RSS Feed Not Updating? How to Diagnose and Fix It

Updated: 2026-09-27

Short answer: work through it in order rather than guessing. Load the feed URL directly in a browser and see whether the newest post is actually in the XML; rule out caching, which is the most common cause, from a CDN or a caching plugin serving a stale copy; check the polling interval of whatever reads the feed; look for a recent site or plugin change; and validate the feed's structure. A feed that stops updating almost always has one specific, findable cause.

A feed that stops updating almost always has a specific, findable cause rather than being randomly broken. Working through a short, ordered checklist catches the overwhelming majority of cases faster than guessing.

Step 1: Load the Feed URL Directly

Open your exact feed URL in a browser tab, separate from your site’s normal pages. If it loads an error page, a blank screen, or clearly stale content, the problem is on the feed-generation side (CMS, plugin, or server), not in whatever tool is supposed to be reading it. If it loads fine and shows your latest post, the feed itself is healthy and the problem is downstream.

Step 2: Rule Out Caching

A page-caching plugin or a CDN can serve a stale, previously-generated copy of your feed for minutes or hours after you publish something new, even though the live feed would show it if fetched fresh. Check whether your caching setup specifically excludes your feed URL (many caching plugins let you exclude paths like /feed/), or purge the cache and reload the feed URL to see if new content appears immediately after.

Step 3: Check the Actual Polling Interval

Automation and reader tools don’t watch your feed continuously — they check it on a schedule, often every few minutes to every hour depending on the plan or service. A post that “isn’t showing up” ten seconds after publishing usually just hasn’t been checked yet, not a broken integration. Confirm what interval your specific tool actually uses before assuming something is wrong.

Step 4: Look for a Recent Site Change

A CMS core update, a new SEO or caching plugin, or a theme change can silently alter feed output without changing how your site looks to a normal visitor. If a feed was working and stopped right after any site-side update, that update is the most likely suspect — re-check the raw feed output specifically, not just the site’s normal pages.

Step 5: Validate the Feed’s Structure

Run the feed through a validator to catch structural issues a browser might silently tolerate but an automation tool won’t — a malformed <pubDate>, a missing or duplicated <guid>, or broken XML can all cause tools to skip content or stop detecting new items correctly, even while the feed appears to “load” normally.

Step 6: Check the Settings of the Tool Reading the Feed

If the feed itself is healthy and current, but new items still do not appear on your social accounts, the cause is usually a setting in the auto-posting tool rather than a fault. In PostRSS, check these in order:

• Is the source active? A source or target that was switched off, or a social account whose authorization has expired, will not publish anything until it is turned on or reconnected.
• What is the start date? PostRSS posts items from the date you choose. Items older than that date are treated as history and skipped, so a post with an old publish date in the feed can look “missing”.
• Do keyword filters exclude it? Include and exclude filters are matched against the item title and description. One over-broad exclude word is enough to hold back a whole series of posts.
• Is it waiting for a posting window? On paid plans, posts can be limited to chosen hours or exact times. An item found at night will wait until the next allowed time.
• Was the per-update limit reached? If you published many items at once, the maximum number of posts per update spreads them over several checks.

Remember that PostRSS checks each feed as often as every minute, so allow for one check interval before troubleshooting.

Step 7: Look at the Item Identifiers

Auto-posting tools decide what is new by each item’s <guid> (or link). If an update to your CMS or a plugin changed how GUIDs are generated, a tool may either repost old items or treat new ones as already seen. Compare the GUIDs of two recent items before and after the change. Our guides on duplicate GUID problems and feed caching go deeper into both causes.

Frequently Asked Questions

My feed loads fine in a browser but my automation tool still isn’t posting. What’s wrong?

Check the tool’s own activity log first — most automation dashboards show what they last detected, which tells you whether the tool is seeing your feed correctly or missing it, rather than guessing from the feed side alone.

Could my hosting provider be the cause?

Yes — some hosts apply aggressive server-level caching that isn’t visible in your CMS’s own caching settings; if plugin-level cache exclusions don’t fix it, ask your host specifically about caching rules for your feed URL.

How often should I expect a healthy feed to actually update?

Immediately, at the moment you publish — the feed itself should always reflect your latest content the instant you hit publish; any delay after that point comes from caching or from how often a downstream tool checks it, not from the feed generation itself.

Why does PostRSS skip a post that is clearly in my feed?

Check the source’s start date, keyword filters and posting windows first. Items older than the start date are skipped, excluded keywords hold items back, and posts found outside a posting window wait for the next allowed time.

The Bottom Line

A stalled RSS feed is almost always caching, an unnoticed site change, or a downstream tool’s check interval — rarely the feed format itself. Working through the feed URL directly, caching, polling interval, recent changes, and validation in that order finds the actual cause quickly instead of guessing.