When a garage door opener replacement makes sense
Age on its own does not settle it. The usual reasons are a motor that keeps stopping after repairs, a new or heavier door, or something the old unit cannot do, such as run through a power cut or answer a phone.
One test moves the job up the list. If the door does not reverse when it meets an object, Steel-Line's manual says to have the opener repaired, and that fault deserves a straight answer from the door specialist: is this one worth repairing, or is it time for a new motor?
Check the door before the old motor comes down
A motor that has worn out may have been working too hard. B&D's Smart Pro manual says it is natural for springs to lose tension over time, and B&D rates its springs in cycles: 10,000 on Panelift, 20,000 on Panelift Icon and 30,000 on Roll-A-Door. Steel-Line says an out-of-balance roller door strains the motor.
So ask the door specialist to look at the springs, cables and tracks as part of the job. A new motor bolted to a tired door inherits the same load that wore out the last one.
Sectional door openers: how the makers set them up
| Drive or mount | Worth knowing | |
|---|---|---|
| Steel-Line SD1500 Pro | Belt drive up to 210 kg, chain drive from 210 to 250 kg | The door's weight picks the drive |
| Steel-Line Multi Drive 1500 Pro | Side mounted as standard | A rail and belt drive adapter is sold separately for a ceiling mount |
| Marantec Comfort, sold by Steel-Line | One-piece rail with belt drive | Steel-Line says it is not available in WA |
| Merlin Commander Ultimate MJ3800MYQ | Wall mounted, which Merlin says clears overhead space | Merlin lists built-in battery backup, an automatic door lock and inbuilt Wi-Fi |
Matching the new motor to your door
Those are examples, and each maker has more. B&D and Merlin do not state chain or belt on their opener pages, so ask about drive type if the door is heavy. Steel-Line says a sectional door can approach or exceed 200kg, so weight sits near the top of the list.
Most swaps keep the old door. Steel-Line says its sectional openers can be fitted to most popular brands of sectional door, with accessories to suit. Tilt doors have fewer choices: Merlin lists its Commander Elite MS105MYQ and Commander Elite II MS107MYQ for them, and says myQ phone control does not work on a tilt door. Roller doors take their own openers, covered under roller door motors.
Space can change too. Steel-Line says to add 50mm to its minimum sectional headroom when an opener is fitted, and B&D's Smart Pro manual wants at least 57mm between the highest point of the door's travel and the ceiling. It also says the opener must sit in a dry spot, protected from weather.
A different motor can move the power point
A like-for-like swap often sits where the old one did. Move from a rail to a side or wall mount and the power need moves as well. On the ceiling within an arm's length of the opener is where B&D's Smart Pro manual wants its earthed 3 pin power point, put in by a qualified electrical contractor.
A new power point in a new spot, or a hard-wired opener, is electrical work, and in every state that part goes to a licensed electrician. Ask about this before you settle on a model, so nobody finds out on the day.
Questions to ask before you choose
- Does this opener suit my door's type and weight?
- Will it sit where the old one is, or does the power point need to move?
- Will my remotes and wall button still work, or do I need new ones?
- Are safety beams included, and do I need them for phone control?
- Is battery backup built in, or is it an add-on?
- How often does the warranty want the opener serviced?
The old motor is holding more than you think
Once the opener is disconnected, the door relies on its springs alone. Merlin warns that a door with weak or broken springs may fall rapidly, and Chamberlain says that can happen without warning. Steel-Line's manual says repairs and adjustments, especially to the cables and spring assembly, should be done only by a trained door technician. Do not take an old motor down yourself.
What you can do first, and what to leave
You can
- Photograph the motor's label and the power point near it
- Count the remotes and wall buttons you want to keep
- Dig out any warranty or service papers
- Run the monthly reversing test and note the result
Leave to a door specialist
- Taking down the old motor and fitting the new one
- Setting up the new opener and its safety features
- Springs, cables and tracks
- A new power point or hard wiring, by a licensed electrician
What we would do
Ask to see the new opener pass a reversing test with you watching, and to be shown the manual release before the door specialist leaves. B&D's Smart Pro manual says that after installation the opener must reverse when the door touches a 40 mm high object on the floor. It is a small ask, and you will know how the new unit behaves from the first day.