Install Instructions

IOM-WR-SH 1528 22 of 24
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.
Floor
temperature
shows much
higher than
what the floor
feels like.
Floor sensor is not wired
properly, or is located
incorrectly.
Make sure only one floor sensor is connected to
the control.
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” above.
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 other 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