TL;DR

Most Moog Infinity problems in daily use come down to a few repeat situations: feed is not advancing, the bag is not emptying, air or foam is in the line, tubing is kinked or pinched, the cassette is not fully seated, or the same alarm keeps returning after a restart. This guide starts with those real-world problems first, then adds the less common but important issues that can still interrupt feeding.

The Moog Infinity pump can show different alarm messages, but most day-to-day troubleshooting starts the same way. Instead of beginning with the code or alarm name, it is usually faster to start with what is actually happening: formula is not moving, the bag is still full, bubbles are visible, the line is bent, or the pump keeps alarming after the same basic checks. That symptom-first approach is often easier to use during a real feeding routine.

 

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Quick Symptom Guide

This table is meant to answer the real question first: what is happening right now, what usually causes it, and what should be checked before trying the same restart again.

What Is Happening What Usually Causes It What To Check Right Away What Usually Fixes It Alarm That May Appear
Feed is not advancing Empty bag, trapped air, cassette not seated, or tubing problem Formula level, cassette position, pump door, tubing path Correct the setup issue, then restart only after the cause is cleared NO FOOD, NO FLOW IN, NO FLOW OUT
Bag is not emptying Air in the line, bag position issue, blockage, or foam in formula Bag level, visible bubbles, tubing line, formula appearance Remove air, review bag placement, and inspect the line for obstruction NO FOOD, NO FLOW IN
Pump looks loaded but will not run Cassette is not fully loaded or the door is not fully closed Cassette seating, door closure, receptacle area Unload and reload the set carefully instead of forcing another start LOAD SET
Visible bubbles in the line Incomplete priming or trapped air in the tubing or cassette Tubing segments, cassette area, bag Clear the air before restarting NO FOOD
Formula looks foamy Formula was shaken or mixed too hard Formula in the bag Let the foam settle before pouring or restarting NO FOOD
Line is bent, pinched, or blocked Tubing routing problem or obstruction in the set or tube Full tubing path, connector points, feeding tube area Straighten the line and isolate where the blockage begins NO FLOW IN, NO FLOW OUT
Same alarm keeps coming back The real cause was not corrected or the issue is no longer a simple setup problem Whether the same checks were repeated without a change in the setup Stop repeating the same fix and move to the next troubleshooting step Any recurring alarm

 

Feed Is Not Advancing Or The Bag Is Not Emptying

This is one of the most common real-world problems because it can look different from one routine to another. Sometimes the bag is still full. Sometimes the bag is slowly dropping but not feeding as expected. Sometimes the setup looks fine, but formula still is not moving through the line.

Situation What To Check First What Usually Solves It Why It Keeps Happening
Bag looks full, but feed is not advancing Air in the line, cassette seating, tubing path Clear the air, reload the cassette if needed, then restart The setup can look complete even when air or poor cassette seating is still present
Bag is not emptying the way it should Formula level, bag position, bubbles, visible blockage Correct the bag setup and line issue before trying again Flow is being interrupted before the formula reaches the next section of the set
Pump worked earlier, but now feeding has stopped New kink, new air pocket, bag nearly empty, or shifting during movement Check the line again from bag to connection instead of assuming the earlier setup is still unchanged A line that was clear earlier may no longer be clear after repositioning or transport

In practice, this is why “it was working and then stopped” often turns out to be a line change, air issue, or shift in the setup rather than a sudden device failure.

 

Air Bubbles, Foam, Or An Alarm With A Full Bag

Air problems are easy to underestimate because the setup can still look normal from a distance. A full bag does not rule out air. A connected line does not rule out foam. This is why an alarm with a full bag often needs a closer look at the tubing, cassette area, and formula itself.

What to look for first

  • Visible bubbles in the tubing
  • Air pockets near the cassette area
  • Foam sitting on top of the formula in the bag
  • A full bag with repeated alarms
  • More alarms after backpack or mobile use

If bubbles are visible, the line may not have been fully cleared or air may have re-entered the system. If the formula looks foamy, the issue may be the way the formula was prepared rather than the tubing alone. If the bag is full but the pump still alarms, trapped air in the cassette or line is often a more likely cause than low formula volume.

In real-world use, this section matters because the visible problem is not always “the bag is empty.” Sometimes the real issue is air or foam inside a setup that otherwise looks normal.

 

The Pump Looks Loaded But Still Will Not Run

This issue is usually less about forgetting to load the pump and more about a loading step that did not finish correctly. The cassette may be slightly off, the door may not be fully closed, or the area where the cassette sits may not be allowing the pump to recognize the set correctly.

When the set looks loaded but still will not run

  • Check whether the cassette is fully seated
  • Check whether the pump door is fully closed
  • Check the receptacle area for visible buildup or poor contact
  • Unload and reload the set carefully instead of trying repeated starts
  • Do not keep forcing the same setup if the door or latch looks damaged

This is one of the clearest examples of why slowing down helps. If the set does not load cleanly the first time, another press of the run button usually does not solve the real issue.

 

Tubing Kinks, Pinches, And Flow Blocks

When the line is bent, pinched, or blocked, the most useful question is where the problem begins. A visible kink in the line is different from a connector problem, and both are different from a possible feeding tube blockage.

