Setting the Controller
To reduce the risk of severe injury, illness, death, and/or property damage, read and
follow all instructions. Use only Maytag Whole Home Water Filtration System
authorized parts where required to repair and service the Maytag Whole Home Water
The Controller is a timing device that automatically opens the automatic drain valve to provide daily flushing and
prevent accumulation of solid material that would result in premature System fouling.
The MAYTAG Whole Home Water Filtration System is equipped with either a Base Controller (Models
MWF4100AWS and MFW4200AWS) or Advanced Controller (Model MWF4300AWS). The Advanced controller
includes the added feature of automated inlet (solenoid) valve control. This feature provides the most thorough
flushing by completely draining the system.
See Table 5 or 6 Controller Program Selection for a description of the various program choices available
with each Controller.
(Models MWF4100AWS and MWF4200AWS)
Base Controller setup procedure- Models MWF4100AWS and MWF4200AWS
Use with low
Has one output
controls only the
Table 3-Base Controller Setup Procedure
MAYTAG Whole Home Water Filtration System Owners Manual MA1-5
11. Restart pump or slowly open the inlet ball valve. Water will begin to
enter and repressurize the System.
12. Press and hold the red button on the External Prefilter head to allow
air to exit the External Prefilter Housing during filling.
Note: Step 12 is important for the External Prefilter to function properly.
13. If the System is equipped with bypass, ensure that the bypass valve
14. Flush the MAYTAG Whole Home Water Filtration System for 1
minute using the controller (refer to step 3) to purge air from the
System. Open the MAYTAG Whole Home Water Filtration System
outlet ball valve to return to service.
Modes: Use 'next' button to toggle through modes.
Manual flush: Press 'next' until 'manual' is flashing. Press 'manual flush'
and hold. If held for longer than 10 seconds, drain valve remains open. Toggle
drain valve closed by pressing 'manual flush' once.
Setting time of day: Press 'next' until 'set time' appears. Press 'enter'. Use
up/down arrows to set time of day. Press 'enter' to set.
Set time of flush: Press 'next' until 'start time' appears. Press 'enter'. Use
up/down arrows to set time of flush. Press 'enter' to set.
Setting program choice: Press 'next' until 'program' appears. Press 'enter'.
Use up/down arrows to select program choice. Press 'enter' to set.
(See Table 5 for programming choices.)