Identified:- Three faults on remote controlled fire.  Model 86
1.  On PCB, triac gate-cathode short circuit  fire will not come on at all.  Replace with BTA08 600C about £1 to buy from RS
2.  On mains connector neutral wire slight corroded, strip back and reconnect
3.  Short range control.  RF receiver out of tune, space out the turns on the big coil a bit
These cures worked for me.  If you are not sure about tackling these faults yourself, buy a new PCB
                
 Michael Denton. med2003 at ntlworld dot com
                
 June 2013