6
Troubleshooting Guide
PROBLEM
CAUSE
ACTION/SOLUTION
Toilet does not flush or
Waste tank is full (tank indicator
Empty waste tank before continuing to use toilet.
flush performance is poor
light on wall switch is RED)
Override full tank lock-out.
WARNING: THIS MAY
CAUSE WASTE TANK TO OVERFLOW.
Clog at pump inlet
Clear clog.
DO NOT
flush foreign objects.
Solid object in macerator
Do not attempt to remove object from pump body. Contact Thetford/
Tecma Service (1-800-521-3032).
DO NOT
flush foreign objects.
Low voltage
Check that toilet supply voltage is 12V+/-2V (24V+/-2V)
AND that there is no more than a 10% decrease in voltage
when macerator is running. If voltage decreases more than
this, there may be a wiring problem in the boat.
Water does not enter bowl
Water supply line kinked or not
Check that supply line is properly connected to fresh
during flush or water add cycle
connected
water supply.
Check for kinks in the supply line.
No power to water pump
Check that fuse/circuit breaker has not tripped.
Ensure all electrical connectors to pump are fully mated.
Water supply has been turned off
Open water supply valves or reconnect power to supply pump.
Solenoid not plugged into
Ensure wiring harness to solenoid is fully mated at both ends.
controller (where applicable)
Electronics control problem
Contact Thetford/Tecma Service (1-800-521-3032).
Water level in bowl has
Flush refill mode has been
See “Programming” section in Owner’s Manual.
changed after flush
changed
Water continues dripping briefly into
Toilet is installed below water line with
Normal operation – if only a small amount of water drips
bowl after flush cycle is complete
vacuum breaker in water supply line
from nozzle.
Bowl drains dry after flush
Water is siphoning out of bowl
Discharge hose from macerator pump bent. Straighten hose.
Wall switch does not appear to
No power to toilet
Check that fuse/circuit breaker has not tripped
light up or does not stay lit
Ensure all electrical connector are fully mated.
Wall switch not properly connected
Ensure wall switch electrical connector is fully mated at
to toilet.
controller.
Wall switch has entered Sleep Mode
Wall switch enters Sleep Mode after eight hours of continuous
inactivity but remains functional. No action required.
Wall switch electronics problem
Contact Thetford/Tecma Service (1-800-521-3032).
Toilet is inoperative and there is
No power to toilet
Check that fuse/circuit breaker has not tripped
no lighting in the wall switch
Ensure all electrical connector are fully mated.
Contact Thetford/Tecma Service (1-800-521-3032).
NOTE
: This Troubleshooting Guide is intended to provide a basic service aid in the case of incorrect toilet operation. If the suggested actions above do not
resolve the issue, it may be necessary to bring unit in for professional service.
Thetford Customer Service – 1-800-521-3032
