Baxi combi 105e instant - DHW light won't go out

[newrick1962]

Boiler switches to DHW when hot tap is opened but when the tap is turned off the DHW light stays on and the boiler won't switch back to CH.

Took the microswitch off (looks in good order) & tested it manually and light goes on & off as expected.

Tried pressing the pin down manually but I don't really detect any movement. I'm guessing I'll have to strip it down & clear any debris stopping the pin going back.

Anyone seen this before?

 

[namsag]

YEP if pin aint retuning then strip and clean and smear with silicone grease ,

 

[45yearsagasman]

It may be a problem not only with the front section, but with the push rods inside the diverting valve.