Hi I'm Josh from espares.
And in this video I'll be helping you to diagnose control
and program problems in your tumble dryer. Now tumble dryers come
in two types: vented and condenser
vented dryers tend to be a simpler design
primarily just using an element and a motor
and the timer on a vented dryer is similar to a simple time switch
found on quite simple micro waves. Condenser dryers on the other hand
tend to be a slightly more a complicated design.
As the name suggests they use a condenser
to extract the moisture from the moist air
as it passes over it before then
putting the air back into the wash load to help dry.
Now the first fault we're going have a look at
is if your dryer is blowing a fuse as soon as is it switched on.
In most cases this is caused by the presence
of a short circuit and it's most likely that the short will exist
in the heating element although it can occasionally crop up
elsewhere. On this particular
dryer although the and heater is located
on the back the connections to it
are actually inside the dryer so to get to them
I first need to remove the top of the dryer and then remove
the side panel.
Okay so now I've got the
top and the side panel off and i'll just just turn it round.
Now the connections to
the heater are here so if I just
pull this plug out and
I'm going grab a multi meter and placed it onto a
low resistance setting and just
place the probes of the meter onto the two terminals
inside the plug to the heater.
For a working heater I'm looking for reading of between twenty
and fifty ohms, here I'm getting about 25 - 26 ohms that shows that the element
should be okay.
Now it can sometimes be the case that you do that test when
and fuses is blowing and the reading you get on the meter would show that the
element
is still working of course if it's blowing fuses than
you know that's not the case now that can be caused by the presence
of a short to earth perhaps caused by
a bra wire coming into contact with the element. Now
the way he test that is to just place one of the probes
onto one of the terminals in the plug and place the
other probe onto the metalwork
of the appliance. Now if there is any short circuit going to earth
you will get a reading on the meter but here I'm not getting any sort of reading
so that shows that there isn't a short present.
If your dryer is causing
the electrics to trip that can be caused by a
leakage of current to earth.
The way to test that is quite similar it can show up
just by placing you meter onto a highly resistant setting
and then place again
one of the probes onto one of the terminals
inside the plug and place the other probe onto the metal work.
Now if there is any sort of leakage again
you should get some sort of reading on the meter in this case I'm not getting
any reading so that
shows that circuit is complete and there isn't any leakage
or short present. Now another cause
of a blowing fuse is a faulty mains filter
a mains filter is fitted in most
tumble dryers and it's designed to stop interference
from getting into the circuit. You can test the mains filter
for the presence of a short circuit just grab your meter
and place it on a low resistance setting. And trace
the wires back from the filter.
In this case they go into this plug here so I'm just going to
place the probes of the meter
onto the terminals inside the plug.
Any short circuit is going to show up is a reading at less than three or
four ohms.
In this case I'm not getting the reading but if you are getting
reading a short circuit disconnect the filter
and check again and if that's removed the short-circuit
and obviously the fault lay in the filter
on the other hand if disconnecting the filter doesn't get rid of the
short-circuit
try disconnecting the motor and the
element and testing again for a short.
If the short has gone
and that would indicate that it lay probably
in the motor as we've already tested the element. On the other hand
if removing the motor and the element doesn't get rid of the short-circuit
and its most likely to be in the control board
and you need to replace it.
If you do have any sort of faults related to the control board
in the dryer it can be quite difficult to actually prove the presence
of the fault. The control board is responsible
and for turning on and off all the different circuits in the dryer such as
the
heating circuits, the motor circuit.
If you're condenser dryer and has a pump which pumps water
from down at the bottom up into the reservoir at the top it will also have a
pump circuit.
If you are experiencing a problem
with any of those areas in your dryer it's much better to test the individual
circuit
first before suspecting that the problem lies
with the control board. Obviously
once you've tested the circuit and you haven't found the presence of a fault
and its most likely the fault will be in the control board itself
and you need to replace it. Now if you need help diagnosing any other faults in
your
tumble dryer check out my other espares videos. Spares for tumble dryers
along with other appliances are available on the eSpares website.
Thanks for watching.