Strom Electric Boiler no hot water

[dilalio]

So engineer now thinks the temp sensor is fault

Strom engineer?
Either way he should be able to test that as it'll most likely be an NTC with resistance table to look up.

 

[Sonic70]

Local gas Safe engineer. He couldn't test it today because Strom office closed at 4.30 and he didn't arrive till after that so couldn't get the resistance look up table.

 

[dilalio]

Local gas Safe engineer. He couldn't test it today because Strom office closed at 4.30 and he didn't arrive till after that so couldn't get the resistance look up table.

Probably be 10kΩ

 

[dilalio]

Probably be 10kΩ

Warm it up measure resistance.
Let it cool then measure again, resistance should go up.

At 25°c see if it measures 10kΩ

 

[Sonic70]

Thanks for that info.

 

[dilalio]

Thanks for that info.

You're welcome.
HIHs.

 

[troy66]

E7 on a Strom boiler usually points to a domestic hot water sensor fault or related wiring issue. Since heating works fine, the hot water circuit isn’t being detected properly. I’d check the flow sensor connections and possibly replace the sensor. Sometimes a reset clears it, but if persistent, a qualified engineer should inspect.

 

[Sonic70]

Info from Strom is that the hot water temp sensor throws up this fault. Should be able to check the operation of the flow sensor with a multimeter across the terminals as well.