Diagnostics and Specific Fault Finding
Gas Heating diagnostics and fault finding
TG / TH DGH FC12, FC13, FC14 P-100 (4/5 star) pressure switch related faults ⚠️ Safety Notice – Gas Heating Products This appliance must only be insta...
Thu, 16 Jul, 2026 at 11:04 AM
TQ DGH FC4, FC19 - FC4 Thermistor > 70 deg C during run, FC10 HX OT1 opened, FC19 HX OT2 opened ⚠️ Safety Notice – Gas Heating Products This applian...
Thu, 16 Jul, 2026 at 11:10 AM
TG / TH DGH FC1, FC2, FC3 P-100 (3 star) P-55 (4/5 star) pressure switch related faults ⚠️ Safety Notice – Gas Heating Products This appliance must on...
Thu, 16 Jul, 2026 at 11:08 AM
TQ / TQR DGH – FC32 & FC45 Combustion Air Pressure Too Low at Start or During Run ⚠️ Safety Notice – Gas Heating Products This appliance must only be...
Thu, 16 Jul, 2026 at 11:11 AM
Start-up and Run Flowcharts TQ Modulating TQS4 TQS5 TQM5 TQA5 TQMD5 TQM6 TQS6 TQS7 SSQ5 ⚠️ Safety Notice – Gas Heating Products This appliance must on...
Thu, 16 Jul, 2026 at 11:13 AM
TQ DGH - FAULT RESET Button Location on ICS PCB - next to gas valve plug (yellow, black and orange wires) ⚠️ Safety Notice – Gas Heating Products This ...
Thu, 16 Jul, 2026 at 11:15 AM
TQS7 FC23 - Room fan not running - Motor/Speed Sensor Diagnostics ⚠️ Safety Notice – Gas Heating Products This appliance must only be installed, commis...
Thu, 16 Jul, 2026 at 11:13 AM
TQ DGH - FC7 intermittent TQ3* & BMQ3* Cross ignition air disturbance ⚠️ Safety Notice – Gas Heating Products This appliance must only be installe...
Thu, 16 Jul, 2026 at 11:16 AM
Start-up and Run Flowcharts TQ Two-Stage TQS3 TQ4 TQ5 SSQ4 ⚠️ Safety Notice – Gas Heating Products This appliance must only be installed, commissioned,...
Thu, 16 Jul, 2026 at 11:17 AM
TG TH - FC11 Displayed to user on the Spectrolink CC control ⚠️ Safety Notice – Gas Heating Products This appliance must only be installed, commissione...
Thu, 16 Jul, 2026 at 11:18 AM