I review roughly 1,800 replacement parts per year for commercial elevators and escalators. I reject about 10% of first deliveries. Very few are visibly broken. Most get rejected because I can't prove the part matches the equipment in front of me. That gap between 'it fits' and 'what it will actually do' is where callbacks start.
Here's the opinion I have to defend in every procurement meeting: if the equipment is a KONE elevator or escalator, I'd rather delay a repair than approve an untraceable substitute for a critical component. That's not brand loyalty. That's risk management. KONE spare parts aren't just metal, wiring, and plastic; they carry a specification baseline that can be checked, documented, and repeated.
I only believed the 'genuine part' rule after ignoring it
In 2020, a property manager asked me to approve a non-KONE door operator belt for a KONE elevator. The goal was to save money and keep the unit running. I checked length, width, and tooth pitch. Everything matched the KONE part number. So I allowed it.
The belt went in and worked for two days. On the third day, a door-timing fault put the elevator out of service during morning traffic. The belt wasn't dimensionally wrong; it was dynamically wrong. At certain temperatures, the belt was stiff enough to change the signal the controller received from the encoder. The controller read that change as a fault.
We pulled the substitute, installed the KONE part, reset the door parameters, and the fault didn't return. The substitute cost about $240 less. The after-hours callbacks, the replacement labor, the return shipping, and the tenant complaints cost more than that. The manager never asked me to test the rule again.
What a quality inspector actually checks before approving KONE spare parts
A KONE spare part request should never be approved based on a photo. Here's what I ask for on every order where the part affects door operation, braking, leveling, or safety circuits:
- Part number matches the spare parts list for that serial number. The same elevator model can have different revisions.
- Revision and software compatibility. If the controller has been updated, the replacement component may need a matching revision.
- Traceable documentation. The supplier should be able to show that the part came from an authorized KONE distribution channel.
- Engineering verification for modified units. If the building had a non-standard modification, the replacement part needs to be verified for that modified condition.
According to ASME (asme.org), ASME A17.1/CSA B44 is the safety code for elevators and escalators in most North American jurisdictions. The code doesn't name a preferred spare-part brand. But it does require the maintenance contractor to keep the equipment safe and in conformance with its design. That's difficult to prove when the part history starts with an unmarked box.
I don't have hard data on how many substitute parts fail across the industry. I do have our own 2024 audit trail: the rejected deliveries in the first half of the year all had one thing in common. The documentation didn't support the application.
The total cost argument cuts the other way
In the B2B world, most elevator repairs happen under pressure. The deadline might be a tenant move-in, a building inspection, or a construction schedule. When the deadline is real, the certainty of a delivery date is part of the product.
This is where I separate myself from the 'find the cheapest option' advice. A cheaper substitute might save $400 on the invoice. But if the building owner loses a day of occupancy or an inspection slot, the real loss is measured in rent, permits, and credibility. The phrase 'probably compatible' should never appear in an elevator safety conversation.
You're not paying for a part number. You're paying to remove the question mark.
The pushback I expect
Let me answer the obvious objection: 'You only say this because your company is tied to KONE.' Actually, I've rejected genuine KONE parts too. That happens when an older unit was modified outside the original specification. The lesson is not to worship the logo. The lesson is to require the same discipline that the original manufacturer applies.
I also use independent suppliers for non-critical work. If an independent supplier can provide the correct KONE part with complete traceability, I'm happy to approve it. My issue isn't with local repair companies. My issue is with unverified parts that ask the elevator to absorb the risk.
Bottom line
If you're ordering for a KONE elevator, put KONE spare parts at the top of the request when safety or compatibility is on the line. Ask for proof before installation. And when someone pressures you to move fast, remember that a delay caused by a bad part is always more expensive than a delay caused by a careful inspection.
The part number is a promise. Verify the promise before you buy.
This reflects my inspection process as of February 2025. KONE part numbers and product lineups change. Always verify part compatibility with current KONE documentation and the serial-number data for the specific elevator.
