Erreur 046

What is the name of the manufacturer and model of the equipment you are working on? 

Error 046 – Discharge Temperature on the Cynosure Icon usually points to a cooling issue.

I'd check:

• Coolant level and look for leaks
• Coolant pump operation and flow
• Fans and radiator for proper airflow
• Coolant filter (if equipped) for blockage
• Temperature sensor connections

If the error returns after the unit has cooled down, I'd suspect poor coolant circulation (pump or blockage) or a faulty temperature sensor rather than the laser itself.