Liberty Ascent II Problems And Troubleshooting Tips That WORK!

If your Liberty Ascent II is alarming, not pumping, cycling by itself, or backing water into the shower, the problem is often easier to narrow down than it first appears.

The Ascent II has built-in LEDs, an alarm, a manual-run button, and a serviceable macerator design. Most problems point to power, venting, a blockage, the check valve, incoming water flow, or a leaking toilet tank.

Here are the most common issues and what they usually mean.

Liberty Ascent II Problems At A Glance

Let’s talk about these problems in detail:

1. Liberty Ascent II Alarm Keeps Going Off

A blinking red alarm means the unit is not evacuating water from the holding tank properly.

That can happen because of:

• A blocked discharge line
• A clogged volute inlet
• A damaged impeller
• A stuck check valve
• An internal hose problem
• An air lock
• Incoming water entering faster than the pump can remove it

The first things to check are simple:

• Make sure the unit has power.
• Make sure the green power LED is steady.
• Stop running water into the system.
• Check whether the discharge piping appears blocked.

The Ascent II also has a PUSH to Silence button, but silencing the alarm does not fix the problem.

If the red alarm remains active, stop using the connected fixtures until the cause has been corrected.

2. Green Light Is Blinking and the Pump Will Not Run

A blinking green power light is not a normal operating condition.

It usually means the safety switch is not engaged.

The Ascent II has decorative covers that must be installed and fully seated before the pump will operate. A magnet beneath the cover activates the safety switch.

Check that:

• Both covers are fitted correctly.
• The magnet is still present.
• Nothing is preventing the cover from seating completely.

A steady green LED indicates the safety switch is engaged and the unit is ready to operate.

If the covers are correctly installed and the green LED still flashes, the safety switch itself may require professional service.

3. Liberty Ascent II Has No Power

If none of the LEDs illuminate and the pump will not start, check the electrical supply before assuming the macerator has failed.

The manufacturer recommends checking:

• The power plug
• Circuit breaker
• GFCI receptacle
• Fuse
• Power interruption

The Ascent II should be connected to a properly grounded GFCI-protected outlet.

Do not use an extension cord.

If the pump recently ran under heavy load, its internal thermal protection may also have activated. The thermal overload can take approximately 20 minutes to reset.

Also Read: Is Kohler Leap Toilet Worth It?

4. Pump Hums but Does Not Turn

If the toilet flushes but the macerator only hums or fails to turn, the cutter or impeller may be jammed.

Typical causes include foreign objects that should never have been flushed, such as:

• Wipes
• Feminine hygiene products
• Small plastic objects
• Hard debris
• Excessively bulky material

The Ascent II uses Liberty’s RazorCut cutter system, which is designed for normal toilet waste and toilet paper.

It is not intended to process arbitrary solid objects.

If the cutter is jammed, stop using the toilet and connected fixtures.

Internal macerator work involves electrical and mechanical hazards. Liberty states that field disassembly outside an authorized service center can void the warranty, so internal repairs are best handled according to the service manual or by an authorized technician.

5. Pump Keeps Turning On by Itself

An Ascent II that starts periodically when nobody has flushed the toilet does not automatically have an electronic-control problem.

One of the manufacturer’s first troubleshooting steps is to check for water leaking from the toilet reservoir.

A worn flush valve can slowly allow water to enter the bowl and then the macerator tank.

Once the water level reaches the pump’s activation level, the Ascent II runs.

Common symptoms include:

• Pump cycles every few minutes
• Toilet appears quiet but tank water level changes
• No sink or shower is being used
• Pump operates normally when it does start

Check the toilet tank flush valve and fill components.

A failing macerator check valve can also cause unexplained pulsing because discharged water can move back toward the unit.

6. Shower Water Backs Up

If water begins backing up into the shower tray, the macerator itself may not be the primary problem.

The manufacturer’s troubleshooting guide identifies two common causes:

Poor Drain Slope or Blockage

Water from the shower must flow by gravity into the macerator.

The connecting pipe typically needs about a 1/4-inch drop per foot.

A pipe with insufficient slope can drain slowly enough for water to accumulate in the shower.

Auxiliary Inlet Problem

The inlet flappers can also become restricted by buildup inside the holding tank.

The Ascent II is designed for additional fixtures such as sinks, showers, and tubs, but those drains still need correct pitch and venting.

If the shower has always drained slowly, inspect the installation before assuming the pump has failed.

Also Read: Is American Standard Rumson Toilet Worth It?

7. Pump Runs, Stops, Then Restarts Much Later

This pattern can indicate that the macerator is cycling on thermal overload.

A typical symptom is:

• Pump begins running normally.
• It fails to evacuate the tank.
• Motor stops after several minutes.
• Alarm sounds.
• Pump starts again after cooling.

Possible causes include:

• Damaged impeller
• Check valve stuck closed
• Closed discharge ball valve
• Damaged internal hose
• Blocked volute inlet
• Air lock

A motor repeatedly going into thermal protection should not be treated as normal operation.

Stop using the connected fixtures until the restriction or pump problem has been identified.

8. Toilet Flushes but Drains Slowly

If the bowl flushes but empties slowly, the problem may occur before waste even reaches the pump.

Possible causes include:

• Toilet discharge blockage
• Blocked extension piping
• Poor venting
• Debris in the strainer basket
• Low water level in the toilet tank

Proper venting is particularly important.

The Ascent II needs an open vent path so incoming wastewater can displace air inside the tank.

