Every year around late January, the same call lands on my desk. Our maintenance supervisor is on the phone, and the story is usually one of three things: the snow blower won't start, the walk-in is running warm, or the ice maker hasn't dropped a cube in two days.
"I need to order a new compressor." That's the next sentence, almost before I can ask what the diagnostics actually showed.
I've managed procurement for a mid-size property maintenance company for six years now. In that time, I've tracked roughly $180,000 in equipment spending across our fleet—compressors, snow blowers, ice makers, air filters, you name it. And after six years of approving (and occasionally denying) replacement invoices, I've learned something that changed how I budget:
The Tecumseh compressor or engine that everyone assumes is dead usually isn't. The thing that actually caused the failure is almost always smaller, dumber, and way cheaper than the replacement quote.
That gap—between what a failed machine looks like and what's really going on—costs companies like ours a lot more than the replacement parts themselves. Here's what the data showed me.
The Same Pattern, Repeated Across the Fleet
Start with the ice maker. In early 2023, the small commercial unit in our break room—it runs on a Tecumseh compressor—stopped producing ice. The first vendor quoted $650 to "replace the sealed system." The second said $780. Both were pretty sure the compressor was the problem.
I told them to hold off. Not because I knew better, but because I'd been burned before. I asked one of our regular refrigeration techs to take a look. His first question: "When's the last time it was cleaned?"
I didn't have a great answer. So I spent an afternoon figuring out how to clean an ice maker the right way—removing the scale from the evaporator, running the cleaner through the system, swapping the water filter. The supplies cost about $15. The unit was making ice again within two days.
The mineral scale had made the system act like it had a weak compressor. It didn't need $650 worth of sealed system work. It needed a $15 cleaning and a quarterly maintenance habit.
The $55 Filter Decision That Cost $1,400
The same pattern showed up on our snow blowers, but with a more painful ending. We ordered the Tecumseh air filter 36905 for all ten units in our fleet—genuine OEM parts, about $14 each. Then, in a cost-cutting conversation, someone suggested trying aftermarket equivalents at $8.50. Seemed harmless. We saved a grand total of $55 on that batch.
By February, one of the snow blowers was smoking. Then another. The shop's diagnosis was the same for both: dust ingestion. The aftermarket filters weren't seating properly in the filter housing, and fine abrasive dust was getting past them. Two engine repairs, $1,400 total. The $55 we saved on air filters cost us $1,400 in unexpected engine work.
I'm not a small-engine mechanic, so I can't speak to the exact tolerances involved. But I can read the purchase orders. Those cheap filters were the most expensive purchase I made that year.
The "Locked Up" AC Compressor That Wasn't
Then there's the classic Tecumseh AC compressor story. A rooftop unit on one of our commercial properties stopped cooling. The service tech was confident the compressor had locked up. His replacement quote: $2,400.
I asked the question I now ask on every big repair: what does the maintenance log say? Turns out the log showed a contactor that had been chattering for two previous visits. Nobody flagged it as urgent. That chattering contactor caused the compressor to short-cycle, overheat, and eventually fail.
The contactor replacement cost about $350. The compressor replacement would've been $2,400. Plus the downtime we didn't need, and a tenant who wasn't happy.
Propane heaters follow the same script. When heat output drops, the first instinct is to replace the unit—I've seen quotes around $900 for that. But in most cases, it's a $15 thermocouple or a clogged orifice. I can't speak to the combustion engineering with any authority, but from a cost-tracking perspective, the pattern is exactly the same.
What Premature Replacement Actually Costs
At the end of 2023, I pulled every equipment repair invoice from our cost tracking system and went through them line by line. Here's the number that stood out: about 34% of our repair costs were tied to issues that basic preventive maintenance would have caught.
We spent roughly $38,000 on equipment repairs that year. So about $13,000 of it was avoidable. It breaks down roughly like this:
- About $3,100 in ice maker service calls caused by scale buildup
- $2,400 for the AC compressor that the contactor killed
- $1,400 for the two snow blower engines that ate dust
- Another $6,100 scattered across other "sudden" failures
Here's the part I keep quoting in budget meetings: a basic preventive maintenance program for our fleet runs about $6,500 a year. That's tech time, replacement air filters, coil cleaning, and ice maker descaling. So for every $1 we spent on preventive maintenance, we avoided about $2 in emergency repairs. Not a bad return.
And that's not even including downtime, which never appears on an invoice but definitely shows up in lost productivity and annoyed clients. When a tenant's ice maker is down for a week, or the snow blower breaks right before a snow event, the cost is real. It just doesn't show up as a line item.
There's also the hidden cost in cheap replacement parts. Every time someone saves $6 on an aftermarket filter or $40 on a non-OEM starter, they're rolling the dice. If that part fails, you're not just buying the OEM part anyway—you're paying for labor to swap it, again. Our internal tracking showed the aftermarket parts we tested failed at more than double the rate of the OEM parts, and the real cost—parts plus labor to redo the work—was three times the initial savings. That's the kind of math that changes your perspective.
And the customer side matters too. We win contracts based on reliability. When equipment keeps failing, clients don't care about the root cause—they just see a property manager who isn't on top of things. Perception has a cost, even if it doesn't show up on an invoice.
The Fix Is Uncomfortably Simple
So what do I actually do now? It's not glamorous.
First, nothing gets replaced before the maintenance log gets read. If a tech says the compressor is dead but can't show me what they checked, the replacement invoice doesn't get approved. Period.
Second, maintenance is on a calendar, not a crisis. Air filters on every piece of equipment get changed at the start of the season. That means the Tecumseh air filter 36905 on each snow blower, before the first snow. Not when the engine starts complaining.
Third, the ice makers get cleaned quarterly. It's an hour per machine and about $15 in supplies. Learning how to clean an ice maker properly was genuinely one of the highest-ROI skills our team picked up this year.
Fourth, I compare total cost, not sticker price. When we do need a part, I look at warranty length, whether technical support is included, and the failure history we've tracked internally. Sometimes the $680 part is cheaper than the $430 part once you factor in the 24-month warranty and the hassle of replacing it twice.
I'll be the first to admit this advice comes from a company that runs a fleet of equipment, not a single home appliance. If you're a homeowner who owns one snow blower and one window AC, your numbers will look different. But the principle doesn't change: the part that fails is rarely the part that caused the failure.
Bottom Line
The most expensive Tecumseh part I've ever bought was the one we didn't need. The cheapest part I've ever bought was the filter that kept the expensive parts alive.
It took me six winters, more than a few bad invoices, and one very expensive February to learn that. If you're holding a $2,400 compressor replacement quote right now, my advice is simple: read the maintenance log first, check the cheap stuff, and calculate the total cost before you approve the work.
Your wallet will thank you.
