--- title: Oracle - How do you solve the error message A02? description: Message warns that chamber safety thermostat F2 switch. As consequence C6 will open deactivating any function and generating the message. 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[Home](https://support.lainox.com/en/knowledge) 2. [Oracle](https://support.lainox.com/en/knowledge/oracle) 3. [Messages](https://support.lainox.com/en/knowledge/oracle#messages) # Oracle - How do you solve the error message A02? Message warns that chamber safety thermostat F2 switch. As consequence C6 will open deactivating any function and generating the message. **This message does not necessarily require the intervention of an authorized technician; the causes of the failure may be due to external causes if the problem recurs is needed the intervention of a technician.**  ### **DESCRIPTION** The thermal safety of the chamber intervenes when the limit temperature in the chamber, 375°C / 707°F, is exceeded and opens a normally closed contact. The control board receives power on inputs 1 and 5 from the thermostat contact; in the event of a power failure on these inputs, the error message is generated. ### WARNING The intervention also takes place if the temperatures drop close to 0°C / 32°F. The intervention of the safety thermostat removes voltage from C6 (O-6) which cuts off power to the unit ### RESET Open front panel and reactivate the thermal safety pressing the reset button. ### CHECKS Perform following checks: - If the machine has remained exposed to the intense cold - The EG fuse - The absorptions on the phases, must be about 0A with the machine in standby. - C6 contacts must be opened with the unit turned off in case they remain closed change C6. - That the motor is working properly and that the fan cools the resistances. - [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