Can a faulty flow meter throw an E18 fault? Trying to fix an intermittent fault that only occurs when the heat exchanger refills mid or late-cycle after the wash cycle commences.
Hi Jonathan Thank you for your message. E18 - check to ensure that the tap filters are clean, if there is any pressure reducing device between the tap and inlet solenoid, please remove this as sometimes the piston inside the pressure reducer can jam shut. Finally replace the heat exchanger inlet valve. The heat exchanger valve can be tested by slightly undoing the valve, and drain the water from the heat exchanger to the wash chamber, essentially opening the valve manually (with power off) Then reinstall the valve and power on, start a cycle. Sequence of operation. Drain pump will run Wash pump runs and test motor current Main inlet solenoid pulsed to check flow meter/water inlet. Once this sequence is done it will want to fill the heat exchanger. Now observe valve operation for noise and excess heat. If it throws E18 during the fill stage ,replace the valve
@@theoracle6005 Thanks so much for the advice! I will check that out. The weird thing with this fault is it never happens until the second or third time the H.E. fills mid-cycle - if you start a cycle you can hear the H E. drain into the dishwasher OK and then hear it being refilled a while later no fault. It's almost as if it occurs once the temperature in the dishwasher has risen. Thanks again!
@@theoracle6005I have a similar model but once it has tested the inlet (and the impeller with reed switch spins) the machine doesn’t then go on. To fill. It seems to think it’s ready to wash as the circulator pump runs. If I add water to the unit manually, it washes. But doesn’t heat. Any clues? It was in storage for a few years and now it is not working. It’d be a shame to throw it. Thanks for any help mate.
@@colmscannell2448Sorry can't help with the part number but if you've basic soldering skills just replace the Reed switch on the flow sensor board - it's a generic part and only a couple of bucks from anywhere like Jaycar. Just take a photo of the original and orient the replacement the same way, noting that it is a very thin glass envelope and will crack if you try bending the leads.
Hi The flowmeter generates a pulse train when the reed switch opens and closes as the magnet spins Generally it would be hard to measure without special equipment such as a scope or frequency meter. So a replacement is generally the way to go and they are only $35 to $40Aud.
A multimeter will not really tell you much unless it's got frequency measurement. The paddle wheel has magnets and opens and closes the reed switch. The dishwasher has a self diagnostic when it begins to fill before each cycle. It Pulses the inlet valve and then checks for flow meter measurement. The machine measures no. of Pulses for the specified test period. If this falls within the specified range then the machine will then begin to fill from the water stored in the heat exchanger condenser tank. If there is no water in the tank, then it will begin to switch the main water inlet valve and count the specified Pulses for approximately 4L of water.
Going to give this a try shortly...if this works, you helped me save over $1000 buying a new one lol
How did you go with fixing your dishwasher
@@theoracle6005 your guide in how to get it open was great. But I needed a new part, so just a new one for $1000 lol
You should do this video again and actually record what you are talking about - but thanks
Can a faulty flow meter throw an E18 fault? Trying to fix an intermittent fault that only occurs when the heat exchanger refills mid or late-cycle after the wash cycle commences.
Hi Jonathan
Thank you for your message.
E18 - check to ensure that the tap filters are clean, if there is any pressure reducing device between the tap and inlet solenoid, please remove this as sometimes the piston inside the pressure reducer can jam shut.
Finally replace the heat exchanger inlet valve.
The heat exchanger valve can be tested by slightly undoing the valve, and drain the water from the heat exchanger to the wash chamber, essentially opening the valve manually (with power off)
Then reinstall the valve and power on, start a cycle.
Sequence of operation.
Drain pump will run
Wash pump runs and test motor current
Main inlet solenoid pulsed to check flow meter/water inlet.
Once this sequence is done it will want to fill the heat exchanger.
Now observe valve operation for noise and excess heat.
If it throws E18 during the fill stage ,replace the valve
@@theoracle6005 Thanks so much for the advice! I will check that out.
The weird thing with this fault is it never happens until the second or third time the H.E. fills mid-cycle - if you start a cycle you can hear the H E. drain into the dishwasher OK and then hear it being refilled a while later no fault. It's almost as if it occurs once the temperature in the dishwasher has risen. Thanks again!
@@theoracle6005I have a similar model but once it has tested the inlet (and the impeller with reed switch spins) the machine doesn’t then go on. To fill. It seems to think it’s ready to wash as the circulator pump runs. If I add water to the unit manually, it washes. But doesn’t heat. Any clues? It was in storage for a few years and now it is not working. It’d be a shame to throw it. Thanks for any help mate.
Hi just wondering whats the part number
@@colmscannell2448Sorry can't help with the part number but if you've basic soldering skills just replace the Reed switch on the flow sensor board - it's a generic part and only a couple of bucks from anywhere like Jaycar.
Just take a photo of the original and orient the replacement the same way, noting that it is a very thin glass envelope and will crack if you try bending the leads.
How do i test with multimeter and what values can i expect if its working
Hi
The flowmeter generates a pulse train when the reed switch opens and closes as the magnet spins
Generally it would be hard to measure without special equipment such as a scope or frequency meter.
So a replacement is generally the way to go and they are only $35 to $40Aud.
A multimeter will not really tell you much unless it's got frequency measurement. The paddle wheel has magnets and opens and closes the reed switch.
The dishwasher has a self diagnostic when it begins to fill before each cycle.
It Pulses the inlet valve and then checks for flow meter measurement. The machine measures no. of Pulses for the specified test period.
If this falls within the specified range then the machine will then begin to fill from the water stored in the heat exchanger condenser tank.
If there is no water in the tank, then it will begin to switch the main water inlet valve and count the specified Pulses for approximately 4L of water.
I replaced it a few weeks ago and the error came back is there something eles iam missing thanks for the vedio
Colm can make sure that the reed switch board is properly seated. If the board comes away then it may cause the error to reoccur.
Did u press the board back into the slot. If it disengages at the small tabs , the flowmeter won't work properly and will alarm