[johnmar]

Re: Ancient Bosch 0730301528

Martin wrote:
Oh dear! We’re not using salt in the water softener unit then are we?

Obviusly not often enough 😳

We are in a VERY hard-water-area. Most of the water is softened apart from the dishwasher which shares its supply with the drinking water which is of course unsoftened.

I need to keep a better eye on this 8)

Regards
John

[johnmar]

Re: Ancient Bosch 0730301528

Thanks Martin

I was trying to factor-in some actual repair and parts costs in addition to an ‘assessment-cost’ which is why my figure was looking high. It’s useful to know though, that the required level of professional help is available at affordable prices.

A DEVELOPMENT :rolls: Would you believe it? As an experienced engineer probably yes, the machine seems to have righted itself!! We tried it out on a different programme (50 C normal ), which was OK and then 50 C economy, which was the problem programme, also OK!

For the moment we’ll carry on and hope it continues to be OK.

Strangely enough, in the strainer filter there were many pieces of tubular-shaped limescale (never seen this before) which must have come from the heating element.

Anyway thanks again for your help.

Regards

John

[johnmar]

Re: Ancient Bosch 0730301528

Martin

If I’ve understood you correctly, you’re considering the possibility that a thermostat fault is allowing the system to overheat, BUT NOT sufficiently to trigger a complete shut-down. Also, that as a consequence, there is a temporary mechanical ‘breakdown’ in the timer-drive-train e.g. distortion due to heat, preventing the program from progressing.

At present I’ve yet to start physicaly investigating and have only looked at ‘exploded-drawings’ online. Also I can see that there ae several thermostats (tempreature-regulators) to consider. To investgate this competently and safely, I can see that I would probably require professional help. As a GUESS, I can see that it would not be difficult to spend approx £200, if the problem stopped there. Clearly this needs to be balanced against the cost of buying a new machine.

Am I exagerating?

Thanks again for your thoughts

Regards

John

[johnmar]

Re: Ancient Bosch 0730301528

Martin
Thank you so much for your rapid reply, much appreciated 😀

If I can add some more data..

Martin wrote:
Possibly the thermostat is overheating and the safety stat is cutting in? Which would explain your having to wait for it to cool down? New set of stats required there maybe?

If the safety stat was cutting in, would the machine still carry on with the washing cycle? At present it gets to a stage, YES it does heat up, but then sticks in that position until switched off.

Martin wrote:
Possibly the water level control is crudded up and needs a good flush out and hoses replaced?

I get the impression that the only reason there is water left in the machine is that it isn’t able to complete its cycle and get to the stage where it rinses and pumps out. If I change the setting to Rinse Only, after waiting (possibly for a cool down), then the system rapidly ‘clicks’ through the remaining programs, the indicator moves across and then clicks back to re-set and in the course of that pumps out.
Would what I have described require the drive cog to be engaged?

Martin wrote:Possibly the timer drive motor (073603) drive cog has slipped and not engaging with the timer gearbox?

My initial thoughts (purely speculating) was that it was a ‘drive-problem’ which would tie in with your suggestion of the cog not engaging with the timer. Could this happen on an intermitent basis?
I have just got my wife to run a Rinse Only program (cold water) to see if it completed, which it did. Possibly that points to a heat related problem ❓
Being an intermitent problem, could the timer drive motor itself be at fault, possibly heat related?

It’s good to learn that the timer doesn’t seem to be the problem 🙂

Your further thoughts would be most welcome.

This site and forum is a very valuable resource, particularly for accounants like me who would have been far happier being involved in things mechanical and electrical.

Thanks again

John

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