After paying $12,000 for a furnace-and-AC replacement, a Chicago homeowner asked Reddit for a gut check after spotting bent lines, exposed wiring, flawed metalwork, and other signs the job may have been rushed.
Here's what to know
The concerns appeared in a post on Reddit in r/HVACAdvice, where the homeowner included pictures of the job and said that a closer look at the mechanical room raised several alarms.
Among the issues they described were a mounted control box that appeared to be missing side covers, with "one bare unconnected wire just hanging out," an "Unsealed gap at the intake/panel seam," and old, deteriorated insulation left on the refrigerant line. They also said the refrigerant line's wall penetration looked "visibly bent/deformed" and that the electrical conduit was under "visible tension."
Price quickly became part of the discussion, with several commenters suggesting that $12,000 sounded unusually low for a full installation in the Chicago area. Views on the workmanship were split. One person wrote, "Electrical looks sloppy but code compliant," while another said, "My only real criticism that will lead to problems down the road on this is the penetration covering."
The homeowner said they had accepted the quote at the time, later writing: "I thought the price was reasonable and didn't balk at it. I would have happily paid more for a better install though."
More background
HVAC systems are among the most expensive and important pieces of equipment in a home, so visible shortcuts can quickly raise concerns, especially when they involve electrical work, airflow, or access around other major appliances such as a water heater.
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Even if a system appears to be running normally, poor workmanship can still create problems. Gaps and improper sealing can pull dust into the system, awkward routing can make future maintenance more difficult, and damaged or poorly positioned components can undermine confidence in the installation long before the equipment reaches the end of its lifespan.
The Reddit thread centered on a common challenge for consumers: Many homeowners do not know whether something is simply unattractive or actually unsafe. The original poster made that distinction directly, saying, "I'm not a tradesman so I don't know what's cosmetic vs. actually unsafe/non-code, which is exactly why I'm asking here."
Careless installation can also mean wasted materials, lower efficiency, and added wear on systems meant to help households save energy, not lose it.
What can be done?
For homeowners in a similar situation, clear photos of bent lines, missing covers, unsealed penetrations, and blocked appliance access can make follow-up conversations with the installer much more productive.
It can also help to request a detailed walk-through of the work, ask whether permits and inspections apply, and seek a second opinion from another licensed HVAC professional if something seems off, especially when the issue involves wiring, combustion appliances, or anything that could affect ventilation.
Consumers can also protect themselves before a project begins by getting multiple quotes, asking how line sets and duct transitions will be handled, and confirming what a "new install" actually includes. A lower bid may still be legitimate, but it should come with a clear scope of work and clean execution.
Where can I learn more?
These articles cover disputed HVAC bills, aggressive sales tactics, and other troubling A/C issues.
• A homeowner on Reddit said a simple HVAC repair turned into an "unprofessional" $2,300 bill.
• On Reddit, homeowners said contractors used trust-me sales tactics to push costly HVAC systems.
• One tenant said a landlord installed a fraudulent A/C system that crossed the line.
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