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If an E4 code appears on the display:
1. Reset the unit by disconnecting the power cord and then reconnecting it.
NOTE: The unit will not function until the code has been cleared.
2. Manually check to see if pump is operational by pressing the drain button. Verify
that the pump energizes and de-energizes properly. Additionally, check to see if any
water purged from the system.
3. If you haven't cleaned the system recently, check the discharge line for an obstruc-
tion, then clean the balance of the pump system (see "Maintenance" section for
details).
4. Replace the hoses and/or pump, if maintenance alone isn't sufficient.
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