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ErrBase

Bosch E09: Heating Element Not Working

Quick Answer

Bosch E09 means the heating system failed to reach target temperature. Most Bosch models use a flow-through heater (not an exposed element) - test it with a multimeter before ordering: 20-30 ohms is good, open circuit means it is burned out. Test the NTC temperature sensor first (should read 10,000-12,000 ohms at room temp) since it costs under $25 vs $80-120 for the heater.

Bosch E09 means the heating system failed to bring water to the target temperature. Most modern Bosch dishwashers use a flow-through heater (inline heater) rather than a traditional exposed element, and this component is the primary suspect. Dishes coming out cold, wet, and with food residue are the clearest symptoms. Test the heater with a multimeter before ordering parts: it should read 20-30 ohms. An open circuit means replacement is needed.

BoschDishwasherSeverity: highDifficulty: advanced78% DIY Success
Time to Fix
60–240 min
Difficulty
advanced
Parts Cost
$15 – $160
Tools Needed
Multimeter, Torx T20 screwdriver
Wrong code?

Not seeing E09 on your display?

Select what your appliance is actually doing and we'll take you to the right guide.

NTC thermistor reading out of range
E11
heating timeout during wash cycle
H01
poor wash quality and drainage
E22
temperature sensor failure
MieleF01
water not heating to target temperature
Kitchenaid6-3

What Does the E09 Code Mean?

Unlike older dishwashers that use a coil element on the tub floor, Bosch dishwashers from approximately 2010 onward use a flow-through heater mounted outside the tub. Water flows through this heater as it circulates, rather than being heated in the tub. This design is more efficient but also means the heater is not user-visible. E09 can also be triggered by a failed NTC temperature sensor that incorrectly reports the water as cold even when the heater is working.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Failed flow-through heater element40%
Failed NTC temperature sensor giving false cold reading24%
Wiring harness break between heater and control board14%
Lime scale buildup inside flow-through heater reducing efficiency12%
Control board relay for heater circuit failed10%

Symptoms You May Notice

  • E09 displayed during wash or heated dry phase
  • Dishes coming out cold and wet after cycle
  • Food residue remaining on dishes despite full cycle
  • Glasses showing white film from cold water wash

Can you reset a Bosch dishwasher to clear the E09 code?

E09 will not clear with a simple reset if the heater or NTC sensor has failed. After replacing the component, hold Start/Reset for 5 seconds to clear the stored error.

Tools Required for Diagnosis

MultimeterTorx T20 screwdriverSocket setElectrical contact cleaner

Diagnostic Checklist

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

1

Check incoming water temperature

Run the hot water at the kitchen sink for 60 seconds before starting the dishwasher. This primes the hot water line. Cold incoming water (below 120F) can cause H01 (heating timeout) but not usually E09. If E09 only appears occasionally, check your home water heater temperature setting - it should be set to 120F minimum.

2

Test the NTC temperature sensor

3

Test the flow-through heater resistance

4

Check heater wiring harness connectors

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
Flow-Through Heater Assembly00674541 · $85–$160
NTC Temperature Sensor00165258 · $15–$30

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $88 (Parts) vs $650 (New Machine)

Frequently Asked Questions

Can I still run my Bosch dishwasher with E09?
You can technically run a cycle, but the dishes will not be cleaned or sanitized properly. Cold water washes leave food residue, bacteria, and detergent film on dishes. It is best to resolve E09 before continued use, especially if you rely on the dishwasher for sanitizing baby items or cookware.
How much does a Bosch flow-through heater replacement cost?
The flow-through heater assembly (OEM part 00674541) costs $85-$160 for the part alone. A technician will typically charge $150-$300 for labor, bringing the total repair to $235-$460. Given that a new Bosch dishwasher starts at $400-$500, the repair is worth doing if the unit is under 8 years old and otherwise in good condition.
Does E09 affect drying performance?
Yes. Bosch dishwashers use heated water and residual heat from the wash cycle to dry dishes. On models without a separate drying element, the flow-through heater is the only heat source. If the heater has failed, dishes will come out wet even if the cycle completes normally. The AutoAir and CrystalDry features on 500 and 800 series models partially compensate, but E09 will still result in wetter dishes.
How do I test the Bosch heater with a multimeter?
Disconnect power. Access the heater (usually under the unit or from the rear panel). Disconnect both electrical connectors from the heater. Set your multimeter to resistance (ohms). Touch the probes to the two heater terminals. A working heater reads 20-30 ohms. An open circuit (OL or infinity) means the heating element inside has burned through and the heater must be replaced.
Is E09 the same as H01 on a Bosch dishwasher?
No. E09 means the heater has completely failed - it is not producing heat at all. H01 is a timeout code meaning the heater is working but could not raise the water temperature fast enough, usually because incoming water was too cold. If you run the hot water tap for 60 seconds before starting and H01 clears, the heater is fine. If E09 appears, the heater itself has failed.

Related Bosch Dishwasher Error Codes

Code: E11Bosch E11 Error: Temperature Sensor (NTC) FaultCode: H01Bosch H01 Code: Water Taking Too Long to HeatCode: E22Bosch E22 Error: Filter Blocked

Same Fix on Other Brands

Miele dishwasherF01: Miele Dishwasher F01: NTC Sensor FaultKitchenaid dishwasher6-3: KitchenAid Dishwasher 6-3: Heating Error

Same Fix Works on These Brands

Bosch shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience E09 Errors

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

SHPM88Z75N, SHPM88Z55N, SHPK7ZL55N, SHE3AR75UC, SHEM63W55N, SHPM65Z55N, SHE3AR72UC, SHDF78Z55N, SHEM78ZH5N, SHPM98Z75N

Last verified for technical accuracy on March 14, 2026