How to Fix a Broken Blender and a little Information on Troubleshooting

Blenders are relatively simple gadgets and can narrow down troubleshooting to three main areas; motor, blades or electric power.

This an easy guide to take the steps to fix your blender.

What can go wrong with the motor?

It can suffer burn out!

What can go wrong with the blades?

They can get clogged with debris

What about the electric power?

It can be interrupted

Tools needed

  • Voltmeter or continuity tester or you can use a multitester
  • Screwdriver
  • Wrench or pliers

First Testing for electrical power

  • Switch off at the plug
  • Put the blender switch “on”
  • Set voltmeter to RX1 scale
  • Clip the probes to the two metal prongs that are usually plugged into a power receptacle
  • Watch the meter readings
  • Press all the blender switches in turn
  • A low reading on all switches indicate that it is working as it should
  • Infinity reading meter reading indicates that the blender switch is defective

Secondly Clean the electrical terminals

  • Remove the plastic face-plate that covers the housing and switches
  • This will expose the screws that hold the switch housing
  • Remove the screws
  • A blackened terminal will be a cause for concern
  • Using spray solvent clean the contacts, openings and terminals behind the switch block
  • Connect the power cord and switch it on, if it doesn’t come on then you can try other options

Servicing the motor

  • Remove the base and turn the blender upside down
  • Grip the drive shaft with pliers or wrench
  • Turn the blender sideways to attach the wrench to the drive stud
  • When you rotate the drive stud clockwise one revolution and the blade does not move properly, the drive stud may need tightening
  • The drive stud may also need replacing if the corners are worn, it can be replaced with a new part
  • The motor can be replaced with a new part, depending on availability and cost
  • It can also be serviced
  • It may be a less expensive option to get a new one as the cost of a new blender is very competitive

Testing the fuse

  • First you need to find the fuse (look at the end of a wire coming from the terminal where the power cord is)
  • Set your voltmeter to RX1 and clip its probe ends to the lead wires
  • If the meter reading is too high the fuse needs replacing
  • The size of the fuse is engraved on the fuse
  • Make sure you have the right size fuse

Is it jammed up? Blade shaft problems

  • First try tightening the base and check the gasket
  • The gasket can be replaced
  • Take the drive apart as much as possible
  • Try turning the blade shaft
  • It may be clogged with debris which need to be removed
  • Replace the coupling


  • Test, plug it in, press the various switches
  • If the motor is burnt out it will not work
  • If you have managed to fix it, well done!
  • Replace all the covers and screws

Some troubleshooting ideas

Runs intermittently

  • Check the wiring
  • Check the motor
  • Doesn’t run at some speeds
  • Check the multispeed switch, first clean, if that doesn’t work replace it

Check the wiring

  • Motor runs, but blade not turning
  • Check drive stud, if loose tighten. If damaged replace
  • Check the blade. If dirty, clean and lubricate. If faulty repair or replace.

Jar Leaks

  • Check to see if the base is loose, if so, tighten base into jar
  • Check seal. If damaged, replace seal, blade assembly or jar

As you can see from troubleshooting and guide to fixing there are a few things to check before you bin your blender!

Using some common sense with using your blender will help.  For instance the gaskets are commonly known to harbour bacteria which would imply that they are not always kept clean.  If this is the case then firstly it is not hygienic and secondly it may be causing damage.

Checking the jar periodically will help, make sure it is not leaking liquids, it can be tightened to the base.  Metal drive studs combined with plastic blade-assembly sockets can be a problem to look out for; the assembly socket can be replaced if so.

There are also the more obvious hazards that can cause damage such as over filling the jar, never fill past the maximum level. Make sure you clean your hands to keep the switches clean; that can help any damage getting into the switch housing.

If you like to “make do and mend” and have the ability then this article is for you.

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