Bosch Dishwasher Not Heating Water or Leaving Dishes Wet? Heater 00665511 — Fixes No Heat, Cold Wash & Wet Dishes Fast

If your Bosch dishwasher is running full cycles but dishes come out cold, wet, or with food residue that hot water would normally dissolve, the heating element is the most likely cause. In Bosch and Siemens dishwashers, the heater performs two critical functions: heating the wash water to the correct temperature for effective cleaning, and providing the drying heat at the end of the cycle. When it fails, wash performance drops immediately — water stays cold, detergent doesn’t activate fully, and dishes exit the cycle wet and spotted. ⚡ Common failure point in Bosch and Siemens dishwashers across multiple series. Part 00665511 is the genuine OEM replacement heater that restores correct wash water temperature and drying performance to factory specification.

❓ Is This the Right Part?

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

• ✔ Dishwasher powers on and runs full cycles without error codes (or only E09 heater fault code)
• ✔ Wash pump runs normally — water circulates during the cycle
• ✔ Water supply and inlet valve confirmed OK — water enters the tub
• ✔ ONLY problem is water not heating, dishes coming out wet, or poor cleaning due to cold wash water

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

🔧 Common Symptoms

• Dishes come out wet at the end of the drying cycle
• Water in the tub feels cold or lukewarm during or after a wash cycle
• Detergent tablet not fully dissolved after a complete cycle
• Food residue remaining on dishes that hot water would normally remove
• E09 error code displayed on the control panel (heater circuit fault)
• Dishwasher runs but no steam visible when door is opened at end of cycle

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

✔ In most cases, replacing the heater restores correct wash temperature and full drying performance immediately.

📦 Part Details

• Part Number: 00665511
• Type: Dishwasher Heating Element / Flow Heater — Genuine OEM
• Replaces: 665511 — contact us to confirm full supersession chain for your model
• Brands: Bosch, Siemens, Thermador, Gaggenau
• Note: New and Used variants available — see buying options above

⚙️ Installation

Skill Level: MODERATE — 45–75 minutes, basic hand tools required. Disconnect power at the breaker and turn off the water supply before servicing. Access the heater from beneath the dishwasher by removing the lower access panel and tilting the unit forward. Disconnect the wiring harness and water connections from the heater assembly, remove the mounting hardware, install the new 00665511 heater, reconnect all connections, restore power and water, and run a test cycle to confirm correct heating before returning to service.

✓ Compatible Models

Part 00665511 fits a range of Bosch and Siemens dishwasher series. Contact us with your full model number to confirm fitment before ordering — heater part numbers can vary by production run and model suffix.

💡 Pro Tip