Is there one reset button?
Not as a rule. When people talk about resetting a garage door opener, they usually mean one of three jobs: restarting it at the power, erasing the remote codes, or clearing the travel limits so it relearns where the door stops. Some manuals add a fourth, a controller memory reset.
Each fixes a different problem, and two of them wipe settings you then have to put back. Match the reset to what went wrong using the table below, then follow the manual for your model. Dominator's manuals page tells owners to check the model number to get the correct one.
Which reset fits the problem
| What the manuals point to | Who does it | |
|---|---|---|
| A remote is lost or stolen | Erase every remote, then code back the ones you keep | You, with the manual |
| You have just moved in | Erase every remote and start again with your own | You, with the manual |
| The opener went dead in a power cut | Restart it at the power, then read its lights | You |
| The door stops short or won't shut fully | Clear and set the travel limits, then test the reverse | Usually a door specialist |
| The opener is flashing a fault | Look up the code for your model before resetting | Depends on the code |
| The door is heavy, crooked or jammed | No reset at all: stop using it | A door specialist |
Restarting the opener at the power
This is the gentlest reset, and on its own it clears nothing. Dominator's manual puts the opener's power point on the ceiling within arm's length of the opener, so you may need a steady ladder to reach the switch.
Dominator's Excel (RDO-1V4) manual and ATA's GDO-6 V4 EasyRoller manual give the same check: remove every power source, backup battery included, wait 10 to 15 seconds until all the lights are out, then reconnect. If a red LED is flashing when it wakes up, the travel limits are not set and need setting again.
Merlin's MR855EVO manual uses a restart for one fault in particular. When the opener shows diagnostic code 2 then 1, a possible circuit board memory failure, turn the mains off, turn it on again after 15 seconds, and then reprogram the door travel limits and force settings.
Resetting a garage door opener after a power cut
When the power comes back, look at the opener's lights before you press anything. If yours has a backup battery, give it time to recover: Dominator's Excel manual says a door that stops or crawls may have flat backup batteries, which can take 24 to 48 hours to charge on mains power.
Some settings stay locked while the opener runs on its battery. Dominator's Smart Pro, Smart and Secure manual says the limits can't be set on battery backup, and the Excel manual says remotes can't be coded then either. Wait for mains power before trying either.
If you released the door by hand during the cut, it has to be reconnected to the opener before the remote will move it. The steps vary by model, so use the manual. Opening a garage door without power covers the release side of it.
Erasing the remote codes
This is the reset for a stolen remote, a new house, or any remote you no longer trust. It clears every stored remote at once, the ones in your own pocket included, so gather them all before you start.
On Dominator's Smart Pro, Smart and Secure, the manual says to take the controls cover off, press MODE until the remote LED lights, then hold the button for 10 seconds and let go when the flashing and beeping stop. The Excel (RDO-1V4) does it with one long press: 6 seconds on its code set button, until the LED flashes rapidly.
After that, code each remote you are keeping back in, using how to program a garage door remote. Merlin's MT3850EVO manual sets out the same order for a door that opens to a neighbour's remote: wipe the memory first, then reprogram yours.
Clearing and resetting the travel limits
The limits tell the opener where to stop at the top and at the bottom. Dominator's sectional door opener manual sets the close limit where the door first touches the ground and the open limit at the height of the opening. It warns against forcing the door into the floor, because that can interfere with the manual release.
On the Smart Pro, Smart and Secure, the manual clears the limits by pressing MODE until the gear LED lights and holding for 10 seconds until the light stops flashing. The Excel needs a 6 second hold until its LED flashes quickly, and ATA's GDO-6 V4 clears them with a 6 second hold on CLOSE. All three go back to their original settings if nothing is done for 30 seconds.
Once new limits are in, Dominator's sectional door openers run the door open and shut by themselves to work out their obstruction settings. If the travel changed after a mechanical adjustment and the limits are still set, both Dominator manuals offer re-profiling, which relearns the travel without clearing anything.
We would leave limits to a door specialist unless the manual is open in front of you and the door ran well until now. Dominator's service book lists travel limits and force among the checks made at each service, and whoever sets them should finish with the reverse test in the safety guide.
Does a factory reset erase my remotes?
Often not, which surprises people. Dominator's manuals describe a controller memory reset that puts the control memory back to factory defaults but keeps the stored remotes, the history log and the cycle counters, and both say to clear the limits first. ATA's GDO-6 V4 manual also says a factory reset will not erase transmitter codes.
Gate boards can work the other way. BFT's manual for its MERAK BT A control board says a factory reset deletes all saved remotes, so read the manual before resetting anything on an electric gate.
When a reset is the wrong fix
A reset only changes what the opener remembers. It does nothing for a door that is heavy, crooked, jammed or off its track. Dominator's opener manual says doors, springs, brackets and their hardware are under extreme tension, and not to use a door that needs repair. Its Smart Pro, Smart and Secure manual adds that if the door fails its safety tests, put the opener into manual mode, run the door by hand only and call for service.
What to tell the door specialist
- Anything that happened since the opener last worked, such as a storm, a power cut or a jolt to the door
- What the lights on the opener are doing now
- How easily the door moves by hand
- The model, which Dominator prints on the rear of its openers
- Who fitted it and when, often on a sticker on the back of the garage door
- Which resets you have already tried
What you can do, and what to leave
You can
- Restart the opener at its power point
- Erase and recode remotes with the manual
- Let a backup battery recharge
- Run the reverse test after any change
Leave to a door specialist
- Travel limits and force without a manual
- Fault codes that keep coming back
- A door that is heavy or out of balance
- Anything inside the opener or a gate control box
What we would do
Before erasing the codes, put every remote in the house on the kitchen bench and count them. Once the memory is wiped, any remote you forgot about stops working, and the ones you code back are the only ones that open the door. It is also the moment to retire the old spare nobody uses, with its battery put well out of children's reach.