specific installation instructions

IOM-WR-WW 1453 34 of 36
Although this troubleshooting guide is provided to assist with problems experienced with
a floor-warming system, results are never guaranteed. The company does not assume any
liability or responsibility for damage or injury that may occur from using this guide.
If problems with the system persist, call the manufacturer.
Problem Possible Cause Solution
Floor heats
continuously.
Incorrect wiring. The control was
“bypassed” when it was wired to
the power supply.
Make sure wiring connections are correct. Consult
the wiring diagram on the back of the control, the
instructions that came with the control, or the
wiring diagrams in Appendix 2.
Defective control. Return control to dealer for replacement.
Control is
not working
correctly.
If a programmable control, the
programming may be incorrect.
Carefully read and follow control programming
instructions.
Incorrect voltage supplied, or
mismatched components used.
Test voltage, verify parts. See “Incorrect voltage
supplied” section
Floor sensor is not wired properly,
or is not working properly.
Make sure only one floor sensor is connected to the
control.
Loose connection(s) on line side
and/or load side of control.
Remove and reinstall the wire nuts at each
connection. Make sure the wire nuts are tight.
Check all connections back to the breaker.
Defective control. Return control to dealer for replacement.
Control is not
working at all.
No power is supplied.
Check circuit breaker. Measure voltage at the
control. Check all connections between breaker and
control.
Floor sensor is not wired properly,
or is not working properly.
Make sure only one floor sensor is connected to the
control.
Defective control. Return control to dealer for replacement.
GFCI conflicts
and false-trips.
An electric motor or a ballasted
light source is sharing the circuit
with the cable(s).
Electric motors and similar electrical devices can
cause a GFCI to false-trip. Run a dedicated circuit
to the floor-warming system or select a different
branch circuit.
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or
other reproductive harm. For more information: www.watts.com/prop65