If your building has a Montgomery elevator, you actually have KONE legacy equipment. Montgomery was acquired by KONE in 1994, ran as Montgomery KONE until around 2000, and then folded fully into KONE. That history matters, because it determines where your parts and support come from and how an obsolescence conversation should go.
Audience: building owner / property manager. Last reviewed: 2026-08-04 · Editorial review · Confidence: moderate (verify your specific unit).
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Why Montgomery equipment is an obsolescence question
Because Montgomery stopped being an independent line more than two decades ago, the oldest Montgomery controllers are now among the more mature platforms in service. Some Montgomery-era drives and boards have reached obsolescence, and support runs through KONE's legacy parts channel plus the aftermarket rather than an active Montgomery product line.
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What you likely have
- Legacy Montgomery relay and early microprocessor controls (oldest). The most likely to be flagged obsolete; aftermarket and upgrade paths apply.
- Miprom 21 controllers. A Montgomery-KONE-era platform. Some of the drives originally shipped with Miprom 21 have been obsoleted - and conversion packages exist to replace them (see below).
- Later KONE platforms. If your unit was modernized into a newer KONE control, it is a KONE obsolescence question, not a Montgomery one - see the KONE guide.
Safety. For understanding a proposal only. Do not open controllers or enter the machine room - ask your provider for the platform and commissioning date. Observe, document, escalate.
Parts and conversion options
- KONE Spares drive conversion - a CSA-certified package that replaces the obsoleted drives originally shipped with Miprom 21 controllers.
- Direct drive replacements for obsolete units such as the V3F16L.
- Aftermarket position indicators and components for older Montgomery fixtures.
These keep legacy Montgomery units running, but availability is platform-specific - confirm the exact part before relying on it. (Parts availability here is a market/field signal, not a permanent guarantee.)
How to verify an "obsolete" claim
- Confirm the exact platform (legacy Montgomery vs Miprom 21 vs a later KONE control) and commissioning date.
- Ask for the specific drive or board said to be unavailable, and whether a conversion package exists for it.
- Check KONE Spares and aftermarket before accepting an OEM-only, full-modernization conclusion.
- Weigh a non-proprietary controller if you plan to keep the unit for decades - it ends the single-source dependency.
Related
- Related: KONE controller obsolescence guide
- Compare: Independent (non-proprietary) controller guide
- Index: Elevator Controller Obsolescence Index
- Hub: Equipment
Recommended next step
Got a Montgomery/KONE-legacy modernization quote? Check it before you accept → - our free scanner flags premature obsolescence claims and lock-in language.
Sources: KONE/Montgomery corporate history (KONE acquisition 1994, integration ~2000), KONE Spares legacy conversion catalog (Miprom 21 drive conversion, V3F16L replacement). Confidence moderate; verify your specific platform. Revision history: 2026-08-04 initial.
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Frequently Asked Questions
Is Montgomery still in business?
No. Montgomery was acquired by KONE in 1994, operated as Montgomery KONE until about 2000, and then fully integrated into KONE. So a Montgomery elevator is effectively KONE legacy equipment, and its parts and support run through the KONE ecosystem and the aftermarket.
Can I still get parts for a Montgomery controller?
Yes, through a mix of KONE and aftermarket suppliers. For example, KONE Spares offers a CSA-certified drive-conversion package that replaces obsoleted drives originally shipped with Miprom 21 controllers, and direct replacements exist for obsolete drives like the V3F16L. Availability depends on your exact platform, so confirm the specific part.