Specifications

9
Dometic 4300/4400 Series Toilets Maintenance/winterizing/service
Symptom Possible Cause Service Instruction
3. Water will not enter toilet bowl,
but toilet ushes.
Blocked water supply or electrical
failure.
• Blockage in water line to toilet.
Remove line and clear.
• Filter screen at water valve inlet
is clogged with debris. Remove
water line and clear debris.
• Loose or defective wiring be-
tween water valve and terminal
block pins 1 and 8.
• Defective water valve. Replace
with new water valve.
4. Water will not enter toilet bowl
when ush handle or wall switch
is in “Add Water” position.
Electrical connection failure. • Loose or defective wiring
between ush switch and
terminal block pins 1 and 3.
• Defective ush switch. Replace
with new ush switch.
5. Water will not shut off and
overows toilet bowl.
Water valve-related failure. • Debris in water valve.
• Defective water valve. Replace
with new water valve.
6. Flush ball constantly cycles
between open and closed
position.
Component adjustment required or
defective component.
• Cam switch needs adjustment.
See adjustment procedure for
ush ball over-travel on p. 11.
• Cam switch is defective.
Replace.
• Drive linkage defective. See
replacement instructions, p. 12.
• Shorted wiring between ush
switch and terminal block pins 2
and 3.
• Defective ush switch. Replace.
7. Flush ball opens slowly and will
not open when manual ush
lever is pressed.
Component adjustment required or
defective component.
• Flush spring is defective.
Replace.
• Excessive drag between ush
ball and ush ball seal. Lubricate
ush ball and seal with silicone
spray.
8. Flush switch must be held
in “Flush” position to close
ush ball.
Defective electrical component. • Loose or defective wiring
between cam switch and
terminal block pins 2, 3 and 6.
• Cam switch is defective.
Replace.
9. Flush ball will not close
completely.
Component adjustment required or
defective component.
• Cam switch needs adjustment.
See adjustment procedure for
ush ball over-travel or under-
travel, p. 11.
• Cam switch is defective.
Replace.
• Rotor shaft cam is loose or
defective. If defective, see
replacement instructions, p. 12.
• Drive linkage is worn. See
replacement instructions, p. 12.
Caution - Motor starts automatically
Turn off electrical power before servicing.
Caution - Electrical system
Turn off electrical power before servicing.