, spin, and program functions. Board failure presents as programs that do not start, a machine that halts mid-cycle, or persistent error codes after all component faults are resolved. Control board replacement: $280–$480. HomeConnect Wi-Fi function (800 Series) requires a HomeConnect-compatible replacement board on WGG24401UC and similar HomeConnect-enabled models. (11) Door latch assembly — $80–$150. A failed latch produces a washer that won't start (door-open fault) with no fill, no spin, and typically no error code — the control board does not register the door as closed. (12) Carbon brush set (older 300 Series with brushed motor) — $60–$120. Pre-2018 Bosch compact washers may use a brushed motor requiring periodic brush replacement at 3,000–5,000 wash cycles. Brush wear produces sparking at the motor commutator, reduced spin torque, or E-series motor fault codes.

Bosch 300 vs 500 vs 800 — series differences and service impact

The three Bosch compact washer series sold in Northern Virginia differ in motor technology, dosing capability, connectivity, and spin speed — differences that directly determine which repair components apply. (1) Bosch 300 Series (representative model: WAXH2090UC, 1,200 RPM spin, 24 dBA). Standard motor (not EcoSilence Drive on early models), no i-DOS, no HomeConnect. The 300 Series service profile is the simplest: drain pump, door boot seal, drum bearing kit, water inlet valve, pressure switch, shock absorbers, door latch, and control board. On pre-2018 300 Series with a brushed motor, brush replacement is an additional service item. True replacement cost for a Bosch 300 Series: $900–$1,300 installed in NVA. (2) Bosch 500 Series (representative model: WAT28401UC, 1,400 RPM spin, 24 dBA). EcoSilence Drive brushless motor on current production, condensation drying on the matching 500 Series dryer, no i-DOS, no HomeConnect. Service profile adds EcoSilence Drive motor assembly vs 300 Series. True replacement cost: $1,100–$1,600 installed. (3) Bosch 800 Series (representative model: WGG24401UC, 1,400 RPM spin, 24 dBA, i-DOS, HomeConnect). EcoSilence Drive motor, i-DOS automatic dosing system, HomeConnect Wi-Fi (Home Connect app), SpeedPerfect and ActiveWater Plus modes. Service profile adds i-DOS dosing pump assembly and HomeConnect-compatible control board requirement vs 500 Series. True replacement cost: $1,400–$2,100 installed. (4) Stacked laundry closet installations. Bosch compact washers are frequently installed in stacked laundry closets — washer below, matching Bosch dryer above — in NVA condos (Arlington, Reston, Bethesda, McLean utility rooms). Access to the front panel (door boot seal, drain pump, filter) requires pulling the washer partly from the stack with the dryer still in place: 20–30 minutes additional labor per visit. We carry dedicated equipment for stacked stack separations that avoids dryer damage. (5) Pedestal installations. Some Bosch 300 and 500 Series washers are installed on Bosch pedestal bases (WSTACC27WSST) for ergonomic loading height. Pedestal removal is required for any service requiring front panel access; add 15–20 minutes labor per visit.

Bosch washing machine repair vs replace — the repair math

The repair case for a Bosch compact washer is strong at virtually any age on the 800 Series and solid on the 500 Series for all but the oldest units with multiple simultaneous faults. True replacement cost is the correct denominator — unit price plus NVA installation. NVA installation for a front-load washer (disconnect, haul-away, reconnect, level, test run) runs $150–$300. Stacked installations add $100–$150 for stack separation and reassembly. Pedestal installations add $60–$100 for pedestal removal and reinstallation. Bosch 300 Series: $900–$1,300 true installed replacement cost. A drain pump at $260 is 20–29% of replacement — clearly worth doing. A door boot seal at $280 is 22–31% — worth repairing. A drum bearing kit at $480 is 37–53% — the one scenario on a 300 Series older than 12 years where the repair-vs-replace decision deserves a second look, particularly if other components are also aging. A drain pump plus door boot seal at the same visit ($260 + $280 = $540) is 42–60% of replacement — replacement is rational here on a 300 Series older than 12 years where the drum bearings may also be near end of life. Bosch 500 Series: $1,100–$1,600 true installed replacement cost. A drain pump at $260 is 16–24%. An EcoSilence Drive motor at $480 is 30–44%. A drum bearing kit at $480 is 30–44%. Even a motor plus bearing kit ($960 combined) is 60–87% of the $1,100 minimum replacement cost — replacement is rational here on a 500 Series older than 12 years, but repair remains clearly correct on any single fault under 10 years. Bosch 800 Series: $1,400–$2,100 true installed replacement cost. A drain pump at $260 is 12–19%. An EcoSilence Drive motor at $480 is 23–34%. An i-DOS dosing pump at $320 is 15–23%. A control board at $480 is 23–34%. All single faults are well under 30% of replacement at any age. Even a motor plus control board at the same visit ($960) is 46–69% — approaching the threshold only at the high end of a two-component repair on the cheapest 800 replacement, and still below 35% single-fault on any single item. For single faults, the 800 Series is decisively worth repairing. Stacked installation caveat: the additional $100–$150 stacked-install service premium narrows the repair-vs-replace gap slightly on 300 Series older than 12 years with multiple faults, but has no meaningful impact on the 800 Series or any repair under $400.

