If your Skymark, Fedders, or Singer through-the-wall unit has stopped heating or cooling, there's a good chance someone has already told you it can't be fixed and needs to be replaced — often for five figures. Before you sign off on that, it's worth knowing that a failed unit and a dead unit are not the same thing. Many of these systems can be repaired for a small fraction of replacement cost. The problem usually isn't the unit. It's finding someone who still knows how to work on it.
What these units are — and why Toronto is full of them
Through-the-wall and vertical "package" units were the standard climate-control system in a huge number of Toronto and GTA buildings put up between roughly 1980 and 2000. The whole system — compressor, coil, fan, and controls — sits in a single cabinet inside a wall sleeve, so there's no central ductwork or building water loop to rely on. Each suite runs on its own unit.
Three brand names come up again and again:
- Skymark / Skypak — a Canadian line that was everywhere in condos, apartments, hotels, and mid-rise commercial buildings across the GTA. The original line is no longer manufactured.
- Fedders — an American brand, nearly identical in concept to Skymark, common in apartments and hotels through the 80s and 90s. The company went out of business years ago, so there's no factory behind the units anymore.
- Singer — older vertical and through-wall packs that still turn up in legacy buildings.
If you own or manage a building from that era, there's a real chance you've got one behind an access panel right now.
Why you keep getting told to "just replace it"
Here's the honest reason most contractors push replacement: the brands are discontinued, so the technician has to actually diagnose the failure and source a part instead of ordering a new unit off a shelf. That takes knowledge and effort a lot of companies either don't have or don't want to spend. Quoting a full replacement is faster and, frankly, far more profitable for them.
That doesn't mean replacement is always wrong — sometimes it genuinely is the right call. But "the brand doesn't exist anymore" is not the same as "your unit is beyond repair," and the two get blurred together constantly.
What actually fails on these units
The cabinet and coil on these older units were often built like tanks. What usually fails are individual components — and most of them are repairable or replaceable:
- Run and start capacitors
- Contactors and relays
- Fan motors and blower assemblies
- Control boards and thermostats
- Compressors (repairable or swappable in many cases)
- Refrigerant leaks
In a lot of the "unfixable" units we're called out to, the actual fault is a single failed part that costs a fraction of a new system to put right.
Repair or replace — the honest breakdown
Repair usually makes sense when the cabinet and coil are structurally sound and the failure is a component — a motor, a board, a capacitor, or a compressor that can be sourced. You get years of additional service for a small fraction of replacement cost.
Replacement becomes the smarter choice when the coil is corroded through, when an older unit runs on R-22 refrigerant (which has been phased out and is now expensive to top up), or when the unit is failing repeatedly and throwing good money after bad. In those cases, a modern drop-in unit that fits the existing sleeve is the right answer — and we'll tell you so.
The point isn't "always repair." It's that you deserve a real diagnosis before anyone asks you to spend twelve thousand dollars.
A real example
Recently we were called to a Fedders unit — that brand nearly identical to Skymark. The owner had already been quoted somewhere between $12,000 and $15,000 to rip it out and replace it, and had been told by more than one company that it couldn't be repaired. We diagnosed the actual fault, sourced the part, and had the unit running again for under $500. Same comfort, same unit, a fraction of the cost — and no drywall torn open. That's not a rare story. It's most of what we see with these systems.
Skymark unit repair in Toronto — why so few companies do it
Working on discontinued equipment takes three things most shops are short on: the experience to diagnose an unfamiliar older system, the willingness to track down parts for a brand that no longer has a factory, and the licensing to handle older refrigerants safely and legally. It's simpler for a company to say "we don't service those" and quote you a replacement.
Epsilon Mechanical is one of the few Toronto and GTA contractors that actively handles Skymark unit repair — along with Fedders and Singer through-the-wall units. We're G2 certified, TSSA registered, and $5M insured, and we treat your unit the way we'd treat our own — fix what can be fixed, and tell you straight when it genuinely can't.
If your unit just failed
Don't authorize a replacement on the strength of a single quote. Before you spend a dollar:
- Find the nameplate — usually behind the access panel or on the cabinet — and note the brand and model.
- Get a real diagnosis of what actually failed, not just a replacement estimate.
- Ask whether the fault is a repairable component before agreeing to replace the whole system.
Not sure what you've got? Send us a photo of the nameplate and a description of what it's doing (or not doing), and we'll tell you honestly whether it's a repair or a replacement — and what it should cost.
Call (647) 269-9704 or reach us through our contact page for a straight answer on your Skymark, Fedders, or Singer unit.