Press and hold the P button for 20 seconds until all LEDs flash three times. This erases all remotes and limit settings.
You do not need an original paper manual if you understand the LED blink codes. The Hormann A445 manual includes a diagnostic table. Here is the digital version: hormann a445 manual
| LED Signal | Meaning | Solution | | :--- | :--- | :--- | | 1 Flash, pause | No power or control board dead | Check outlet, fuse, or transformer. | | 2 Flashes | Photocell beam obstructed or misaligned | Clean lenses; adjust brackets so red LED on sensor is solid. | | 3 Flashes | Motor overheated | Wait 20 minutes. The A445 has auto-reset thermal protection. | | 4 Flashes | Travel limit not set | Perform the "Setting Travel Limits" sequence above. | | 5 Flashes | Force measurement error | Check door balance. Disconnect opener; lift door manually. It should be smooth. Re-learn limits. | | Constant fast flash | Remote code memory full | Delete all codes (press Learn button for 10 seconds) and re-pair. | Press and hold the P button for 20
Your Hörmann A445 manual includes a maintenance checklist. Follow it every 6 months: Note: The A445 chain drive is marketed as "maintenance-free
Note: The A445 chain drive is marketed as "maintenance-free." However, the manual clarifies this applies only to the internal gearbox. The external chain benefits from light lubrication in dusty environments.
Check the 24V AC output on the control board. If voltage is present, the wall button is faulty. If not, the logic board may have a blown fuse (often located next to the terminal strip).