Hi Sam, I'm not aware of a SupraMatic a. What series is the operator? It should have a sticker on the side with a model number.

No. it is different for the series 2: To erase all codes from series 2 supramatic: 1. Press and hold the ‘PRG’ button. 2. After a few seconds the display should show a ‘1’ then a flashing ‘L’ 3. You can now release the ‘PRG’ button. 4. Press and release the ‘PRG’ button once -the display should show a ‘P’ then a flashing ‘0’ 5. Press and hold the ‘PRG’ button until the small ‘dot’ at the bottom right of the display also starts flashing, then release the ‘PRG’ button 6. Press and hold both the up and down arrow buttons until the ‘0.’ On the display reverts back to just the ‘0’ flashing without the dot illuminated. 7. Press and release the ‘PRG’ twice until the display shows ‘0’ ‐ after a few seconds the display will change to a line at the top of the display to indicate the door is in the open position and you have exited the programme mode.

The old supramatics usual had an external receiver. There should be a small grey box connected to the head unit with a wire (if it is a Hormann receiver). It should have a small button and a red LED next to it. If you hold down the button until the LED stops flashing it will erase all the codes.

@@coolhandnuke thank you so much.

@@coolhandnuke I found it, it's exactly as you described it. Before I cancel them all, how I can re-register the remote controls I want?

@@attikashipping8295 If you are erasing the codes because a hand transmitter has been lost or stolen then you need to wipe the codes from any existing hand transmitters as well. The receiver can only hold 1 code at a time so if multiple hand transmitters are working they are all clones, and coding one in to the receiver will make them all work. If you have purchased a new hand transmitter it will have a unique code, and coding this in will wipe the existing code ourt of the receiver. To code a hand transmitter in you need to prerss the receiver button once and its LED will flash. Now press and hold a button on the hand transmitter until the receiver flashes quickly. The hand transmitter is now coded in.

@@coolhandnuke yes, I did lost one remote control and I have 3 more that my family using. I need to erase all codes then to follow your instructions to re-register one of those three. I will follow your instructions. Thank you so much.