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Troubleshooting Guide
Raychem-IM-H58067-IceStopRoofGutterDeIcing-EN 18/01
Symptom
Corrective Action
D. Heating cable fails insula-
tion resistance test.
Connections or splices may be
shorting out. Physical damage
to the heating cable.
To confirm that heating cable is damaged or connection kits
are shorting, test the insulation resistance according to the
procedure described in “Test Methods,” Section 7.
Locate and repair incorrect connections or splices.
Locate and remove damaged sections of heating cable.
To locate shorting problems, follow these steps:
1. Visually inspect the power connection, splices, and end
seals for proper installation.
2. Check for visual indications of damage to the cable, espe-
cially in any area where there may have been maintenance
work.
3. Look for damage at entrances to downspouts, around
eaves, and at transitions from roof and gutter.
4. If at this point you have not located the problem, you will
need to begin isolating sections of the heating cable to find
the general area of damage. (For example, cut the circuit
in half and, using a megohmmeter, test both halves to find
the damaged section.) Then remove the damaged section
of heating cable.
Excessive moisture in connec-
tion boxes or splices.
Dry out and reseal connections and splices. Test with a meg-
ohmmeter per installation instructions.
Nick or cut in heating cable or
power feed wire with moisture
present.
Locate and replace damaged heating cable or power feed
wire.
E. Snow is not melting
around the heating cable.
Circuit breaker is tripped.
Controller not on or not
working.
Ambient temperature too cold.
See Symptom A, “Circuit breaker trips.”
Check controller.
F. Downspouts are blocked
by ice.
Circuit breaker is tripped.
Controller not on or not
working.
Ambient temperature too cold.
See Symptom A, “Circuit breaker trips.”
Check controller.
G. The circuit does not draw
sufficient power of approx-
imately 12 W/ft (39.36
W/m) at 32°F (0°C) in snow
or ice (5 W/ft (16.4 W/m) at
32°F (0°C) in air).
Circuit breaker is tripped.
Controller not on or not
working.
All sections not connected.
See Symptom A, “Circuit breaker trips.”
Check controller.
Repeat continuity test, as detailed in “Continuity Test,”
"Insulation Resistance (Megohmmeter) Test" on page 53.