C1: Slow / no drain
- Clogged Drain
- Drain Pump
- Air Gap
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 — clean filter, hose & knockout plug
Clean the filter/sump, straighten the drain hose, and confirm a new disposal's knockout plug was removed. Clears most C1 codes.
✅ No part needed — try this firstDrain pump
If everything upstream is clear and it still drains slowly. Buy for 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
- Remove the bottom rack and clean the filter/sump.
- Check the drain hose for kinks and clogs at the high loop.
- If a disposal was just installed, confirm the knockout plug was removed.
⚠️ Doable — know the risk
- Drain pump replacement — moderate; cut power and shut the water off.
🛑 Call a pro — don't touch this
- A leak reaching the wiring/control under the tub.
The Honest Call
Usually worth it — the top causes are free and a drain pump is $30–80 versus a new dishwasher.
In Middle Tennessee or Louisiana?
Don't want to DIY it? Our own family of technicians will come clear that C1 for you — honest flat pricing, usually same-day, 4.5★ from 1,000+ neighbors.
🔧 Get it fixed by our techs →