C2: Drain blocked (repeats)
- Persistent Clog
- Pump
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 — clear the full drain path
Clean the bottom filter, check the drain hose for kinks/clogs, clear the air gap on the counter, and confirm the disposal knockout plug is out.
✅ No part needed — try this firstDrain pump
Only if the entire drain path is clear but it still won't pump out. Match your exact model.
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
- Scoop standing water, then clean the bottom filter and sump.
- Check the drain hose under the sink for kinks and clogs; clear the counter air gap.
- If a disposal was just added, confirm the knockout plug was removed.
⚠️ Doable — know the risk
- Drain pump replacement — power and water off; some water remains in the sump.
🛑 Call a pro — don't touch this
- A leak or a control fault you can't trace after the drain path is verified clear.
The Honest Call
Very worth it — the drain-path clean is free and fixes most C2s; a pump is $40–110 versus a new dishwasher.
In Middle Tennessee or Louisiana?
Don't want to DIY it? Our own family of technicians will come clear that C2 for you — honest flat pricing, usually same-day, 4.5★ from 1,000+ neighbors.
🔧 Get it fixed by our techs →