Hi I'm Mat from eSpares.
In this video I will be showing you how to diagnose electrical problems in pressure washers.
Pressure washers can be found in many households but can suffer from common problems.
If your pressure washer is dead, trips the fuse board or electrics in your home or stalls
this video will help you diagnose that problem and therefore repair it.
Safety first: Always unplug an appliance before carrying out any work.
Pressure washers can also be subject to pump problems
you can see me diagnose and repair those problems in other eSpares videos.
I will be testing several electrical items within the pressure washer
for that I'll be needing a multimeter.
So if your pressure washer does not start the first thing to check is the fuse.
The reading you're looking for is the same as connecting the two probes of the multimeter together,
as you can see this fuse is fine.
Next thing I need to do is to
access the electrical items inside the pressure washer
I need to remove the two halfs of the case by undoing the screws that hold it together.
With the screws removed I can now separate the two halves of the case and release
this pipe here for ease of access.
And here we see the motor assembly I remove that from the case.
And now I need to separate the two halves of the motor assembly case
just use a a screwdriver to help remove these clips.
And then same on the other side.
The first thing I'm going to check is the whole of the circuit
so Im going to put one probe on the neutral of the plug and one on the live
Obviously the reading has not changed on the multimeter
So there's a break somewhere in this circuit.
So now I'm going to check from the plug up to the switch through the cable
so keep one probe on the neutral of the plug to the neutral wire on the switch
There we can see the reading is very low resistance so we have continuity.
Now going to check the same with the live
so one probe on the live on the plug to the live on the switch
again very low resistance no problems there.
So now I am going to check from the switch to the motor
so one probe on the live on the switch to the live on the Motor
again low readings so no problems from the switch to the motor
and lets do the same with the neutral.
Very low resistance so let's check now across the motor
Ah there you can see a very high reading so there is a problem with the motor.
Some motors like the one on this K5 compact will feature a capacitor.
If you turn your pressure washer on and the motor stops or makes a loud buzzing noise
or it buzzes continuously suspect and examine the capacitor.
You may notice bulges on the capacitor or burn marks and blackening on it.
If the pressure washer trip the fuse board or blows the electrics in your home
make sure there's no water in the switch or the other electrical items
and again examine the capacitor if your model carries one.
It's also a good idea to measure the resistance
across the plug so put one probe of your multimeter on the live pin and one on the neutral
and you're looking for reading of between five and twelve ohms.
So there we have it.
Diagnosing common electrical problems on a pressure washer.
Spares and accessories for pressure washers as well as all other household appliances
can be found on the eSpares website.
Thanks for watching.