> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/instrumentation/iseq-100/instrumentation-iseq-100-reference_material-list/000001882.md).
# Air Filter replacement on the iSeq 100
The Air Filter on the iSeq 100 is a single-use foam piece that covers the two fans on the back of the instrument; it ensures proper cooling and prevents debris from entering the system. The Air Filter must be replaced every 6 months. The instrument generates a pop-up notification indicating it is time to change the Air Filter. The instrument ships with one installed and one spare. Keep the Air Filter in its package until use.
If the instrument is under an active Illumina service contract, Illumina Technical Support (TS) can provide an iSeq 100 Spare Air Filter as needed. When the instrument is not under warranty, replacements are user-supplied.
iSeq 100 Spare Air Filter catalog number for ordering: **20023928.**
**How to Replace an iSeq Air Filter:**
More information, reference [iSeq 100 Sequencing System Guide](https://support-docs.illumina.com/IN/iSeq100/Content/IN/iSeq/Maintenance.htm)
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| *For any feedback or questions regarding this article (Illumina Knowledge Article #1882), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000001882%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |
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