Strom Electric Boiler no hot water

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Sonic70

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My nephews Strom boiler has error code E7, so no hot water. The heating side is working Ok. Does anyone on here have any experience of these boilers?
 
That's an overheat code.
Reset thermal cut out.
Check incoming flow rate... Has it dropped?
And is temp set to high on display?
 
Thanks I'm going over to reset the thermal cutouts in a while, the flow rate and temp are ok when I checked them last night.
 
Reset the thermal cutouts and it doesn't seem to be that. We can adjust the flow so that it heats the water but it keeps going upt to 72 degrees whereupon it cuts out. My nephew tonight got it to work with the kitchen tap but it's coming out scalding hot.
 
We've tried adjusting that but just can't get it to work properly. I've now got one of those flow rate cups so we can set it a bit more accurately
 
Sonic70 said:
We've tried adjusting that but just can't get it to work properly. I've now got one of those flow rate cups so we can set it a bit more accurately
Click to expand...

I believe the water companies have reduced incoming mains due to the drought in some areas. In certain premises this could be enough to cause issues such as yours.
 
Sonic70 said:
Reset the thermal cutouts and it doesn't seem to be that. We can adjust the flow so that it heats the water but it keeps going upt to 72 degrees whereupon it cuts out. My nephew tonight got it to work with the kitchen tap but it's coming out scalding hot.
Click to expand...

Can you adjust the set temp on the unit display?
 
I'd have called strom tech.
See if they have a part that needs changing... Must be internal stat of some kind, but being electric I've no idea how it controls temp.
 
He's been on the phone to them, so could be temp sensors, flow sensor, heating element scale build up, main PCB fault, triac board fault, etc. They gave him the number of an engineer in our area.
 
Sonic70 said:
He's been on the phone to them, so could be temp sensors, flow sensor, heating element scale build up, main PCB fault, triac board fault, etc. They gave him the number of an engineer in our area.
Click to expand...

Hard water area?
How old is the product?
Interested because I have a Viessmann electric boiler on my books and it's a PITA!
 
Oh yeah it's a hard water area, the boilers only a few years old, I don't think the previous owner ran it much as he had moved into a barge and was doing it up to sell.
 

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