worcester heatslave-2 way valve problem?

[borney1]

I have a worcester heatslave combi boiler-heating will come on no probs-but when you use the dhw heating then goes cold i have to turn the heating off then back on again to get it to work..I have had a good read on here and taken the cover off the honeywell valve-when heating is turned on the arm on the valve turns to the left then stops in that position-when hot tap is opened or the hot water on the timer is advanced to the on position, valve returns to start position-after a short while boiler then starts up for the heating but valve does not move unless heating turned off then back on again,also the dhw isnt that hot which prob is a seperate problem.
Has anybody come across this prob before?Im guessing it might be be either the pcb not sending the signal to valve or the timer not sending signal to pcb after the dhw has been used??

 

[oilman]

Is this gas or is it oil? Which model is it?

Read your post, and if you think it is clear to someone else, that's ok. If you think it is not that clear, please rewrite it so it is. It's possible to help when the information is clear, and sometimes when it isn't. However, in general, we aren't mind readers.

 

[borney1]

Sorry it is oil and its the 15/19 rs boiler.And its basically that after using the hot water-or turning the hot water to on position on the control box-the boiler then switches back to ch mode burner fires up but 2 way valve wil not move intill the ch has manually been turned off then back on again which is causing it to over heat

 

[oilman]

Probably a sticky valve.

,,,,,,,,,,,,,, Here are a few commas you can use in your next post, that should help the readability.

..... and a few stops if you need them

 

[wilhelm]

yep. i couldnt understand question.

i had the pleasure of trying to set up a danfoss programmable roomstat (rf one) the other day. ( im mean just put in times)...mmmmmmmm, perhaps i am thick .. or them clowns at danfoss have lost the art of communication. never mind the grammar.its all pictures and "events" .whatever that means.

sorry moderator to digress.

but i had to have a b£tch about it