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Anyone else awash with Bosch d/w heater (box type) failures? Completed 4 this week and 3 more on order including a failure of one I changed just after xmas. all on FD 80– onwards.
Re: Bosch d/w heater failures
Is this the one that develops a fault on the PCB and won’t heat?
Done loads of those by repairing the dry joint that develops where the heater relay solders on to the PCB (Bosch/BSH fit a whole new board, but this repair saves the customer well over 80 quid)
Mike
Re: Bosch d/w heater failures
Sorry Mike, I think Eastlemark means the heater box itself not the pcb fault 😉 .
Only ever had a couple of the boxes go, but they have both been in the last couple of months.
Tony C
Re: Bosch d/w heater failures
eastlmark
Changed about 5 in 8 years under warranty. Ranging from open circuit to a hole in one 😯 and recently a couple (not the heaters fault) dribbling from ‘O’ ring from sump base to heater mount onto mechanical diverter, killing that motor and blowing PCB aswell.Regards
Greg
Re: Bosch d/w heater failures
yep, i mean the heater itself as the newer pcb’s dont suffer the dry joint problem 😥 . They have all been open circuit failures. the worse thing is that there are at least 3 different types and are pricey too so keeping a van stock is expensive.
they have been:266196 £45.13
266197 £45.13
and today,483058 at £62.00
yet the original version of these machines, now 6-8 years or so old hardly ever suffered a heater failure. reckon they are made of the same stuff as the fan elements.Re: Bosch d/w heater failures
Possibly linked to the new style water level control system, Mark. Can it underfill as well as over?
Chris.
Re: Bosch d/w heater failures
Penguin45 wrote:Possibly linked to the new style water level control system, Mark. Can it underfill as well as over?
I don’t think so Chris, as they only operate on water flow control directly from within the heater box, no flow, no heat 😉
I think Mark will find that only certain date codes suffer and that overall, as Greg states, only rarely do they fail, and it has nothing to do with module/relay problems either ❗
In my experience, for what it’s worth, instanteneous water heaters fail as a result of rare ‘hot spots’ within the ceramic windings overheating and blowing. To prove my point and next time you need to change an element, just look closely at the terminal ends? I think you will find that in most, if not all cases, the plastic moulding around the earth clamp has melted somewhat? 😉
Re: Bosch d/w heater failures
Penguin45 wrote:Possibly linked to the new style water level control system, Mark. Can it underfill as well as over?
Chris.
No, these are all still the float in the side type rather than the quriky software/reed float types.
Re: Bosch d/w heater failures
I can remember thinking “easy to change the heater” as i looked with the side off 😆 Only 3 in the last 6 months, none before.
Graeme
Re: Bosch d/w heater failures
I have changed two of these recently. One Bosch and one Hotpoint. Both were connected tolow pressure hot fill!
Any significance?
Bob
Re: Bosch d/w heater failures
I have fitted many of these heaters over the last twelve months, for the last three months i have quizzed the customers and find that all have regually used or always use 3 or 4 in one tablets with no salt in water softener.
I personally think this is more likely to be the reason for failure.
Interestingly I have never had to replace an element that I have previously replaced where the customer is now using seperate detergent – salt – rince aid.
Regards
Sparkey
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