E09: Flow-through heater fault
- Heating Element/Heat Pump
- Wiring
The Tools to Test + Fix With
You don't need a shop full of tools — you need these. The multimeter is the one that pays for itself the first time it stops you buying the wrong part on a fault code.
Digital multimeter
Test a suspect part for continuity BEFORE you buy — the single best way to avoid replacing the wrong thing on a fault code.
🔎 On Amazon →Nut driver set (¼" + 5⁄16")
Most appliance panels are held on with ¼" and 5⁄16" hex screws.
🔎 On Amazon →Screwdriver set (Phillips/flat/Torx)
Covers the odd panel screw and the Torx fasteners many brands use.
🔎 On Amazon →The Fix — Free Checks First, Then the Part
Work top-down: the free checks before you spend a dime, and test to confirm the part is actually bad before you buy. When it is a part, you get both options — the genuine OEM part sourced through us and shipped to your door, or a budget aftermarket part on Amazon. Your call.
No part — check the heater connector
Power off, tip the machine, and inspect the heat-pump connector for heat damage or a loose fit. Rarely the whole fix, but free to rule out.
✅ No part needed — try this firstHeat pump / heating element
The usual E09 part — it's under the tub, so it's a bigger job. Match your exact model number.
Prices shown are typical aftermarket ranges and vary by brand and model — genuine OEM is priced by quote when you request it. Amazon links open a search so you can match your exact model number; as an Amazon Associate, Appliance Ant may earn from qualifying purchases at no extra cost to you. Always confirm the part fits your model.
Safe to Try · Know the Risk · Call a Pro
General guidance, not professional advice. Always unplug the appliance (or shut off the gas/water) before you check anything. If it feels beyond you, that's exactly when to get a pro.
✅ Safe to try yourself
- Confirm the symptom: cold water and dishes not drying.
- With power off, check the heat-pump connector for burn marks or looseness.
⚠️ Doable — know the risk
- Heat pump / element replacement — a hands-on under-the-tub job; comfortable DIYers only, power and water off.
🛑 Call a pro — don't touch this
- The heat-pump swap if you're not comfortable laying the machine over and pulling the sump — and any wiring fault you can't trace.
The Honest Call
Borderline — the part is $90–220 but it's labor-heavy. Worth it on a newer Bosch you like; on an old unit, weigh it against replacement.
In Middle Tennessee or Louisiana?
Don't want to DIY it? Our own family of technicians will come clear that E09 for you — honest flat pricing, usually same-day, 4.5★ from 1,000+ neighbors.
🔧 Get it fixed by our techs →