TQ Gas Heater FC7 – Ignition Failure (No Flame Detected) Troubleshooting Guide
Braemar TQ Gas Heater FC7 – Ignition Failure / No Flame Detected


⚠️ Safety Notice – Gas Heating Products

This appliance must only be installed, commissioned, serviced and repaired by suitably qualified and licensed personnel.


Before commencing work, complete a task-specific risk assessment and ensure gas and electrical safety requirements, ventilation provisions, safe access, adequate service clearances and appropriate PPE have been considered. All work must comply with applicable regulations, standards and manufacturer requirements.


Particular care must be taken when working around gas systems, electrical components, combustion products, hot surfaces, moving parts, roof spaces, ceiling spaces and confined spaces.


Do not proceed if safe access, required clearances, ventilation requirements, confined space risks or appropriate safety controls cannot be achieved and maintained. 


Safety takes priority over diagnosis, repairs, installation schedules and customer expectations. If the task cannot be completed safely, it must not proceed until the risks have been adequately controlled.


What FC7 means

FC7 indicates the heater has attempted ignition but no flame was detected.

The unit will shut down for safety if a flame signal is not confirmed.


Summary

FC7 is an ignition failure fault.

The heater has started its ignition sequence but no valid flame was detected.
In most cases, the fault is related to gas supply, ignition, flame sensing, burner condition, or another issue preventing normal ignition.


Common symptoms

You may see one or more of the following:

  • Heater not starting
  • Igniter operates but burner does not light
  • Heater attempts ignition then shuts down
  • Repeated ignition attempts (lockout)
  • FC7 displayed on controller or in fault history


Fault code history can be accessed using a MagIQtouch controller:

SETTINGS/SERVICE/GAS HEATER 01/7378 CONT/FAULT LOG


YouTube Video - MagIQtouch Heater Fault Log 


Related articles





Click here to play video : - MagIQtouch service operating screen ducted gas heater 



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If all burners DO NOT light and the flame does not touch the flame sensor and gas pressures have been confirmed as correct
  • Check flames travel freely across all burners at ignition
  • Check burner slots are aligned
  • Check cross-lighting slots on burners for obstructions - clean/clear is required

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To assist in the field with issues of intermittent fault code 7 and 11, we have introduced 2 x new kits 
that replaces both sparker and sensor probes

Kit Pt# 651799 - replaces sparker and sensor in condensing heaters (PVC flues and drains)

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Kit Pt# 651800 - replaces sparker and sensor in non-condensing heaters (metal flues and no drains)

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Click on link to view clip 

YouTube video Dual probe sparker