Poor circulation Bleed radiators, check system water pressure; if low refill via filling loop
Ignition failure Ensure gas supply is turned on. If meter is a prepayment type ensure there is credit
Circulation Bleed radiators, check system water pressure; if low refill via filling loop
Overheat Bleed radiators, check system water pressure; if low refill via filling loop
PCB error Engineer visit required
Fan speed error, too fast Engineer visit required
Fan speed error, too slow Engineer visit required
Controls error Engineer visit required
PCB error Engineer visit required
Flue sensor error Engineer visit required