Bosch Series 2 SMU2HVS20E/34 dishwasher not working, no start, E:15, E:24, E:18 error codes

User question

Çalışmıyor ne yapayım

Artificial Intelligence Response

Direct answer to the question

• I understand your message “Çalışmıyor ne yapayım” means “It’s not working—what should I do?”. If this is about your Bosch Series 2 dishwasher (SMU2HVS20E/34), start with these quick checks:
  • Verify power: outlet/GFCI/breaker on; test the outlet with a lamp.
  • Close the door firmly; ensure the latch clicks. Disable child lock if active.
  • Select a program and press/hold Start for ~3 seconds to cancel/initialize, then start again.
  • Open the water tap fully; confirm the inlet hose isn’t kinked and the machine shows no E:18/E:17/E:24/E:25/E:15 code.
  • Clean the sump filters and ensure the drain hose/air-gap/garbage disposer knockout are clear.
• Important: Salt and rinse-aid warning lights do not prevent Bosch dishwashers from running; they affect performance, not basic operation.

Detailed problem analysis

• Symptom A: No power, dark display

  • Likely causes: tripped breaker/GFCI, dead outlet, loose power cord/terminal block, failed EMI filter or control module.
  • Actions:
  • Test outlet with another appliance. If GFCI protected, press RESET.
  • Cycle the dedicated breaker OFF → ON.
  • If accessible and you’re competent, isolate power and check the dishwasher terminal block for heat damage/loose screws.
  • If supply is present but UI is dead, suspect UI board or power module—service recommended.

• Symptom B: Lights on but won’t start

  • Likely causes: door not latched, child lock active, previous program not canceled, Start button not held long enough, defective door switch.
  • Actions:
  • Confirm a program is selected; press/hold Start ~3 s to cancel; wait pump stop; reselect; press Start briefly.
  • Check for a key/lock icon; follow manual to toggle control lock (often press/hold a marked button ~3–5 s).
  • Gently press on the door near the latch while starting; if it starts, the latch/micro‑switch or hinge alignment needs adjustment/replacement.

• Symptom C: Fills poorly or not at all, then stops

  • Likely causes: closed tap, clogged inlet screen, AquaStop hose triggered, low pressure, faulty inlet valve (coil open), E:18/E:17.
  • Actions:
  • Open the water tap fully; straighten hose; clean the small mesh filter at the valve/hose.
  • After starting, within 30–60 s you should hear water entering. If only humming occurs, the valve may be blocked or not energized.
  • Electrical check (only if qualified): inlet valve coil typically measures a few kΩ. An open coil or no 120/230 VAC when commanded indicates a fault.

• Symptom D: Doesn’t drain; stops mid‑cycle; E:24/E:25

  • Likely causes: clogged sump filter, blocked impeller (glass/seeds), hose kink, disposer knockout not removed, blocked air gap.
  • Actions:
  • Remove and rinse the three‑piece filter set; inspect the pump impeller cavity with a flashlight.
  • Ensure drain hose rises in a high loop and then to the sink drain/air gap; remove disposer knockout if recently installed.
  • Run a drain/cancel: listen for steady pump noise and observe discharge at the drain.

• Symptom E: Base leak/anti‑flood active; continuous pump; E:15

  • Likely causes: water in base pan lifting the float switch (leak from hose, heat exchanger, door gasket).
  • Actions:
  • Unplug power and close water tap. Do not bypass the float.
  • If a small spill caused it, carefully tilt the unit slightly forward to evacuate water from the base pan and let it dry 24 h; then monitor closely. If E:15 recurs, find and fix the leak (inspect inlet hose joints, circulation pump seal, heat‑exchanger manifold, door seal).

• Symptom F: Stops with heating errors; poor drying; E:09/E:11

  • Likely causes: flow heater/NTC faults, limescale on heater, wiring issue.
  • Actions:
  • These require electrical diagnosis (live tests and resistance checks); typically a service job.

• Clarification about the red arrows/salt indicator

  • The “S”/salt and rinse‑aid indicators remind you to refill consumables. They do not inhibit starting or running. Lack of salt may reduce washing quality in hard water but is not a “no‑run” fault.

Current information and trends

• Bosch Series 2/4/6 share common E:xx diagnostics (e.g., E:15 leak, E:24 drain, E:18 inlet). Anti‑flood float switches and AquaStop hoses are now standard, meaning “doesn’t start” is often protective behavior rather than a dead failure.
• Increased use of electronic door latches and control locks makes latch/lock states a frequent cause of “won’t start” reports.
• Many models require a long press of Start to cancel/initialize, which users sometimes miss.

Supporting explanations and details

• Control logic prevents start if:
  • Door‑closed signal = false.
  • Prior cycle state not cleared.
  • Water protection active (float/AquaStop).
• Hydraulic constraints (blocked filter/air gap) cause immediate or early stop because the controller times fill/drain events and raises E:18/E:24 if not met.
• Electrical: A dark UI with a good outlet commonly traces to the noise filter/terminal block or the low‑voltage supply on the control board.

Ethical and legal aspects

• Safety first: isolate mains and close the water tap before removing panels or accessing internal components.
• Warranty: opening the door skin/base tray or modifying wiring may void warranty. If the unit is under warranty, prefer authorized service.
• Water damage risk: repeated E:15 events should not be cleared without locating the leak source.

Practical guidelines

• 10‑minute triage checklist: 1) Test outlet/GFCI and breaker; power‑cycle the machine at the breaker for 2 minutes. 2) Open water tap fully; check for hose kinks. 3) Clean filters; check drain hose routing and disposer knockout. 4) Disable child lock; select Quick cycle; press/hold Start ~3 s to cancel; then press Start to run. 5) Observe: filling sound within 60 s? Draining sound on cancel? Any E:xx code?
• If you see an error code, note it exactly (e.g., E:15, E:24) and share it; diagnostics become targeted.
• Tools that help: flashlight, towels, small Torx driver, multimeter (for qualified users), bucket to test drain discharge.

Possible disclaimers or additional notes

• Model variations exist within Series 2; button combos for child lock and cancel can differ. If buttons don’t behave as described, consult your exact model’s user manual.
• Electrical measurements should be performed only by competent persons.

Suggestions for further research

• Look up the user manual and error code chart for SMU2HVS20E/34 to confirm button sequences and E:xx meanings.
• If E:15 persists, inspect common leak points: inlet hose unions, heat‑exchanger channel, sump/pump seal, and door gasket.
• Consider a water hardness test and proper salt setting to optimize wash quality after basic operation is restored.

Brief summary

• Most “won’t start” cases trace to power/GFCI, door latch/child lock, uncleared prior program, water protection (E:15), or inlet/drain faults (E:18/E:24). Work through the quick checklist above. The salt/rinse‑aid lights are not start‑inhibiting. Provide any displayed E:xx code and exact symptom (dead UI, fills/no drain, constant pump, etc.) and I’ll give you a precise next step or repair plan.

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.