Brivis buffalo 52 gas heater pilot light won't stay lit

Matt requested 3 quotes from Heating Professionals in Lane Cove

We have a Brivis 52 external unit ducted under floor heating system. The pilot light lights, but doesn't stay on.

Would like to have our Brivis Buffalo tested to see if it works,
need to know if its safe to use, how to use it. we have not been told if it...

Have a vulcan gas wall heater that needs to be fix, not working
Need to service/fix a Vulcan gas wall heater, thats not working at all

Rinnai convector 417 does not ignite
press button, sounds like starting but fails to ignite and then switches off...