How would you monitor the temperature of the corsair RMX PSU?
Not every PSU comes with sensors installed to monitor the temperature and other parameters of your PSU. Unfortunately, the corsair RMS does not have sensors to monitor the temperature, efficiency, etc.
The only way you can monitor the temperature of your PSU is experiencing shutting down your PC. As these are the only few ways by which you can feel that your PC is getting too hot. Another way is feeling too much hot air coming out from your PSU. Shutdowns are the most common way of knowing that your PSU is getting too hot.
How To Fix If Corsair PSU Fan Not Spinning Problem
The RMS series from Corsair is the newest one from the company. The Fans of this PSU are designed to not spin until the load reaches 40% because of the ECO mode. But there is a fault in your PSU if it doesn’t start spinning even after the heavy tasking and load crossing the 40 percent mark. So here are the few methods you can try to fix the Fan spinning issue.
Temperature
The main reason your PSU fan stopped spinning is because of the high temperature. If you are under 40% load and the fan is not spinning. This is not the problem; this is one of the features of the corsair PSU. It is designed in a way that won’t turn on until your PC needs it.
So, if you are playing high-end games or streaming 4k videos online, and your PSU is still silent, then there might be a problem. The only fix here is to shut down the PC and wait for the machine to cool down, and turn it on again.
Using Corsair Link
The fan status of the corsair RMX PSU can be checked by the digital interface specially designed to link up your PSU with the digital interface using the cable provided with the PSU box. The fan status can be checked from this digital interface.

The digital interface will also allow you to increase and decrease fan speed. And you can also check if your fan is spinning or not. But keep in mind that Corsair RMX is designed in a way that the fan won’t start until it reaches the CPU temperature of 40 degrees Celsius.
If your fan won’t start spinning even at 50 degrees, then you might have a very good cooling system installed on your PC.
Using the Corsair Support
In most cases, it is not the fan that is at fault. The Corsair PSUs are designed in a way that, it starts spinning only after reaching a certain temperature which is 40 degrees Celsius in this case. However, if you are very much sure that, you are on a heavy load and the fan is not spinning at all. Then there might be a problem with the fan.
Conclusion
If you are facing this exact issue, then this might be the time for the expert to enter the scene. Yes, it would be best to ask Corsair for support about your existing problem. You can send an email to corsair support, or you can call their Toll Free number at 00800 700 22700, or just go through this link and submit the ticket.