Matsui MF2W/A dishwasher stuck cycle

[bobmedia]

The dishwasher starts its cycle. You can hear the water being pump round inside. Open the door, pumping stops as you would expect but water is cold.

I’ve checked the heating element. Not open circuited.

I’ve checked the thermostat. Not open circuit. (Does this machine have a further thermostat(s) that needs to be checked and if so where are these located on the machine?

I don’t want to play ‘change the part bingo’ as money’s too tight and would prefer to indentify the problem and replace the correct part first time.

Grateful for tips, help, or guidance that forum members that may lead me to a resolution of my problem.

Got to go — I have a sink full of plates, pots, and pans to wash.

Look forward to hearing from the forum.

Many thanks

BM

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

I’ve searched far and wide on the internet for a circuit diagram for this MF2W/A without luck. In desperation I’ve changed the timer but it hasn’t correct the problem.

So controller, heating element, and thermostat are ok. So there must be another interlock/sensor that turns the heating circuit on.

But where? what? how? is the sensor.

Any hints or clues about how I can fix my dishwasher?

Thanking you all in anticpation.

[kwatt]

Re: Matsui MF2W/A dishwasher stuck cycle

Matsui is a brand owned by Currys (Dixons Retail) and other than the guys that have perhaps had a third party job from them, there’s no technical information on them in the wild.

Not a lot of help but explains why you can’t find anything.

K.

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

Kwatt,

Thanks for your reply and it does explain my difficulty in finding the information.

I’ve also been to my local Curry’s repair centre. I asked if they could give me a copy of the circuit diagram. Understandably the answer was a polite “no”.

Thinking laterally I wonder if this machine is marketed under a different brand name and hopefully information on that item may be forthcoming.

I’m perplexed that if there isn’t any technical information available how can I call someone out to repair the machine who isn’t associated with Curry’s. Presumably they won’t be able to do so.

Be that as it I’m determined to repair this machine myself (with the help and guidance of forum members — for I’ll be eternally grateful).

Again Kwatt thank you for your contribution.

[kwatt]

Re: Matsui MF2W/A dishwasher stuck cycle

Oh it will be sold as something else, it looks like a Haeir or Midea dishwasher.

The trouble is, what one sold by who?

K.

[madangler1]

Re: Matsui MF2W/A dishwasher stuck cycle

Have you checked those pressure switches. Most older timer based units the heater power goes through the pressure switch to prevent meltdown when no water in.

[repman]

Re: Matsui MF2W/A dishwasher stuck cycle

I seem to remember a d/w it was midea and it had a thermostat and a thermal fuse elsewhere on the base.They both look the same so its best to chase the wiring to find it.

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

Repman and madangler1

Thank you for your input and suggestions.

I’ll take the left hand panel (so far I’ve just taken the RHS panel off) and have a further look.

Together we’ll chase this solution down.

Again thank you for your help.

[repman]

Re: Matsui MF2W/A dishwasher stuck cycle

think you may have to lay the m/c on its back and remove base to see

[Allsorts]

Re: Matsui MF2W/A dishwasher stuck cycle

It could be a simple heater relay problem. Trace the wiring to source.
George

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

repman wrote:think you may have to lay the m/c on its back and remove base to see

Thx Repman for that suggestion. I’ll do the RHS panel first and see how it goes.

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

madangler1 wrote:… check those pressure switches … older timer based units the heater power goes through the pressure switch to prevent meltdown when no water in.

I’ll find out where the pressure switches are and check these.

Thx for the suggestion Madangler1

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

Removed and checked thermostat for continuity.
Effectively a short circuit (around 0.5 Ohm). Same sort of reading as the one on the RHS I checked earlier in the week.

Forum posts suggest other items to check are:

pressure switches — which means I’ll need to remove the RHS panel once more to check.

heater control relay — now need to hunt this down

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

repman wrote:think you may have to lay the m/c on its back and remove base to see

Repman thanks for this suggestion which I’ve followed up on. Putting the machine on its back was much easier than I thought.

As was removing the base pan and discovering the anti-flood cut-out.

Much easier to test the heating element, and the two thermostats from this position.

However didn’t make testing the pressure switches easier. You could acces the terminals well enough but not the pressure switch hoses.

I put the pan back on, put the dishwasher in the upright position, and then remove the RHS panel.

[bobmedia]

Re: Matsui MF2W/A dishwasher stuck cycle

madangler1 wrote:… check those pressure switches … older timer based units the heater power goes through the pressure switch to prevent meltdown when no water in.

I removed the right hand panel.

The pressure switches and hoses are simple access from this position and they unclip easily.

I unclipped the clear plastic tube and connected another one which I then gently blew into to operate the switch action. Checked out ok.

One thing I noticed when I disconnected the plastic tube there was a noticeable rush of air from it.

I reconnected the hoses.

Presumably I need now to empty the sump of water completely of water and then refill so that the pressure switches are pressurised as before.

Is that correct?

What happens if I don’t?

Once again thank you to the forum for its ongonign help and support.

[Author]

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