Worcseter combi boiler gurgling and igniting when off

[Renovationgirl]

Our 4 yr old combi boiler as started gurgling in c/ h pipes then coming on on it's own in middle of night ( and day) - it ignites for a moment then switches off .
We have a wireless room thermostat system.
The temperature is in the 70 s at the moment,

Any ideas?

 

[45yearsagasman]

Pressure reading on the system is? Model of boiler would help. Preheat on?
So many questions.

 

[Renovationgirl]

Its a 4 yr old Worcester Greenstar 30 cdi combi.
Not sure what "pressure reading " means but 46 is shown on display.
Also don't know what " pre heat" means either!

 

[Agile]

Maybe you need to call an engineer?