--- title: Naboo - How do you solve the error message “A37 inverter 2 thermal alarm”? description: A37 Thermal alarm Inverter 2 warns of a problem with the inverter that controls the chamber fan. As consequence unit stop any function. 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[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 “A37 inverter 2 thermal alarm”? A37 Thermal alarm Inverter 2 warns of a problem with the inverter that controls the chamber fan. As consequence unit stop any function. **This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions**. ### ![](https://support.lainox.com/hs-fs/hubfs/image-png-Sep-29-2023-03-28-36-7370-PM.png?width=311&height=184&name=image-png-Sep-29-2023-03-28-36-7370-PM.png) ### Description The inverter detects an overtemperature on the heatsink for more than 5 seconds. Red LED show a sequence of 3 flashes. ### Warning Inverter capacitors can be charged, before any action disconnect the power supply. Always check the conditions around the inverter and the motor (presence of water leaks, visible damage, etc.). ### Reset To reset the error message set the P216 to 0. ### Checks Perform the following checks: - Check the inverter - Check cooling fans and heat sources - Check impedance of motor windings - Check wirings - Check power supply - Chech for meccanical blockage fan/motor - [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