Boiler / Central Heating Potential Issue?

[timmyp30]

As we're in the middle of 'summer,' my central heating is currently switched off on the boiler (Ideal Isar Combi).

I've noticed that when the hot water is on/being used (I usually have it on for a couple of hours a day) some of my radiators are still heating up.

I don't recall this happening previously, but unsure if there is a problem? I've turned off all of my radiators on the TRV, so the radiators are no longer heating up (except for, what I assume, is our bypass radiator in the hallway - this rad has no TRV).

Anyone have any idea if this is normal? I'm wondering if there is a stuck valve somewhere?

Thanks in advance.

 

[Doughnut007]

There is a valve I believe called a diverter valve in the boiler. Its stuck of failed possibly.

 

[Steampunk]

Yes, failed diverter valve. Had one a few years ago on my old system, and this was the exact same symptom.

 

[GeForce]

Yours may have a manual position switch, if it does you can manually put it into the DHW position to verify that it's the problem.