Baxi Bahama not firing

[bobbafett1964]

I have a bahama gas combi that recently has developed a fault. when I turn the hot tap on or the c/h the boiler seems to be starting up but before it fires a click is heard and the whole thing shuts down. both flow switches have been recently changed, system drained, expansion tank pressurised @ 1bar. Please, any advise so i can pass onto plumber to avoid incorrect diagnosis and costs.
many thanks

 

[DUAL-FUEL]

Is the pump running.

 

[bobbafett1964]

thanks, i am not sure but will check it out tonight.

 

[shaneo]

I have a bahama gas combi that recently has developed a fault. when I turn the hot tap on or the c/h the boiler seems to be starting up but before it fires a click is heard and the whole thing shuts down. both flow switches have been recently changed, system drained, expansion tank pressurised @ 1bar. Please, any advise so i can pass onto plumber to avoid incorrect diagnosis and costs.
many thanks

he need to be checking the fan and air pressure switch