Garage door remotes: replacement, coding and receivers

A garage remote has to speak the same language as the receiver in your motor, and the receiver decides, not the remote. Most current garage motors use code-hopping (rolling code) remotes, which change their code every time they're pressed so they can't be copied: Centurion's SDO4 has a code-hopping 433 MHz receiver, Hydro Doors uses code-hopping on the Digi One and rolling code at 433.92 MHz on the Digi 6.

The surest way to get the right remote is to bring us the old one, or a photo of its back and of the motor's label. Remotes that look alike can belong to different systems, and a remote bought by appearance alone often won't learn.

Every receiver has a fixed number of places, and once they're full it won't take another:

The receiver tells you when it's full: ET's DC Blue gives ten beeps, the DC Blue Digital flashes rapidly, and the Digi One shows Fu. In a busy household, a full receiver is usually full of remotes nobody has any more, and clearing them out frees the places.

Coding a remote means putting the receiver into learn mode and pressing the remote's button so the receiver stores it. The makers each do it their own way:

• Digidoor Digi One: press CODE on the motor so it shows Su, press the remote button you want, then press the same button again to confirm. Su flashes, then -- shows.
• Digidoor Digi 6: remotes supplied with the motor come coded. For another, press CODE so a dot shows on the display, press the remote button, pause about two seconds, then press the same button again for about two seconds. The dot flashes to confirm.
• ET DC Blue Digital: hold the remote button down, then press and hold the receiver's Learn button until its light flashes: once for the first remote, twice when there's room for more.

The motor head is on the ceiling, so this means working from a ladder, close to the door's moving parts. If that isn't comfortable, it's a few minutes' job for us, and the original DC Blue's receiver is coded by bridging pins on its board, which is ours to do.

Each remote is coded on its own, one after another, with the same steps. Two things help:

• Code every button you'll use. On a four-button remote, each button is a separate code, so a button meant for the door, the light or the gate must each be learnt by the receiver it's meant for.
• Keep a list of who has which remote. When one goes missing, you'll know what needs replacing after the memory is cleared.

A multi-button remote can open the gate with one button and the garage with another, as long as both receivers accept that remote's system. Each button is coded to its own receiver. ET's BLU MIX remotes, for example, can be set per button, and ET notes that a BLU MIX button used on a DC Blue garage motor must be set to the older ET Blue code. Where the gate and the garage are different makes, one remote may not work both, and two remotes, or a keypad for one of them, is the honest answer. Our gate remotes page covers the gate side.

A lost garage remote is a key to your house, so it shouldn't stay in the receiver. On many garage motors, a single remote can't be removed on its own, so the memory is cleared and the remotes you still have are coded again:

• Digi One: holding CODE for about eight seconds deletes every remote; dL shows.
• Digi 6: holding CODE until C shows deletes all stored remotes.
• Digi 7: a long press of CODE clears every remote.

Clearing is easy; the work is recoding the rest. Bring every remote you still have to the motor before you start, or ask us to do both in one visit.

Hydro Doors' troubleshooting for the Digi One is a good rule for any motor: if the wall button works but one remote doesn't, it's that remote's battery or the remote itself; if a remote only works close to the door, its battery is low; if two or more remotes stop at once, look at the receiver. More checks are in our guide to remotes that don't work, and a door that won't move at all is covered in garage door not opening.

How far a garage remote reaches depends on the remote's battery, where the receiver sits, and what's between them, so the makers in our sources don't give one figure for it. A remote whose range shrinks over a few weeks almost always needs a battery. If a new battery doesn't help, the receiver's aerial or a new metal structure near the garage is the next thing to check.

Typical market prices from published cost guides and South African shops, not ours:

• New remote and programming: R350–R750 (Kandua)
• Remotes alone in shops: Centurion NOVA R210–R390 (1 to 4 buttons; Takealot); ET R240–R280 (Takealot); Gemini R200–R250 (Takealot)

Prices checked October 2026. Your exact price is set in a free quote before any work starts. No call-out fee when we do the work. If no work is done, a R650 call-out fee applies.

On the job card, give the motor's make if you know it, how many remotes you need, and whether any have been lost; a photo of an old remote helps us bring the right one. All our spare parts are genuine, and every repair comes with our six-month guarantee on our repairs. Same-day repairs are offered when the day allows. Garage motors themselves are on garage door repairs.