How to Diagnose Dishwasher Leaking and Heating Problems


Hi I’m Josh from eSpares. And in this video I’ll be helping you to
diagnose leaking and heating problems in your dishwasher.
Let’s start by looking at leaking problems,
now a dishwasher can leak in two ways. Firstly by leaking water out to the
dishwasher and secondly by leaking internally.
If we just take a look at the door seal on the dishwasher. The door seal isn’t actually a
complete seal it’s just a splash seal
designed to deflect any water of the door back into the tray. Now if the dishwasher isn’t on a
level or flat surface or it’s leaning forward
it’s actually going to raise the water level in the tray.
And if it gets any higher the seal here it can actually leak out the front. So make sure the dishwasher is completely level and that’ll help
to avoid any any leakage. Now if your
dishwasher is level and you getting any leakage from the front it could be due to a
problem with the detergent either you’ve used too much
detergent or the wrong type of detergent.
And as a result as a lot of foam has leaked out of the front.
Now if that’s happened obviously use less detergent and you can also run a
cleaner through the system such as the eSpares limescale and detergent remover. And that’ll help to flush any blockages
through and keep the system running properly. If you have had and
any floods or leakages as a result of the detergent and you’ve checked that
the water level in the tray is at the correct level.
It’s a good idea to run the clean through anyway just to make sure that the system
is completely clear. And you should also be cleaning a
dishwasher with a proper cleaner on a regular basis anyway just to keep the
system working at its most effective.
Now you can also get leaks as a result of condensation
forming after the dishwasher has finished a
cycle you can get steam coming out at the gap
in the top of the door. And if the dishwasher is underneath a
work surface this steam can condense on the underside of the work surface and
then drip down onto the floor.So if you are finding this
just grab a cloth and give the underside of the work surface a wipe and this should help too avoid the problem.
If you are finding that there’s an excessive amount of condensation forming
on the other hand it might actually be that you need to
replace the door seal inside because it’s letting
too much steam out. And you can see how to do that in another eSpares video. You can also get leaks forming as a
result of damage to both the drain hose or the inlet hose. Obviously if there’s any tears
or damage in the material that’s going to let water out.
Also check the washers on the ends of the inlet hose.
If the rubber has perished in any way they’re obviously not gonna form a
proper seal and that’s gonna let water out. Just replace those parts as
necessary Now covers the main external leaks on a dishwasher.
Now I’m going to put the dishwasher down onto its back and we’ll take a look at internal links are taken the base of the dishwasher.
And the first thing we can see is this anti flood switch here . The base is actually a very shallow to tray
and is designed so that if they’re is any internal leakage.
The water can build up to a low-level in that right.
Now if it does that it will gradually raise this polystyrene float and once It
gets to a certain level it’ll activate the
anti flood switch. Now you know if there is afloat in the
tray because when you first turn your dishwasher on and you make a
combination all lights and beeps. And you may have the pump running
continuously as it tries to drain the water away. You can check if there’s any water in
the base just by tipping the dishwasher slightly to one side and
obviously if any water runs out that would indicate there’s a buildup in the
base. So just get rid of any water and that’ll
brings the float back down and deactivate the switch and you
should be able to use your dishwasher again.
Now to give you one a better look inside the dishwasher I’m just going to remove
the anti flood switch so I can fully removed the base. Okay so now I’ve got the base of we can have a look inside. Now the source of the leakage will
come from anywhere they obviously comes into contact with water so the sump the hoses and the pump. Just have a look for any
holes or damage to the material anywhere obviously if you do you find anything and
you just need to replace the part as necessary.
On the other hand if you can find any holes in any of those parts and you can
see any rust or discoloration and in this sort of area here.
It may be that the seals in the sump are damaged. In which case remove the sump and have
a look at the seals if they are dirty give them a good
clean or replace them altogether and then refit the sump. If you still
can’t find any problems with the seals in the sump the flooding may simply have been caused
by too much foaming. In which case reassemble the dishwasher
pop the float switch and the base back on and try it again. While I’ve got the dishwasher on its back
let’s have a look at heating problems. You usually know if a dishwasher has
a heating problem because it won’t finish a wash cycle.
It’s going to keep washing while it waits for the water to
get up to temperature. But obviously if there’s a heating
problem and it’s never going to do that Now dishwasher have two different
types of heaters. One is this standard element type and this is located usually underneath the tub. The other type of heater
which is the one in this dishwasher has a flow-through heater located here in the base. Now you can test both types for
whether they’re working just using a multimeter on a low resistance setting. So just disconnect the heater and place the probes onto the terminals of the heater. And for a working heater
you looking for reading of around about 30 ohms although it could
be about 5 ohms either way now that’s what I’m
getting about 34 or 35 ohms so that shows that this one
should be okay. Now if your dishwasher uses this type of heater it may also have a
thermostat or thermal cut-out fitted some where near to it usually on the underside of the tub. Now if thats faulty it’s obviously going to
cause a problem and you can test again using your multimeter if the
thermostat is faulty it’ll read as a infinite circuits and give no reading on the
meter. On the other hand if it’s working
is a short circuit so less than a couple of ohms. Obviously if
you’re not getting a short circuit reading many need to replace that
thermostat. If you dishwasher uses this flow
through heater it’ll probably also be fitted with a
thermal sensor some where in the door. Now the thermal
sensors don’t tend to fail and they usually only available as part
of the control board So if you’ve checked all these other a
reasons and you can’t find a fault. The chances are you just need to replace
the control board to resolve the issue.
Now if you need help diagnosing any other faults in your
dishwasher check out our other eSpares videos. And spares for dishwashers
along with other appliances are available on the espares website.
Thanks for watching.

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