Whirlpool dishwasher / drain system
Whirlpool Dishwasher Not Draining: Causes, Checks, and Repair Cost
A Whirlpool dishwasher that will not drain may have a clogged filter, blocked hose, air gap issue, or garbage disposal knockout problem.
Quick answer
What it means
A Whirlpool dishwasher that will not drain often starts with filter cleaning, sink connection checks, and disposer knockout verification on recent installs.
Typical repair$120-$310
UrgencyMedium
Repair or replaceFix first if the filter, hose, or disposer connection is the issue.
Likely causes
- Dirty filter
- Kinked or blocked drain hose
- Garbage disposal knockout not removed
- Drain pump issue
Safe first checks
- Clean the filter and remove debris from the sump area.
- Check the drain hose under the sink.
- If recently installed, confirm the disposal knockout plug is removed.
- Check air gap for debris if installed.
Likely parts and repair cost
Typical repair range: $120-$310. Parts or systems commonly considered:
- Filter assembly
- Drain hose
- Drain pump
- Check valve
Stop and call a pro when
- Water leaks under cabinets.
- Glass is lodged in the sump.
- The pump hums but water does not move.
Source trail
This guide starts with manufacturer support, public recall lookup, or safety references, then turns those sources into plain-language checks.
Questions people ask
Can a new garbage disposal cause a dishwasher not to drain?
Yes. The knockout plug must be removed when the dishwasher drains into the disposer.
Should I replace the pump first?
No. Filters, hose path, air gap, and disposer connection are cheaper first checks.