Heat pump owner says a 10-cent zip tie might have averted an expensive failure

"This is something I check during startup on all units."

A mini-split that apparently ran for five years and two months — just past its five-year warranty — broke down in a way that left one owner looking for answers and an HVAC technician frustrated by what seemed like an avoidable error.

What happened

In a Reddit post, the original poster said a loose wire on the mini-split had worn through, shorted the control board, and eventually rubbed a hole in the refrigerant line.

"Seen it a million times, easy fix," one commenter wrote.

But from the OP's point of view, the issue should never have gotten that far. "Yeah, but mfg should know better and add a zip tie to keep it from rubbing," they replied.

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More details

The OP also explained why the repair became so expensive. "I replaced the control board not seeing this and thankfully didn't short the new one before finding the hole," they said in a comment. "Easy fix, but it's one control board, nitro, 410a, and my time vs. a 10-cent zip tie."

A wiring issue like that can quickly turn into a repair that involves electronics, refrigerant, and the labor needed to deal with both. Because the unit was a mini-split, several costs could stack up from the same failure.

What can be done?

One commenter said, "This is something I check during startup on all units," adding that they have rerouted wires on both "residential and large commercial units."

For a mini-split like the one discussed, having an installer or service technician confirm during startup and maintenance that cables stay clear of vibrating lines could help prevent the same damage.

If a breakdown like this leads a homeowner to replace rather than repair, Palmetto's Comfort Plan includes $0-down options that can lower heating and cooling costs by up to 50%. Palmetto Comfort Plans also include 12 years of free maintenance, which can matter to anyone worried about catching small problems before they become expensive.

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Where can I learn more?

More HVAC stories like this one show how small service mistakes and maintenance choices can snowball into costly damage.

• In California, a homeowner with total AC failure found honest HVAC advice after conflicting repair quotes.

• An HVAC specialist warned that closing vents can quietly raise costs and strain an air conditioner.

• A U.S. HVAC apprentice said refrigerant that technicians vent can do more harm than many homeowners realize.