What does the E10 error code mean on a Bosch dishwasher?

The E10 error code on a Bosch dishwasher means the appliance is not receiving enough water or no water at all during the fill cycle. The dishwasher detects that the required water level has not been reached within the expected time and stops the cycle to prevent damage. This is a water supply issue rather than a drainage problem.

What causes the E10 error on a Bosch dishwasher?

The most common causes of the E10 error include a closed or partially open water supply valve under the sink, a kinked or blocked water inlet hose, a clogged filter screen at the inlet valve connection, a faulty water inlet valve that is not opening properly, or low water pressure from the household supply. In some cases, a frozen inlet hose in colder environments can also trigger this error.

How do I fix the E10 error on my Bosch dishwasher?

Start by checking that the water supply valve under the sink is fully open. Then inspect the inlet hose for kinks, bends, or blockages and straighten it if needed. Disconnect the inlet hose from the back of the dishwasher and clean the small mesh filter screen at the connection point. Check your home's water pressure to ensure it meets the dishwasher's requirements. If these steps do not resolve the error, the water inlet valve itself may need to be replaced by a certified technician.

How is E10 different from E20, E24, and E25 on a Bosch dishwasher?

E10 is a water intake failure that occurs at the beginning of the cycle when the dishwasher attempts to fill with water. E20, E24, and E25 are all drainage-related errors that occur at the end of the cycle when the dishwasher attempts to expel water. If your dishwasher is not filling, the issue is E10. If water is filling but not draining, the issue is likely E20, E24, or E25.

Can I fix the Bosch E10 error myself?

Basic checks such as opening the supply valve, straightening the inlet hose, and cleaning the filter screen can be done at home without special tools. However, if the water inlet valve itself is faulty or if water pressure is consistently low, a certified appliance repair technician should be contacted to carry out a safe and accurate repair.

Does Promix Appliance Repair fix Bosch dishwasher E10 errors in Boston?

Yes. Promix Appliance Repair provides same-day Bosch dishwasher repair services throughout Boston, Newton, Needham, Brookline, Wellesley, and surrounding areas. Our certified technicians are experienced in diagnosing and repairing water supply and inlet valve failures on all Bosch dishwasher models. Call (781) 666-9565 to book a same-day appointment.

(781) 666-9565

E10

Bosch · Dishwasher · Error Code

Bosch Dishwasher E10 Error Code — NTC Temperature Sensor Fluctuation

Tech — Needs Inspection Also shown as: E 10 10

Quick Answer

The E10 error code means the NTC temperature sensor is sending unstable or erratic readings to the control board — the value is fluctuating outside the expected range rather than being completely absent (E12) or open-circuit (E14). A hard reset clears E10 when the cause is a transient spike or moisture on the connector. If it returns, the sensor's wiring harness connection is loose or corroded, or the NTC itself has developed an intermittent internal fault and needs replacement. This is a professional repair.

Time

Technician visit

Difficulty

Professional only

DIY Steps

Hard reset only

Repair Cost

$110–$200

What the E10 Code Means

The NTC (Negative Temperature Coefficient) sensor is a small thermistor mounted in the sump or heating circuit of the dishwasher. Its electrical resistance decreases predictably as water temperature rises, letting the control board calculate the exact water temperature at every point in the wash cycle. The board uses this data to control the heating element, verify sanitization temperatures, and manage the drying phase.

E10 specifically means the NTC is producing a signal — unlike E14 (sensor fully disconnected) or E12 (short circuit) — but that signal is fluctuating erratically outside the range the board considers valid. Imagine a thermometer needle that twitches rather than sitting steady: the board can't trust a reading that jumps unpredictably, so it halts heating and logs the fault.

The most important practical consequence: the dishwasher will not heat water reliably while E10 is active. Cycles may appear to run normally in terms of filling and draining, but dishes will come out cold and unwashed rather than properly cleaned. Do not assume E10 is cosmetic — address it before continuing regular use.

E10 in the NTC Sensor Code Family

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E10

NTC fluctuation

Sensor is connected and sending a signal, but the reading is unstable — jumping erratically outside expected range.

E12

NTC short circuit

Sensor resistance has collapsed to near-zero — wires touching, sensor body shorted internally, or severe water damage on the circuit.

E14

NTC open circuit

Sensor connector is fully unplugged, the wire has broken, or the sensor element has burned open — control board sees no signal at all.

Common Causes — Most Likely First

1

Loose NTC connector — intermittent contact. The multi-pin connector between the NTC sensor and the wiring harness has partially worked loose. Contact is made intermittently, causing the resistance reading to spike and drop unpredictably. The most common cause of E10 specifically (versus E14, which is a clean break). Very common

2

Corroded or moisture-contaminated connector terminals. Water or steam has reached the NTC connector, causing corrosion on the pins that introduces variable resistance in the signal circuit. Can clear temporarily then return as corrosion progresses. Common

3

Failing NTC sensor — intermittent internal fault. The thermistor element inside the sensor has begun to fail. Its resistance becomes unstable under heat or vibration even though it still produces some signal at room temperature. Hard reset clears it temporarily but E10 returns once the machine heats up. Common

4

Damaged wiring harness between NTC and control board. A section of the harness has been pinched, kinked, or chafed against a moving part, causing intermittent signal interruption rather than a clean break. Occasional

5

Control board input circuit fault. The NTC input channel on the main PCB is damaged — it misreads a stable sensor signal as fluctuating. Confirmed only after the sensor and harness are tested and found good. Less common

What You Can Try Before Calling — Step by Step

Perform a hard reset — unplug for a full minute

Turn the dishwasher off and unplug it completely — or trip its circuit breaker. Wait a full 60 seconds. Moisture on the NTC connector or a transient spike in the sensor circuit can trigger E10 once and not return. A complete power discharge clears residual voltage from the sensor circuit before restart.

