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Macerator Toilet Problems

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Macerator Toilet Problems

Category : Basement Care , News

Macerator toilets are commonly used in homes across the UK and remove waste when it is flushed from below the drainage line.

Macerator systems are quiet and powerful but there can sometimes be problems. Macerator toilet pumps can fail, block or even break.

We have provided a list below of the potential problems related to macerators and how these can best be dealt with.

Some of these tasks can be carried out by yourself, however, for peace of mind we would always recommend a trained specialist carries out the solutions to your macerator problems.

Macerator Is Still Running And Will Not Turn Off

One common problem that our customers have is that their macerator toilet keeps running even when turned off. This problem is caused when the pump has already flushed and continues to do so even though the macerator is clear. There are a number of reasons why this might occur:

  • Blocked macerator or pump
  • The rubber membrane has become damaged
  • Blockage in waste outside of the outline pipe
  • The microswitch is misfiring

Blocked macerator or pump

To unblock the macerator, a technician will first turn off the power supply. They will then remove the lid of the macerator. The blockage will most likely be toilet paper or other waste that has become stuck in the blade.

To remove this waste the technician will then use pliers and then turn the blade counterclockwise and carefully remove the waste accordingly.

Macerator Toilet that needs cleaning

Macerator Toilet that needs cleaning

If the macerator pump is blocked then the motor will need to be removed from the toilet. It will then need to be turned upside down so the pump impellers are visible.

Just like with the macerator, pliers will be used, and the engineer will clear the waste. The motor will then be put back into the macerator toilet.

Misfiring microswitch

This is a common problem that occurs in macerator toilets and this occurs when the waste is stuck between the switch and tank floor, which tricks the switch to thinking that the tank is full. The engineer will clear all the waste by hand and restart the pump.

The Rubber membrane is damaged

The rubber membrane will become damaged over time due to the water applying pressure on the seal. This will mean that potentially waste can get into the switch. The only real fix is that you will need a new replacement system that can be fitted by a specialist engineer.

Macerator Toilet Is Vibrating and Making A Loud Noise

If the macerator toilet is vibrating and making a loud noise, then it is more than likely that something has got stuck in the blade mechanism of the macerator.

A service engineer can fix this for you by removing the foreign object from the blade manually removing the object and by turning the pliers counterclockwise.

Macerator Pump is Starting on Its Own

If the macerator pump keeps starting by itself, then it is potentially a problem with the microswitch. For problems to occur with the microswitch it has to have either a fault with a misfiring microswitch or the rubber membrane may have become damaged.

If the microswitch is misfiring it leads the macerator into thinking that the tank is full when it is in fact empty. This will need to be replaced and then the pump can reset.

If there is damage to the rubber membrane, then waste will be able to get into the switch and cause problems to the system. A service technician will need to fit a new switch and rubber membrane.

Macerator Toilet Is Continually Tripping the Electrics

Macerator toilet pumps that continually trip the electrics is something that will need to be handled with care. This usually means that the water is getting into it which means the circuit will cut off so it will not lead to further damages. With the obvious dangers of water and electric it is recommended that only a trained technician is given the job of repairing the macerator.

If the motor has become damaged or is faulty then a specialist engineer will need to install a new macerator as the motor will be unrepairable.

The Macerator Does Not Smell Nice

If you have had a macerator operating for a long period of time, then it is more than likely it will need a deep clean. The macerator should ordinarily have instructions on how to clean it.

Macerator Toilet Pump is Foaming From The Vent

If your macerator is foaming out of the air vent then it is due to the over use of toilet cleaner or bleach being used. If this continues for a long period of time, then the motor will stop working because it is overheated this is because the toilet pump cannot pump water out correctly.

The solution would be to replace the microswitch to ensure the toilet pump system works correctly.

Macerator Is Running But It Is Not Pumping Water Out

If the macerator is running but is not pumping the waste away, then it is possible that the waste pipes are frozen. In just the same way that central heating systems pipes can become frozen so can those of the macerator.

The service engineer will first turn off the macerator and if the waste has overflowed then they will remove it. Hot towels will be used to heat up the pipes and loosen up the frozen blockage allowing the macerator to pump out the waste.

Need A Macerator Service?

We hope this article has provided you some useful advice about how a specialist technician will tackle different macerator toilet problems. We have a number of technicians placed across the UK able to help with any of your macerator issues. You can get in touch by calling 0800 019 9949 or by clicking the link down below.



August 21, 2020 at 9:01 am

Please could I have a quote for replacement of a macerated pump


August 24, 2020 at 8:55 am

Hi Carolyn, Thank you for contacting The Basement Sump and Pump Company. If you can send your contact details onto or call 0800 019 9949 and one of our customer services team will be in touch for a possible quote for a replacement of a macerated pump?

Alan davison

September 24, 2020 at 7:53 am

My macerator was working fine then the motor got blocked with someone using wipes and it pop the fuse, i cleaned it replace fuse and it works fine apart from it takes all the water from bottom of toilet, what do you think the problem is please

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Cosford hall classic
Cosford hall classic
11:18 11 Jan 21
Brilliant service from Jason , arrived on time and was very friendly and polite, he serviced our pump whilst explaining... in detail what he was doing and what we should expect from our pump system. Mark has done our service for over a decade and I didn’t think anyone could be as good but Jason has filled the slot perfectly. Here’s to another decade of good service from Jason .read more
Steve Milner
Steve Milner
20:32 09 Dec 20
James from the Basement Sump & Pump Co attended to ensure the basement pump his firm installed last year was working... well. These pumps can draw in sand and dirt so it is important to clean it annually. Pump itself is excellent - definitely recommend this company for the installation of more
Tim Wheeler
Tim Wheeler
15:17 24 Nov 20
Friendly and efficient service and very easy to deal with.
Kausar Hussain
Kausar Hussain
13:52 07 Nov 20
Excellent service. The technician identified the issue with pump and the set up and carried out the modifications to... rectify the issue. Very thorough and professional serviceread more
Lynn Woods
Lynn Woods
09:01 29 Oct 20
Extremely knowledgeable and provided a thorough high quality service.
Bradley Brown
Bradley Brown
17:43 09 Apr 20
lewis barwick
lewis barwick
19:07 06 Jul 18
I called up for a service which was promptly booked in. Mark was friendly and knowledgeable. I will definitely be... having you back next year. Many thanks, more
alan holmes
alan holmes
09:59 28 Jun 18
Mark arrived early, protected floor surfaces and carried out the service with good knowledge of the site from doing the... initial installation and previous service visitsread more
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