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Forum Discussion
nulled
Apr 06, 2026Aspirant
Failing ReadyNAS Ultra 4 Plus
I noticed one morning my NAS had powered down and couldn't turn it back on. After turning the power off to it completely and waiting a couple of minutes, it turned back on. Strangely it then turns of...
Sandshark
Apr 08, 2026Sensei
That plastic air dam is critical in making sure the airflow gets into the power supply since the original has no PSU fan. So are some of the additional holes in the top cover. Unless you buy a supply that has a fan mounted on the end opposite the power cord socket, you need to do something to make sure there is sufficient PSU airflow. A fan on the other end has nowhere to blow and does nothing. With many, the best thing to do is swap the top cover and air dam with the original and disconnect the fan. Some aluminum tape can be used to keep the air dam in place.
nulled
Apr 08, 2026Aspirant
Ok great thanks for the info. The Seasonic has a fan adjacent to the power socket so should be fine. If I disconnect it due to noise etc I'll make sure to have the air dam in place.
- SandsharkApr 09, 2026Sensei
To be useful in a legacy ReadyNAS, the fan must be on the other end. Unless you cut a hole for it, a fan on the power socket end has nowhere to exhaust. One on the other end typically blows in, not out and isn't blocked by the chassis. Even reversing the fan on the power cord end won't help, as it will then have a blocked inlet as well as be fighting the chassis fan.
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