Garage Door Motor Replacement in Missouri | Garage Door MO
from $279
Garage Door Garage Door Motor Replacement in Missouri
Opener motor and gear-assembly replacement when the unit can be salvaged, or full opener swap when it can't. We size the new motor to your door weight (1/2, 3/4, or 1.25 HP).
Garage Door Motor Replacement is one part of our garage door opener coverage in Missouri. For the full picture — symptoms, costs, and when to repair vs. replace — start with the complete Garage Door Opener Repair guide, or browse every garage door opener service we offer.
Garage Door Garage Door Motor Replacement in Missouri
Motor replacement is the right move when the opener's motor or gear assembly has failed but the rest of the unit (logic board, rail, sensors, remotes, wall console) is still in good shape. On a 6–9 year old LiftMaster or Genie, motor or gear replacement is typically 40–60% the cost of a full opener swap and gives you another 8–10 years of life. We carry motor and gear assemblies for the major brands and most models from the last 12 years.
Sizing matters. A motor sized for a light non-insulated 8x7 door will burn out fast on a heavy insulated 16x7. We size replacements by measured door weight: 1/2 HP for light residential, 3/4 HP for standard insulated, 1.25 HPS for heavy insulated or oversized doors. If the original opener was under-sized, we recommend an upgrade rather than matching the underspec original.
After motor replacement, we re-program travel limits, re-calibrate force settings, and verify auto-reverse on an obstruction test. The full visit takes 90–120 minutes including these checks. We include a 2-year parts and labor warranty on the motor replacement.
Signs you need garage door motor replacement
Motor hums, door doesn't move
Capacitor failure (cheaper fix) or motor windings (full motor needed). Diagnostic determines which.
Burning smell during operation
Stop using the opener — motor is overheating, possibly due to gear strip or under-sized motor on heavy door.
MyQ, HomeKit, Alexa — control your door from anywhere.
Gear assembly stripping or bearing failure. Continued use destroys the gear; immediate service preserves a $149 gear swap vs. a $349 motor replacement.
Door moves slower than it used to
Worn motor windings can deliver less torque, causing slow travel. Diagnostic confirms motor vs. unrelated issues.
Smoke from motor housing
Severe motor failure or wiring fault — unplug immediately and call for emergency service.
Common causes & what we fix
Capacitor age
Start capacitors dry out over 7–10 years and stop providing torque to the motor. Often misdiagnosed as motor failure. $25–$89 capacitor swap usually fixes.
Gear assembly wear
Nylon worm gears strip after years of cycles. The gear, not the motor, is failing — gear replacement is much cheaper than motor replacement.
Motor winding burnout
Genuine motor failure from over-load on heavy doors or sustained operation against an obstructed door. Replacement is the fix.
Power surges
Grid events damage motor electronics. Surge protection prevents the most common failures.
Bearing failure
Motor bearings fail at 12–15 years on average. Replacement is possible but often makes more sense as full motor swap.
Our process
1
Call or schedule online. Schedule garage door motor replacement on a 2-hour window that suits you. Within five minutes you'll get a confirmation carrying the name and photo of the tech we're sending.
2
On-site diagnosis. Our Missouri tech inspects the garage door motor replacement on-site first. Diagnosis is free for most repairs ($39 on minor calls, waived if you proceed), and you see the problem before any work starts.
3
Flat-rate quote. Before starting, we hand you a written, flat-rate garage door motor replacement estimate. What you see is what you pay — no hourly surprises, no commission-driven add-ons.
4
Same-visit fix. Nine times in ten — 96%, really — the garage door motor replacement is done in one visit. You watch the final test cycle, and we haul off every old part and bit of debris.
How much does garage door motor replacement cost in Missouri?
Garage Door Motor Replacement the United States starts at from $279, and the garage door motor replacement number is flat-rate, written, and set before we begin — no hourly billing, no surprise parts charges. We discount labor 10% for seniors (65+) and military, and projects over $1,500 can use 0% APR Synchrony financing for 12 months with no prepayment penalty.
Why homeowners in Missouri choose us for garage door motor replacement
We've been a trusted choice since 1974 — over 50 years of family-owned garage door service across Missouri. Our techs are CSLB-licensed (#1098234), background-checked, and complete an internal 12-week training program before rolling on calls alone.
Garage door motor replacement is guaranteed ten years on our workmanship — a promise that sits apart from the manufacturer's parts coverage. If the garage door motor replacement we performed fails because of our install, the fix is free for the full decade. 30,000-cycle springs are lifetime-warrantied for the original homeowner, and parts and accessories run 1–5 years.
The two rules behind every garage door motor replacement quote: don't sell work that isn't needed, and show the customer everything. Our salaried techs have no commission incentive, the diagnostic is fully transparent, and we call repair-versus-replace on the long-term math, not the bigger ticket. Your flat-rate garage door motor replacement quote is written and good for 30 days.
Areas we serve for garage door motor replacement
We provide garage door motor replacement throughout Missouri, with fast coverage in every major Missouri metro.
Because Missouri traffic moves garage door motor replacement response times around, we quote your ETA live on the call rather than guessing. Our dispatch number connects to an on-call tech with no voicemail in the way.
Frequently asked about garage door motor replacement
Top questions homeowners searching for Garage Door Motor Replacement near me ask us:
Under 8 years old: motor swap almost always. 8–12 years: depends on overall condition. 12+ years: full opener replacement usually better long-term.
Yes — capacitor test is part of the diagnostic. If it's just the cap, you save the motor replacement cost.
Light non-insulated: 1/2 HP. Standard insulated: 3/4 HP. Heavy insulated or oversized: 1.25 HPS. We size by measured door weight, not assumptions.
90–120 minutes including diagnostic, motor swap, travel and force programming, and obstruction test.
2 years parts and labor on motor replacement. Manufacturer coverage on the motor itself varies (LiftMaster 5–10 years, Genie 5 years).