pilot light wont ignite?

There could be any multitude of reasons why the pilot doesn't light

A gas engineer would systematically work through the fault finding guide to try to figure out what the problem is

http://library.plumbase.co.uk/flipbooks/RE/pttpro30e_20452_t/mobile/index.html#p=27

Does fan operate YES/NO

Has overheat tripped YES/NO

Is PCB FUSE ok YES/NO

Etc etc

With the limited amount of information provided by you
You don't have any option other than to call a gas engineer out to
1 diagnose the fault
2 repair the fault

Anon
December 2018