Bosch Dishwasher Not Heating? Heat Pump Assembly 12008381 – Fix E09 Error Fast

If your Bosch dishwasher is throwing an E09 error, not heating water, or leaving dishes dirty and wet, the heat pump assembly is the most common cause. In most Bosch-built dishwashers, the integrated heat pump circulates and heats water simultaneously — when it fails, the machine stops mid-cycle, dishes come out cold and unclean, and error codes E09 or E25 appear. ⚡ Common failure point in Bosch SHE, SHP, SHX, SHV, and SHEM series dishwashers. Part 12008381 is the genuine OEM replacement that restores full heating and circulation in one direct-fit assembly — no modification required.

❓ Is This the Right Part?

This is the correct fix if ALL of the following are true:

• ✔ Dishwasher powers on and runs a cycle normally
• ✔ Water fills correctly and drain pump works
• ✔ Water supply and inlet valve confirmed OK
• ✔ Control board shows no unrelated fault codes
• ✔ ONLY problem is E09 error, no heat, or poor wash/dry performance

Not sure? Send us your model number — we'll confirm before you order.

🔧 Common Symptoms

• E09 error code — most common, what customers search for
• E25 error code — pump blockage or heat pump fault
• Dishes not drying — no heat generated during cycle
• Dishes coming out dirty or with residue — insufficient water temperature
• Dishwasher stops mid-cycle — thermal protection triggered
• No spray pressure — circulation pump failure within assembly
• Burning smell or unusual noise from pump area

✔ If these symptoms match, this is the most likely failed component in the system.

✔ In most cases, replacing this heat pump assembly restores normal operation immediately.

📦 Part Details

• Part Number: 12008381
• Type: Integrated heat pump assembly — circulation pump + in-line heater combined unit
• Replaces: OEM direct-fit heat pump assembly — supersedes 901.141.944, 9001141944, 9001.141.944, 00705174, 00655250, AP5988445, EAP11724988, PS11724988 (no modification required)
• Brands: Bosch, Thermador, Gaggenau
• HS Code: 850990 | Origin: Canada

⚙️ Installation

Skill Level: ADVANCED — 60–90 min DIY / 45–60 min Professional. Disconnect power and water supply before beginning. Remove the lower spray arm, filter basket, and sump cover to access the pump assembly; disconnect the wiring harness and hose clamps before unbolting the unit. Torque mounting bolts to spec and ensure all hose clamps are fully seated before reassembly — leaks at the pump housing are the most common post-install issue.

💡 Pro Tip

SHEM3AY55N/24, SHE3AR75UC/24, SHEM63W55N/01, SHEM3AY55N/25, SHE3AR75UC/23, SHE3AR76UC/24, SHEM3AY55N/01, SHEM78Z55N/01, SHE53T56UC/01, SHV7PT53UC/04, SHV7PT53UC/02, SHX5ER55UC/87, SHE9PT55UC/87, SHP68T55UC/01, SHE9PT55UC/B3, SHX68T52UC/01, SHX5ER55UC/93, SHEM63W55N/10, SHE3AR76UC/25, SHP865ZD5N/01, SHEM63W55N/11, SHE3AR76UC/22, SHE3AR76UC/26, SHE3AR72UC/22, SHEM63W56N/01, SHE68T52UC/01, SHE53TL6UC/02, SHS63VL2UC/01, SHX8PT55UC/02, SHE53T55UC/01, SHP865ZD2N/01, SHV68T53UC/01, SHX9PT75UC/01, SHV68T53UC/04, SHE3AR75UC/22, SHE3AR72UC/25, SHP878ZD5N/01, SHEM63W55N/13, SHE3AR75UC/25, SHE3AR72UC/24, SHP65T56UC/02, SHX68T56UC/02, SHE878ZD5N/01, SHEM63W52N/01, SHE68T55UC/01, SHX53TL5UC/01, SHE68T55UC/03, SHE53T52UC/02, SHP53T55UC/02, SHS63VL5UC/01

✓ Model-Specific Repair Pages