Flow block checks

  • Look for sharp bends, twists, or pressure points in the visible tubing
  • Check for pinched sections under clothing, bedding, straps, or movement points
  • Check connector points where flow may be interrupted
  • Ask whether the visible set path looks clear even though flow still stops
  • Treat a possible feeding tube blockage as a different problem than a line kink

That location-based check is usually more useful than treating every blockage the same way. A kink in the visible line is one kind of fix. A problem beyond the set is a different one.

 

When Re-Priming Actually Helps

Re-priming is helpful when the problem is really about air or incomplete formula movement. It is less helpful when the issue is still a loading problem, a kink, or a blockage that has not been corrected. That is why repeating the same priming step can sometimes waste time instead of solving the real problem.

Situation Does Re-Priming Usually Help? Why Better Next Step
Visible air remains in the tubing Usually yes The line still needs to be cleared Remove the air, then recheck flow
Formula did not fully advance during setup Sometimes The earlier priming step may not have fully cleared the set Review the line and clear it fully before restarting
Cassette is not seated correctly No Priming does not solve a loading issue Reload and reseat the cassette first
Tubing is kinked or pinched No Flow is still physically blocked Fix the line path first
The same alarm returns without any setup change Usually no The real cause is probably still present Go back to the symptom guide instead of repeating the same prime step

 

When The Problem Keeps Coming Back

At some point, repeated alarms stop being a one-time setup issue and become a pattern. That is usually the point where a symptom-first review helps show whether the same mistake is being repeated or whether the problem has moved beyond a basic home check.

When it keeps happening

  • If the same alarm repeats after the same fix, the real cause was probably not corrected
  • If the pump worked yesterday but now keeps alarming, treat today like a new setup review
  • If air, kinks, and loading have already been ruled out, the problem may no longer be a simple setup issue
  • If the problem continues after careful reloading and line review, stop repeating the same reset cycle

This is usually the point where repeating the same steps becomes less useful than stepping back and reviewing the full setup again from the beginning.

 

Less Common Issues That Still Matter

Some Infinity problems are less common in daily use, but they still matter because they point to a different fix path. These issues usually do not start with the same air, bag, or tubing checks. They often need a more direct response.

Less Common Issue What It Usually Points To What To Check First What To Do Next
ER01 to ER99 code appears The pump failed a self-test instead of showing a normal flow problem Whether turning the pump off and back on clears the code If the code clears, review settings before starting. If it stays, move to support.
Charging is not working The issue may be the outlet, charger, connection, or charging port instead of the feeding setup Wall outlet, charger connection, charger condition, and pump charging connection Check the charging path in order instead of assuming the battery alone is the issue
Cassette area keeps giving the same load problem The receptacle or sensor area may need closer inspection Cassette seating area, visible buildup, or poor sensor contact Inspect and clean the area as directed, then reload the set carefully
Door will not close correctly or looks damaged A damaged door or tab may be interfering with normal loading Visible cracks, broken tab, or closure that does not stay secure Do not keep trying to run the same setup if visible damage is present
Flashing battery or charging indicators continue after basic checks The issue may be beyond the normal charging connection path Whether the charger, outlet, and visible connection points have already been checked Stop repeating the same charging checks and move to the next support step

This section is there so the page covers both the problems people run into most often and the issues that happen less often but still need a clear next step.

 

Error Code Numbers People Search For

Some users search by the exact code number shown on the pump. On Moog Infinity pumps, self-test errors appear as ER followed by a two-digit number. Commonly listed codes in Moog resources include ER01, ER02, ER03, ER04, ER10, ER11, ER12, ER13, ER14, ER15, ER16, ER17, ER30, ER31, ER40, ER50, ER51, ER52, ER60, ER61, ER62, ER63, and ER99.

Code What Is Publicly Confirmed What To Do First
ER01-ER99 The pump detected a self-test error Turn the pump off and back on. If the error clears, review settings before starting. If it stays, move to support.
ER04 Can occur if the pump was stored too hot or too cold Power cycle first, then consider whether storage temperature may be part of the problem
ER10 Can occur if the pump is still wet after cleaning and tubing slips around the rotor Make sure the pump is fully dry before use, then power cycle and reload the set
ER40 Can occur if the on/off button was held too long and the pump reads it like a stuck key Turn the pump off and back on using a normal press, then recheck operation
ER11, ER12, ER13, ER14, ER15, ER16, ER17, ER30, ER31, ER50, ER51, ER52, ER60, ER61, ER62, ER63, ER99 Listed by Moog as Infinity self-test error codes, but not individually explained on these pages Use the same ER self-test path first: power cycle, verify settings if cleared, then move to support if the code remains

 

Final Takeaway

The strongest troubleshooting article for the Infinity pump is symptom-first, but it still needs enough range to cover both the common problems and the less common ones. Start with what is actually happening: feed is not advancing, the bag is not emptying, bubbles are visible, formula is foamy, the pump looks loaded but will not run, or the line is bent or blocked. Then use the less-common section when the problem does not fit the usual air, bag, line, or cassette issues.