When to Call a Specialist

Homeowner-accessible Bosch washer maintenance: clean the coin and fluff filter monthly (access panel at bottom front — see our E18 guide for step-by-step), descale the detergent drawer quarterly with hot water to prevent calcification, and run a monthly hot maintenance wash (drum clean cycle or 90°C cotton program) to prevent odor from residual moisture in the drum seal. All other Bosch washer service — drain pump, door boot seal, EcoSilence Drive motor, drum bearing kit, i-DOS dosing pump, control board, shock absorbers — requires a trained technician with Bosch-specific tools and OEM parts. On stacked laundry closet installations, pulling the washer from under a stacked dryer without proper equipment risks damage to both units. Commonwealth Appliance Repair services Bosch 300, 500, and 800 Series compact washing machines across McLean, Great Falls, Vienna, Arlington, Reston, Falls Church, Alexandria, Fairfax, Bethesda, Chevy Chase, Potomac, Washington DC, and all of Northern Virginia. OEM Bosch drain pumps, door boot seals, and EcoSilence Drive motor assemblies available for same-visit repair on most faults. Stacked and pedestal Bosch installations serviced with dedicated stack-separation equipment — no dryer damage. Flat-rate diagnostic $99–$149, credited toward repair. Written upfront quote before any work begins. 90-day parts and labor warranty. Call (571) 571-1664.

Call (571) 571-1664 Washer Repair in NoVA & DC

Frequently Asked Questions

How much does Bosch washing machine repair cost in Northern Virginia?

Bosch washer repair in NVA: drain pump $140–$260, door boot seal $150–$280, EcoSilence Drive motor (800 Series) $280–$480, drum bearing kit $280–$480, i-DOS dosing pump (800 Series) $180–$320, control board $280–$480. Diagnostic $99–$149, credited toward repair. Written upfront estimate, 90-day warranty. Call (571) 571-1664.

What is Bosch AquaStop on a washing machine and why does it cost more to replace?

AquaStop is Bosch's 2-layer flood-protection supply hose with an integrated flood sensor at the appliance connector. When it fails, the COMPLETE AquaStop assembly must be replaced — OEM only. Aftermarket hoses bypass the flood sensor, removing Bosch's built-in protection. AquaStop assembly replacement: $100–$180. Call (571) 571-1664.

My Bosch washer shows E18 — how much does drain pump repair cost?

A Bosch E18 error usually means a clogged coin-and-fluff filter — clean it first (free, 10 minutes, no tools). If E18 persists after a clean filter, the drain pump has failed. Drain pump replacement runs $140–$260 parts and labor — clearly worth doing on any Bosch model. Flat-rate diagnostic credited toward repair. Call (571) 571-1664.

Is a Bosch 800 Series washing machine worth repairing?

Yes — for virtually any single fault. A Bosch 800 Series costs $1,400–$2,100 installed to replace. An EcoSilence Drive motor at $480 is 23–34% of replacement. A control board at $480 is 23–34%. Both are clearly worth repairing. Even two simultaneous faults under $900 are worth repairing on an 800 Series under 12 years old. Call (571) 571-1664.