Swarf obstructing combustion fan pressure tapping. Check both ends of pressure tapping – clear obstruction or replace pressure tapping.
Flue system blockage. Check and clear blockage.
Severe wind on flue terminal, or poor flue terminal location (eg, too close to roof). Check flue terminal location – re‐ locate if necessary.
Faulty combustion air pressure sensor. Check suction pressure – if sufficient, and fault recurs, replace pressure sensor on ICS (cut cable tie, un‐plug pressure sensor PCB, re‐connect new pressure sensor, fit new cable tie).
For Braemar Ecostar TQ, TQM, TQS, TQMD, BMQ Gas Ducted Heaters and Braemar Supernova TQS Gas Ducted Heaters.