A mini-split that reportedly lasted five years and two months — just beyond its five-year warranty — failed in a way that left one owner seeking advice and an HVAC tech fuming over what sounded like a preventable mistake.
Here's what to know
In a Reddit post, the original poster said their mini-split had a loose wire that wore down, shorted the control board, and wore a hole in the refrigerant line.
"Seen it a million times, easy fix," one commenter wrote.
Assurance aside, from the OP's perspective, the breakdown never should have reached that point. "Yeah, but mfg should know better and add a zip tie to keep it from rubbing," they replied.
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More background
The OP also laid out why the fix became costly. "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 wire routing problem like that can quickly become a repair involving electronics, refrigerant, and the labor to handle both. Since the OP said the unit was a mini-split, several costs could pile up from the same failure.
What can be done?
One commenter shared, "This is something I check during startup on all units," and said they have rerouted wires on both "residential and large commercial units."
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For a mini split like the one discussed, having an installer or service tech confirm during startup and maintenance that cables stay away from vibrating lines could help prevent the same damage.
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Where can I learn more?
More HVAC stories like this one look at how small service mistakes and maintenance decisions can snowball into expensive 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 stress an air conditioner.
• A U.S. HVAC apprentice said refrigerant that techs vent can do more harm than many homeowners realize.
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