halstead ace high fault

[fronteratech]

i have been trying to find what is causing the problem been through the manual looking at wiring diagram but cannot find the answer

the problem is that when the boiler is on DHW it also brings heating on

on recently started doing this its not set to heating DHW only but it seems to think its on both .

the DHW works as it should but we have heating on as well

 

[picasso]

Your diverter valve is sticking and not closing off the central heating when you run a hot tap.

 

[fronteratech]

Your diverter valve is sticking and not closing off the central heating when you run a hot tap.

really thanks for that have been doing a bit of reading up on this shall order up a service kit and fit