At the home town house , the electrical water heater doesn't heat up as hot as usual since the heating knob at the middle would be enough but it's still warm or luke warm.
Since , call back home town , elderly doesn't know much about water heater safety neither do i since I am not in electrical field.
Also old 30 years housing doesn't have any dedicated RCCB or RCBO.Just the main DB MCB some kind of SMC brand.

1.The water heater is like over 10 years old with ELCB
2.Not hot even on middle
3.I ask them to take a picture of the MCB but the heater is quite high so i ask for the model and details
4.Possible to repair ? or change a new one ?

This is the National water heater brand , not sure how long was it .Anyone have any idea of this model ?


Right now , what I should to do for advice ? Currently , i am sure they doesn't know any good electrician who are expert in water heater except those random letter box name card.
Please help me with advice on which option in increase the safety on water heater ? I read some of the water heater thread but do not understand since i am deep understanding in electrical.

Dear Expert ceo684 , Momo33 , halcyon27 , Selene Yeo , stormer.lyn
Apologize and hope you all can help me on the urgent matter since I stop them from using the water heater for safety purpose.Beside need also find a new water heater.A cheaper one without pump but safety first by adding extra DB.

This post has been edited by Maxieos: Oct 16 2022, 07:26 AM

-Reserved-
Will ask for brand
The post limited to 5 user tag , hope you guys can give a bit of comment.Zot , FusionXY.

Not missing but busy.

I apologize for not replying.The updates

1.Sunday no technician.So I suggest to increase the heater to 75% hotter ( basic 50% before it get less hot ) and spray into the water tub.I confirm that the water is not hot and I forgot to mention , the water flow is also slow.
2.Monday call 3 technician , all 3 said no need to put extra RCCB outside since all new or old water heater have Elcb build in.All 3 technician said something stuck cause it to get water not hot.
3.Tuesday , Call again to main joven and panasonic technician for repair but need to book the time next week and the cs said go to electrical shop and choose a model
4.Yesterday plan to go out and have a look for the model , heavy rain , didn't go out.
5.Today , see whether still rain or not at the evening. as what Momo33 said , buy water heater first , then only find a good technician.
All technician also didn't recommend to have an extra RCCB , i really don't know why as they said all buid in, no need anything extra.

As some technician told us better change but some said can fix.Most of them doesn't have cert or just normal electrical technician.
I also don't know which decision to choose where the water heater is less hot and water flow very slow.If water flow slowly should be much hotter.
Anyone know what is the reason of part failure when water heater not getting hot ?

Now finding a good water heater but budget not over rm400.
Any suggestion for DH-3MS1 and DH-3N series ?

Thanks , will reply to you all but I don't really understand much on those DB and model and brand.I need to research more into it.SOrry for not updating in time and thank you again

Last week i call to those electrical man , not as details as yours but they did said something was stuck and said can be fix and clean.

1st , I don't think it's because of rainy season , it's more like it's not hot.Example yesterday was fine at 50% tuner knot but today 75% only achieve the same temperature as 50%.It's 25% difference.
It's comparing yesterday and today.Just 1 day the difference it too wide.

I haven't go and check the piping but I am sure the water flow speed is same from yesterday and today and only the changes is the temperature need to set to 75% compare to yesterday 50%.
If the water flow flask is faster , I think need 99% to get 50% temperature.

What could be the reason ?

Update , check the piping , nothing wrong.Very strong the water flow in as usual of long usage , heater likely about 50% of the flow out from the shower head.Maybe due to long usage.
If lower stream flow will get hotter but is cooler just within 1 day ago.

Possible but need to check by those electrical man.Is it safe to ask those electrical store to check ? I don't think they are certified for water heater.
Now using back normally.Just have to turn the knot higher 75% since most of the electrical man said it's safe , just something stuck and water flow really getting slower than before.
Last 2 week still can get 50% flow out but this week only 40% flow.Don't really know what happen.

Should change or should fix ? Still looking for a budget panasonic unit without pump.Not over rm400 + installation.