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Fix a heated gutter that will not melt ice

We'll check power, thermostat, and the heating cable—or tell you when to call a pro.

Troubleshooting · Home appliances
15–45 min
What you'll need
  • Multimeter (for continuity tests)
  • Replacement heat tape or thermostat (if tests show a fault)
Step 1 of 6

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Steps

Goal: Confirm the symptom, rule out power and cable condition, then isolate the fault.

  • Plug in the heat tape and, if it has a thermostat, set it to heat. Wait 10–15 minutes and feel the cable.
  • Good: The heat tape powers on but stays cold—heating fault. Proceed to Check power and thermostat.
  • Bad: No power at all—check the cord and outlet. See When to get help.

Check power and thermostat

Goal: Rule out power loss and thermostat settings before testing the cable.

  • Verify the heat tape is plugged in and the circuit breaker has not tripped. If the outlet is GFCI, press the reset button. Test the outlet with another device.
  • If the heat tape has a thermostat, verify it is set to activate (often 38–42°F or similar).
  • Inspect the cable for kinks, cuts, burns, or overlapping—overlap causes overheating and failure.
  • Good: Power is on and the cable is intact. Proceed to Check cable.
  • Bad: Breaker keeps tripping or cable is damaged—fix those first, or call a pro.

Check cable

Goal: Test the thermostat and heat tape for continuity.

  • If the heat tape has a thermostat, test it for continuity when cold. Replace if it fails.
  • Unplug the heat tape. Test the heat tape for continuity. If no continuity or visible breaks, replace the heat tape—do not repair.
  • Good: You found and replaced the faulty part. The cable should warm within 10–15 minutes when plugged in.
  • Bad: All parts test good but the cable still does not heat—call a technician.

When to get help

Call an electrician if:

  • The heat tape is hardwired and you are not comfortable with electrical work.
  • The breaker trips when you reset it.
  • You see damaged wiring.
  • You have replaced the thermostat and it still does not heat.

Do not work on live circuits.

Verification

  • The heat tape warms within 10–15 minutes of being plugged in (or when the thermostat activates).
  • No burning smell or damaged cable.
  • The thermostat or heat tape (if replaced) tests good and the gutter melts ice when cold.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Power and thermostat Confirm heat tape is plugged in and thermostat (if present) is set to heat.
  2. Cable inspection Check for damage, kinks, or overlapping cable.
  3. Thermostat continuity Test thermostat for continuity; replace if faulty.
  4. Heat tape continuity Test heat tape for continuity; replace if damaged or failed.
  5. Call a pro Hardwired system, breaker trips, or parts replaced and still no heat.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Whether the heat tape has a thermostat
  • Circuit breaker status
  • Thermostat and cable continuity test results
  • Steps already tried

Does the heat tape power on but stay cold?

Plug in the heat tape and check for power. If it has a thermostat, set it to heat. Wait 10–15 minutes and feel the cable.

Plug in the heat tape. If it has a thermostat, set it to heat. Wait 10–15 minutes. Feel the cable. Good: power on but cable cold—heating fault. Bad: no power at all—different problem (cord, outlet).

Yes No

You can change your answer later.

Is power on and the cable not damaged or overlapping?

Circuit breaker, GFCI, and cable condition can prevent heat.

Verify the heat tape is plugged in and the circuit breaker has not tripped. If GFCI, press reset. Inspect the cable for kinks, cuts, burns, or overlap—overlap causes overheating. Good: power on and cable intact. Bad: breaker tripped or cable damaged—fix those first.

Yes No

You can change your answer later.

Does the thermostat have continuity when set to heat?

If the heat tape has a thermostat, test it. Some tape is always-on and has no thermostat.

If the heat tape has a thermostat, test for continuity when cold. No continuity when it should be on: thermostat failed—replace. Continuity or no thermostat: proceed to heat tape test.

Yes (good) No (failed)

You can change your answer later.

Replace thermostat and test

Replace the thermostat with a matching model. Plug in and wait 10–15 minutes. The cable should warm if the thermostat was the only fault.

Done

Does the heat tape have continuity?

Test the heat tape. A break in the cable stops heating.

Unplug the heat tape. Test for continuity. No continuity: heat tape failed—replace; do not repair. Continuity: cable good—check connections or call a technician.
Question

Does the heat tape have continuity?

Done

Call a technician

Call an electrician if: the heat tape is hardwired and you are not comfortable with electrical work; the breaker trips when you reset it; you see damaged wiring; or you have replaced the thermostat and it still does not heat.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a heated gutter not melt ice?
Common causes: power loss, tripped circuit breaker or GFCI, thermostat set to off, blown thermal fuse, damaged or kinked cable, or overlapping cable (causes overheating). Check power and thermostat first.
Can I fix a heated gutter that will not melt ice myself?
Yes, for plug-in heat tape. Check power, circuit breaker, and GFCI. You can test and replace the thermostat or heat tape if accessible. Replace damaged cable—do not repair. Call an electrician for hardwired systems or damaged wiring.
When should I call a technician for a heated gutter?
Call an electrician if the heat tape is hardwired or you see damaged wiring, the breaker trips when you reset it, or you have replaced the thermostat and it still does not heat. Do not repair damaged heat tape—replace it.

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