The manufacturer specifically warns against relying on a quick vent for this function.

If the toilet has gradually become slower, check venting and drain restrictions rather than simply increasing the flush-water level.

9. Liberty Ascent II Is Making a Loud Rattling Noise

The Ascent II is not silent, but rattling or violent mechanical noise is not normal.

Two common causes are:

Loose Plumbing

The discharge and vent pipes can vibrate while the pump is operating.

Proper pipe clamps help prevent that movement.

Foreign Material

A solid object larger than about 1/2 inch can become trapped in the cutting basket and produce a rattling noise.

If the sound suddenly appeared after something unusual may have been flushed, stop operating the system until the obstruction is checked.

Do not repeatedly run the pump hoping the cutter will eventually destroy a hard object.

Also Read: Is Kohler Leeward Toilet Worth It?

10. Alarm Sounds When the Shower or Bathtub Is Running

If the alarm appears mainly during showers or while a bathtub is draining, the incoming flow may be greater than the macerator can handle under the current installation conditions.

The Ascent II can accept wastewater from additional bathroom fixtures, but flow rate, pipe slope, and pumping head all matter.

Liberty’s current instructions say the unit can handle up to two shower heads and advises avoiding three or more.

For bathtubs, a high drainage rate can also overwhelm the macerator temporarily.

The solution is not necessarily a larger toilet flush or a new control switch. The plumbing layout and inflow rate need to match the system’s pumping capacity.

Well, enough with the problems, let’s get ahead with the solutions now. Luckily, there are solutions that you can try out yourself without any help from professionals whatsoever.

Solutions To Problems In Liberty Ascent II

Here are the solutions that you can try to fix any issues with your Liberty Ascent II.

• Fixing The Clogs And Blockages

Whether it’s the blockage in the macerator or the blockage in the waste pipe, you can clear it out by yourself.

When your macerator pumps are clogged, you simply need to turn the power off first. Then, open up the pump to check up on the macerator unit.

A clog should be visible, and if you see stuff clogging up the blade, you can easily remove them using a thin-nosed plier.

Now, if you are experiencing a clog in the waste pipe, you can also clear it out. To clear up that clog, you simply need thin-nosed pliers for removing the lids of your toilet unit.

Then, clear any blockage you see in the return valve of the unit. Remember, sometimes, the valve can be wholly faulty, and you may need to opt for replacement.

• Fixing Violent Vibrations

Usually, the reason for violent vibrations coming from your liberty ascent II is something getting tangled on the blades of the macerator.

So, to fix that issue, all you have to do is remove any foreign material that may be tangling on the blades of the macerator.

While you do that, make sure to turn off the pump’s power first. Don’t even try to open the macerator lid without turning off the power.

To remove any foreign object, you can use a pair of thin-nosed pliers.

• Fixing The Toilet System Alarm Issue

Well, the reason for the alarm to go off on your toilet system is either your pump is failing to evacuate the tank, or the water flow is too much for the tank to bear.

Solving either of these issues should fix the alarm from going off as well. If you are getting the alarm because of failure to evacuate the tank, you simply have to fix this problem.

This happens when there is a blockage in the drain, or the impeller gets damaged. So, fixing this means you have to either clear up the drain blockage or you will need to replace the impeller and get a new one.

As for solving the water flow issue, you can simply control it from the water supply. Make sure the water flow isn’t too high for the macerator to cope up with it.

• Fixing No Power Issues

Typically, the only reason for having this issue is when something is wrong with your electrical power source. So, here all you have to do is check up on the electrical power source.

If that is working properly, then some part of the macerator may have gotten damaged somehow.

In that case, you have to opt for professional help to repair the macerator. It’s more of an electrical problem rather than problems with your toilet.

• Fixing The Pump Automatically Starts An Issue

If you are facing this issue because of a misfiring micro switch, then the best solution is to replace the microswitch. Doing this will help the pump to reset and fix the issue of automatic start.

But if you are facing the issue because of a damaged rubber membrane, then it’s better to opt for professional help. A technician can help fit a new rubber membrane and switch in the toilet system.

Preventing Problems With Liberty Ascent II Toilets

While issues inevitably occur after years of use, you can maximize the lifespan of your Ascent II toilet by following these preventative maintenance tips:

• Avoid Unflushables – Never flush wipes, paper towels, dental floss, feminine products or other fibrous waste. These clog the macerator.
• Clean Sensor Eye – Wipe down the sensor window regularly to prevent inaccurate flushing.
• Check Fittings – Visually inspect all fittings and connections yearly for leaks or corrosion. Reseal as needed.
• Listen During Flush – Any odd noises can indicate worn parts needing repair or replacement.
• Keep Vent Clear – Inspect vent lines and openings for any debris or nests that could block air flow.
• Pump Seanually – Add RV antifreeze to macerator chamber periodically to lubricate internal parts.
• Watch Water Bills – High usage may indicate undiscovered leaks needing attention.

With diligent preventative care, your Ascent II can operate for over a decade without issue. But if problems do arise, address them promptly to avoid larger failures.

Also Read: Is Kohler Highline Toilet Worth It?

Frequently Asked Questions (FAQ)

Here are some common questions homeowners have about issues with the Ascent II macerating toilet:

Conclusion

To sum up, there are many Liberty Ascent II problems that you may have to deal with when you choose the system. But still, it’s a great system to go for even with all of the issues.

And as you saw above, there are plenty of solutions to these problems to try out as well. So, you won’t have to worry too much about anything with this toilet system setup.