Possible causes for error FTD
Published guidance and the observed behavior point to these possibilities: Blocked drain hose; Restricted air gap; Blocked or incorrectly connected disposer inlet. Check accessible conditions before considering a component fault.
Safe sequence
- 1Disconnect electrical power before handling drain components.
- 2Inspect the visible drain hose and clean the accessible air gap.
- 3Run the disposer and confirm a new-disposal knockout plug was removed.
Stop and get qualified help when
- Standing water cannot be removed safely
- The drain pump requires panel removal or electrical testing