Was my smart thermostat installed incorrectly? Or what is the issue?

[RenzoPan]

When I set it to be on via phone, light A comes on (telling it to be on), but light B won’t come on, so the boiler doesn’t start. I either need to set A on and off several times via phone, or turn it off and on again via switch (C).
When I set the water to be on, it works instead, and green light B does come on.

What can it be? If the wiring had been done badly, it just wouldn’t work right? Then what it is?

• Worcester Bosh Greenstar Ri boiler
• Drayton wiser system

 

[ShaunCorbs]

Could be wiring or a port valve switching on and off a few times leads me to port valve

 

[RenzoPan]

Could be wiring or a port valve switching on and off a few times leads me to port valve

Could you clarify this bit?

port valve switching on and off a few times leads me to port valve

As additional info, I used to have a different thermostat - Honeywell - with a timer, and I never experienced these issues.

 

[ShaunCorbs]

Turn the heating on via the app and wait an hour might be a delay / in x the heating will come on etc

 

[RenzoPan]

Turn the heating on via the app and wait an hour might be a delay / in x the heating will come on etc

But with the old thermostat (not smart, no app, just wall panel) it used to turn on automatically…

 

[ShaunCorbs]

But with the old thermostat (not smart, no app, just wall panel) it used to turn on automatically…

There might be a delay / its manufactured to do this

 

[RenzoPan]

There might be a delay / its manufactured to do this

Manufactured to not turn on and heat up my place when I want it to? Seems rather odd.

 

[Murdoch]

Begs a question about who installed the smart thermostat and was it tested functionally

 

[gmartine]

Is there any delay when you manually overide the system?