Note: If E10 appeared after a particularly long or hot cycle, give the dishwasher 15–20 minutes to cool before the hard reset. Thermal stress on an aging NTC sometimes produces a one-off reading spike that clears once the sensor cools.

Run a full wash cycle and monitor the display

After restoring power, run a complete cycle — not a quick rinse. E10 related to NTC fluctuation typically appears once the water heats up (around 8–12 minutes into a wash cycle), not immediately at startup. If the full cycle completes without E10 returning, the fault was transient.

Note when in the cycle the code appears

If E10 returns, record the exact point in the cycle it appears: immediately on start, during the main wash (heating phase), or during the drying phase. This tells a technician which temperature range is triggering the fault and narrows diagnosis significantly. Write this down before calling.

Also note: whether dishes are coming out cold or uncleaned — this confirms the heating element is not running correctly despite the cycle appearing to complete, which points firmly to an active NTC fault rather than a one-time event.

Book a professional diagnostic

If E10 returns after a hard reset, a technician needs to measure the NTC sensor's resistance with a multimeter across the temperature range — typically 25°C (room temp) through 60°C (wash temp). A healthy NTC shows a smooth, predictable resistance curve. A failing sensor shows erratic jumps, confirming replacement is needed. The technician will also check the connector and harness before condemning the sensor itself, since a reseated connector sometimes resolves the fault without any new parts.

When to Call a Technician

All persistent E10 faults require professional service. Call us if:

E10 returns after a full 60-second hard reset and a complete wash cycle
Dishes are coming out cold or poorly washed — the heating element is not running
E10 appears consistently at the same point in the cycle (especially the heating phase)
The code clears after a reset but returns within 1–2 cycles — classic intermittent NTC failure pattern
You see E10 alongside E09 (heating element) — the two faults can be linked and need combined diagnosis

Repair Cost Expectations

Connector Reseat (Labor Only)

$80–$120

If a loose or corroded NTC connector is the cause — no new parts needed. Diagnostic visit plus connector cleaning and reseat. Resolves a meaningful share of E10 cases.

NTC Sensor Replacement

$110–$200

Typical Boston-area cost for NTC thermistor replacement on a Bosch dishwasher — parts and labor. The sensor itself is $20–$45; remainder is labor and diagnostic time.

E10 Keeps Coming Back? We'll Find the Fault.

Same-day appointments across Boston. Certified Bosch technicians with diagnostic tools, common parts on the truck, and a 90-day warranty on every repair.

Book Bosch Dishwasher Repair Call (781) 666-9565

Frequently Asked Questions

What is the difference between E10, E12, and E14?

All three codes involve the NTC temperature sensor but describe different failure modes. E10 means the sensor is connected and producing a signal, but that signal is fluctuating erratically — an intermittent fault. E12 means the sensor circuit has shorted to near-zero resistance, usually from wires touching or severe moisture damage. E14 means the sensor circuit is completely open — the connector is unplugged, a wire has broken, or the sensor element has burned out. E10 is the hardest to reproduce because it comes and goes; E12 and E14 are usually consistent faults.

Can my dishwasher still wash dishes with E10 active?

It will appear to run a cycle — filling, spraying, and draining may all work — but the heating element will not operate reliably because the control board cannot trust the temperature feedback. Dishes will come out cold or inadequately cleaned. Do not use the machine as a substitute for proper cleaning while E10 is active; the wash is effectively cold water only.

Why does E10 clear after a reset but come back?

This is the classic pattern of an intermittent NTC fault. At room temperature the sensor may read within range, passing the startup check and allowing the cycle to begin. Once the water heats up and the sensor reaches operating temperature, the failing thermistor element becomes unstable and the reading drifts out of range, triggering E10 mid-cycle. A reset cools everything down and the cycle starts again — until the same temperature threshold is reached. This cycle of reset-and-return almost always means NTC replacement is needed.

How does a technician test the NTC sensor?

A technician uses a multimeter to measure the sensor's resistance at two or more temperatures — typically room temperature (approximately 10,000 ohms on most Bosch NTCs) and at elevated temperature using hot water (resistance drops predictably as temperature rises). A healthy NTC follows a smooth, consistent curve. An E10-faulty NTC shows erratic jumps or values that fall outside the Bosch specification table for that model. The technician can also wiggle the connector while reading resistance to check for intermittent contact faults.

How much does NTC sensor replacement cost on a Bosch dishwasher?

In the Boston area, NTC thermistor replacement on a Bosch dishwasher typically runs $110–$200 parts and labor combined. The sensor itself costs $20–$45 depending on the model series; the remainder is diagnostic time and labor. If only the connector needs reseating or cleaning, the cost is lower — $80–$120 for the labor visit alone.