--- title: Naboo - How do you solve the error message “A01 fan safety alarm”? description: A01 Fan safety alarm worn that the safety switch into the motor open and inlet 25 of I/O PCB do not detect power line. As consequence unit stops immediately heating and active functions and show menti --- [Skip to content](https://support.lainox.com/en/knowledge/naboo-how-to-resolve-error-message-a01-fan-safety-alarm#main-content) - [English](https://support.lainox.com/en/knowledge/naboo-how-to-resolve-error-message-a01-fan-safety-alarm) - [Deutsch](https://support.lainox.com/de/knowledge/naboo-wie-löst-man-das-problem-der-fehlermeldung-a01-alarm-sicherheitseinrichtung-lüfter) - [Español](https://support.lainox.com/es/knowledge/naboo-cómo-resolver-un-mensaje-de-error-a01-alarma-de-seguridad-de-los-ventiladores) - [Français](https://support.lainox.com/fr/knowledge/naboo-comment-résoudre-le-message-derreur-a01-alarme-sécurité-ventilateurs) - [Italiano](https://support.lainox.com/knowledge/support.lainox.com/knowledge/naboo-come-risolvere-messaggio-errore-a01-allarme-sicurezza-ventole) English Show submenu for translations ![LAINOX bianco 500.png\]](https://support.lainox.com/hs-fs/hubfs/LAINOX%20bianco%20500.png?height=40&name=LAINOX%20bianco%20500.png) Open main navigation Close main navigation - - [English](https://support.lainox.com/en/knowledge/naboo-how-to-resolve-error-message-a01-fan-safety-alarm) - [Deutsch](https://support.lainox.com/de/knowledge/naboo-wie-löst-man-das-problem-der-fehlermeldung-a01-alarm-sicherheitseinrichtung-lüfter) - [Español](https://support.lainox.com/es/knowledge/naboo-cómo-resolver-un-mensaje-de-error-a01-alarma-de-seguridad-de-los-ventiladores) - [Français](https://support.lainox.com/fr/knowledge/naboo-comment-résoudre-le-message-derreur-a01-alarme-sécurité-ventilateurs) - [Italiano](https://support.lainox.com/knowledge/support.lainox.com/knowledge/naboo-come-risolvere-messaggio-errore-a01-allarme-sicurezza-ventole) English Show submenu for translations - [Go to Lainox.com](https://www.lainox.com/) [Go to Lainox.com](https://www.lainox.com/) Lainox Support - There are no suggestions because the search field is empty. 1. [Home](https://support.lainox.com/en/knowledge) 2. [Naboo](https://support.lainox.com/en/knowledge/naboo) 3. [Messages](https://support.lainox.com/en/knowledge/naboo#messages) # Naboo - How do you solve the error message “A01 fan safety alarm”? A01 Fan safety alarm worn that the safety switch into the motor open and inlet 25 of I/O PCB do not detect power line. As consequence unit stops immediately heating and active functions and show mentioned message. **This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions.** ### ![](https://support.lainox.com/hubfs/image-png-1.png) ### Description Since 04/2019 fan motor has internally a thermic switch that has to open when exceeding 150°C/ 302°F. Motor overheating can generate critical issues; when contact cool down it closes but P377=1 blocks the unit. ### Reset To reset the message proceed as following:  A) Enter service level  B) Enter Prameters menu  C) Settle P377=0 and save  D) Exit from service level.  E) Check if unit works properly and investigate on reason of intervention. ### Checks Perform following checks:  \- Check motor and bearings  \- Check C6 contacts  \- Check proper installation (no heat sources and space for cooling air flow) and cooling fans \- Check P301 \<04/2019=0 \>04/2019=5 \- Change the motor if protection stay open or if exists a mechanical issue. - [Naboo](https://support.lainox.com/en/knowledge/naboo#main-content) - [Installation](https://support.lainox.com/en/knowledge/naboo#installation) - [Use](https://support.lainox.com/en/knowledge/naboo#use) - [Messages](https://support.lainox.com/en/knowledge/naboo#messages) - [How to](https://support.lainox.com/en/knowledge/naboo#how-to) - [How it works](https://support.lainox.com/en/knowledge/naboo#how-it-works) - [Sapiens](https://support.lainox.com/en/knowledge/sapiens#main-content) - [Installation](https://support.lainox.com/en/knowledge/sapiens#installation) - [Use](https://support.lainox.com/en/knowledge/sapiens#use) - [Messages](https://support.lainox.com/en/knowledge/sapiens#messages) - [How to](https://support.lainox.com/en/knowledge/sapiens#how-to) - [How it works](https://support.lainox.com/en/knowledge/sapiens#how-it-works) - [Neo24hours](https://support.lainox.com/en/knowledge/neo24hours#main-content) - [Installation](https://support.lainox.com/en/knowledge/neo24hours#installation) - [Use](https://support.lainox.com/en/knowledge/neo24hours#use) - [Messages](https://support.lainox.com/en/knowledge/neo24hours#messages) - [How to](https://support.lainox.com/en/knowledge/neo24hours#how-to) - [How it works](https://support.lainox.com/en/knowledge/neo24hours#how-it-works) - [Oracle](https://support.lainox.com/en/knowledge/oracle#main-content) - [Installation](https://support.lainox.com/en/knowledge/oracle#installation) - [Use](https://support.lainox.com/en/knowledge/oracle#use) - [Messages](https://support.lainox.com/en/knowledge/oracle#messages) - [How to](https://support.lainox.com/en/knowledge/oracle#how-to) - [How it works](https://support.lainox.com/en/knowledge/oracle#how-it-works) - [Puff](https://support.lainox.com/en/knowledge/puff#main-content) - [Installation](https://support.lainox.com/en/knowledge/puff#installation) - [Use](https://support.lainox.com/en/knowledge/puff#use) - [Messages](https://support.lainox.com/en/knowledge/puff#messages) - [How to](https://support.lainox.com/en/knowledge/puff#how-to) - [How it works](https://support.lainox.com/en/knowledge/puff#how-it-works) - [Zoom](https://support.lainox.com/en/knowledge/zoom#main-content) - [Installation](https://support.lainox.com/en/knowledge/zoom#installation) - [Use](https://support.lainox.com/en/knowledge/zoom#use) - [Messages](https://support.lainox.com/en/knowledge/zoom#messages) - [How to](https://support.lainox.com/en/knowledge/zoom#how-to) - [How it works](https://support.lainox.com/en/knowledge/zoom#how-it-works) [![Chill listening crop-3](https://support.lainox.com/hs-fs/hubfs/LAINOX-1.png?width=88&height=24&name=LAINOX-1.png "Chill listening crop-3")](https://lainox.com/) Copyright © 2026, LAINOX Ali Group S.r.l. a Socio Unico