Boiler repair query, ideal isar?

[michael73]

On an Ideal Isar, when the central heating is on, if the boiler displays "d" meaning there is a demand for hot water (when theres not, no dripping hot water taps either) , does it mean the diverter valve needs replacing?
The boiler is three years old and intermittently heats the hot water. Thanks in advance!!

 

[cross thread]

could be a d/valve problem,when the d is flashing do the rads warm up.indicating the valve is passing .this will stop the domestic water getting to its "satisfied" setting

 

[michael73]

Thanks Gordon. I attended a call out. The customer had the heating on and it was working fine, all rads hot. The boiler display had the "d" showing. There was no demand for dhw tho. What do you think? I thought there may a be a leaking tap making the "d" come on and then maybe the valve stuck in mid position? Not sure if thats possible.

 

[michael73]

Thanks Gordon. I attended a call out. The customer had the heating on and it was working fine, all rads hot. The boiler display had the "d" showing. There was no demand for dhw tho. What do you think? I thought there may a be a leaking tap making the "d" come on and then maybe the valve stuck in mid position? Not sure if thats possible.

 

[michael73]

Thanks Gordon. I attended a call out. The customer had the heating on and it was working fine, all rads hot. The boiler display had the "d" showing. There was no demand for dhw tho. What do you think? I thought there may a be a leaking tap making the "d" come on and then maybe the valve stuck in mid position? Not sure if thats possible.

 

[michael73]

Sorry about the posts. Bliddy computers!!!

 

[onlyfitidealboilers]

isolate the cold wtr in to the blr this would prove there is no leaks on pipework etc.

 

[Ihavenojob]

hot water thermister may be faulty causing pre heat to stay on.