Digital Whirlpool garbage disposal runs intermittently and shows E4 error on the control module.

Safety first: Turn off the breaker and unplug the disposal if possible.

• Inspect control module: Locate the Whirlpool electronic control box (usually mounted under the sink or integrated at the base). Check for signs of moisture, corrosion, or burn marks.
• Check harness connections: Reseat the low-voltage harness connectors between the sink-top switch module and the control box, and between the control box and the disposal motor.
• Dry moisture: If you see condensation or water, dry the area thoroughly and correct any leaks from the sink flange or plumbing before re-energizing.
• Test operation: Restore power and test. If E4 returns, the control board is likely defective and should be replaced with the correct Whirlpool control module.