Synology NAS Error Code 37: How to Fix It

Q: What does Synology Error Code 37 mean?

Synology Error Code 37 means that DSM has detected a power supply failure on your NAS device. This is a critical hardware alert indicating that the power supply unit (PSU) or external power adapter is not functioning correctly, which can interrupt data access and potentially damage your drives or NAS hardware if not addressed promptly.

Q: Will I lose my data if I get Error Code 37 on my Synology NAS?

A power supply failure itself does not immediately delete your data — your files remain on the hard drives. However, if the NAS shuts down unexpectedly due to PSU failure, any writes in progress may be corrupted, and RAID arrays could be left in a degraded or inconsistent state. Once you replace the PSU and restore power, DSM should perform a consistency check. It is critical to have an offsite or cloud backup (such as Hyper Backup to Synology C2) before attempting any hardware repair.

Q: Can I replace the Synology NAS power supply myself?

Yes, for most Synology models this is a DIY-friendly repair of medium difficulty. External power adapters are straightforward to swap. Internal PSUs on rack-mounted or enterprise models are also replaceable, and some models support hot-swappable redundant PSUs so you do not even need to power down the unit. Always ensure you source a replacement PSU that matches your model's exact power specifications.

Q: How do I find the right replacement power supply for my Synology NAS?

Check the label on your current power supply or external power adapter — it will list the required output voltage (V) and amperage (A). You can also find hardware specifications for your exact NAS model on Synology's official website under 'Product > Spec.' Search for a replacement using those specifications, ensuring it matches the form factor (internal vs. external adapter). For enterprise or rack models, contact Synology or an authorized reseller for compatible spare parts.

Q: Why does my Synology NAS keep showing Error Code 37 even after replacing the power supply?

If Error Code 37 persists after a verified PSU replacement, it may indicate that the original power supply failure caused secondary damage to the NAS motherboard, drive backplane, or power regulation circuitry. It could also be a firmware-level issue where the error log has not yet cleared — try rebooting the NAS and checking DSM logs again. If the error truly persists with a known-good PSU, contact Synology technical support, as the unit may need professional diagnostics or warranty service.

Abstract

Synology NAS Error Code 37 indicates a power supply failure within your Synology DiskStation or RackStation device running DSM (DiskStation Manager). This is a critical error because a failing or failed power supply can interrupt data access, corrupt files, or permanently damage your drives and NAS hardware. Acting quickly is essential — do not ignore this error, as continued operation under a faulty power supply puts your data and device at serious risk.