A burned-out motor is one of the most common reasons a commercial automatic door stops working entirely. When the motor fails, the door won't move — even if everything else is functioning. KDL Locksmith sources and installs replacement motors for all major automatic door brands including Dormakaba, Horton, Tormax, Besam, Micom, Ditec, Rhinotek, and Hunter. We serve Toronto and the GTA with same-day service. Most motor replacements are completed in a single visit.

Signs Your Automatic Door Motor Has Failed

These are the clearest signs the motor — not the sensor or controller — is the problem:

• The door doesn't move at all, but the control panel has power and shows no error code
• You can hear a humming or buzzing sound from the operator unit but the door won't move
• The door moves a few inches then stops, even after a reset
• Burning smell coming from the operator unit
• The motor feels hot or warm to the touch even when the door hasn't been used recently
• The door stopped suddenly after heavy use — a sign of overheating
• Drive belt is intact and track is clear — but the door still won't move

What Causes Automatic Door Motors to Burn Out?

Age and Wear

Most automatic door motors are rated for 10–15 years of normal use. High-traffic doors — supermarket entrances, hospital lobbies, office buildings — can wear out a motor in 5–7 years. This is normal and expected.

Overloading

If a door was upgraded (heavier glass, added security panels) without upgrading the operator, the motor runs at above-rated load every cycle. Over time, this burns out the motor windings. This is especially common with storefront glass doors.

Power Surges

A voltage spike from a lightning strike, utility fault, or generator switchover can burn out motor windings instantly. If the motor failed immediately after an electrical event, a surge is likely the cause.

Lack of Maintenance

Worn rollers, dirty tracks, and misaligned doors force the motor to work harder than designed. Regular maintenance prevents premature motor burnout.

Repair vs. Replace: Which Is Right?

In most cases, a burned-out motor means full motor replacement. The question is whether to replace the motor only or the entire operator unit.

Replace the motor only when:

• The operator unit is less than 8 years old
• The controller board, sensors, and drive system are all working
• A direct replacement motor is available for your brand and model

Replace the entire operator when:

• The unit is over 10 years old and other components are showing wear
• The replacement motor costs more than 60% of a new unit
• Parts are discontinued for your model (common with older Besam, Micom, and Rhinotek units)

We'll give you an honest recommendation on-site — we don't push full replacements if a motor swap will solve the problem.

Brands We Replace Motors For

• Dormakaba (ED series, BTS series, Kaba Gilgen)
• Horton (Series 4000, 8000, Comfort)
• Tormax (iMotion, SLIMDRIVE)
• Besam (SL500, UniSlide, UNI-Auto)
• Micom
• Ditec (GOL series, COMS)
• Rhinotek
• Hunter

Frequently Asked Questions

How much does it cost to replace an automatic door motor in Toronto?

Automatic door motor replacement typically costs $400–$900 CAD including parts and labour, depending on the brand and model. We quote before starting any work. Call 416-303-0255 for an estimate.

My door makes a humming sound but won't move — is that the motor?

Yes, almost certainly. A humming sound with no movement means the motor is receiving power but the windings are seized or burned. The motor needs replacement.

How do I know if it's the motor or the controller board?

If the panel has power and shows no error codes, but the door doesn't move and you hear a hum — it's the motor. If the panel shows error codes or flashing lights, the controller board is more likely. A technician can confirm in minutes.

Do you offer preventive maintenance to avoid motor burnout?

Yes. KDL Locksmith offers maintenance contracts for commercial automatic doors in Toronto and the GTA. Regular service extends motor life significantly and prevents unexpected failures. Call 416-303-0255.