Hardware Failure

Palo Alto Networks PA-220 fan tray failed: Diagnose & Fix

Q: Where can I find the Palo Alto Networks official documentation?

https://knowledgebase.paloaltonetworks.com — search the product family + feature name.

By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-30

⚡ At a glance

Vendor	Palo Alto Networks
Operating system	PAN-OS
Category	Hardware Failure
Skill level	Intermediate to advanced
DIY-able?	Yes with CLI access; some scenarios need Palo Alto TAC + RMA.

Across years of operating Palo Alto Networks gear I have watched the same hardware-failure pattern repeat: a unit ships fine, runs for two years, then trips on a power-event or a thermal excursion. On PAN-OS the recovery path is the same whether the affected unit is from the PA-220 family or something newer.

Before you touch anything, capture state. `show system info` and `show system environmentals` dumped to a file is worth more than a screen-cap because Palo Alto TAC will ask for the exact output when you open the case. Keep the artifact even if the box recovers on its own.

Below I walk through the on-box steps first, then the Palo Alto TAC escalation path. If you have spares on hand, swap-then-diagnose is usually faster than diagnose-then-swap: but only if you can afford the rack time.

What this guide covers

Diagnose and recover from fan tray failed on a Palo Alto Networks PA-220.

Step-by-step

Identify which fan failed via the environmental status command.
Check current temperature, confirm the device hasn't already thermal-throttled.
Note the fan part number.
Replace the fan tray. most are hot-swappable but have a limited thermal window.
After replacement, confirm all fans show OK.

CLI / commands

# Verify hardware state
show system info
show system state filter sys.s1.p*
show system environmentals

# Collect for Palo Alto TAC
tftp export tech-support to 10.10.1.100

When to RMA

Repeated failure after re-seat and power-cycle
Visible burn, scorching, or physical damage
POST or memory diagnostic failure
Hardware crashinfo without a software workaround

Frequently asked questions

Will this work on my specific PAN-OS version?

The procedure reflects current PAN-OS behaviour. Older releases may need minor syntax adjustments, use the CLI help (? or tab-completion) to verify.

Should I open a Palo Alto TAC case immediately?

Open one if you suspect hardware failure or the symptom persists after a maintenance-window reload. Make sure your support entitlement is active first.

Where can I find the Palo Alto Networks official documentation?

https://knowledgebase.paloaltonetworks.com: search the product family + feature name.

Is this procedure safe in production?

Test in a lab or maintenance window first. Capture pre-change state so you can roll back.

All Palo Alto Networks fix guides → /paloalto/
All vendor guides → /vendors/

Related guides worth a look while you sort this one out:

References

Palo Alto Networks support portal: https://support.paloaltonetworks.com
Palo Alto Networks knowledge base: https://knowledgebase.paloaltonetworks.com
Palo Alto Networks security advisories: https://security.paloaltonetworks.com
Open a case: https://support.paloaltonetworks.com/Support/Index

Reference material, not professional advice. Validate against your specific PAN-OS version and test in a non-production environment before applying.

What changed recently?

Fault diagnosis on a Palo device goes faster when you map the symptom to a recent change:

Did firmware update in the last 7 days?
Did the network (router, ISP, VPN) change?
Was the device moved physically?
Did paired devices (phone, hub, app) update?
Were any accessories swapped in or out?

The answer narrows the root cause to a manageable subset.

Safety + preconditions

Before any work on a Palo device:

Unplug from mains for any internal-access procedure.
Discharge stored energy (capacitors in PSUs, residual battery charge) per manufacturer guidance.
Use ESD-safe handling for boards and modules, no carpet, no wool sleeves.
Avoid moisture; never apply liquids near vents or connectors.
If you smell smoke, see scorch marks, or feel uneven heat, stop and escalate.

How to confirm it's actually fixed

On a Palo device, the test is rarely "reboot and see". Use this list:

Active reproduction: trigger the original failure path on purpose.
Indirect reproduction: do an activity that would expose the same subsystem.
Status indicator review: every LED / display / app status should be green.
24-hour soak: leave the device under normal load overnight; check the next morning.
Telemetry check: review the device or app's diagnostic log for new error entries.

Escalation guide

For a Palo device, the right escalation depends on impact:

Cosmetic / minor: log a ticket via the Palo app or web portal. Response 1-3 business days.
Mid-impact: phone support. Have your serial number ready.
Critical (production down, safety issue): in-person dealer / TAC visit. Bring proof of purchase.
Out of warranty: third-party repair shop with manufacturer-certified technicians.