Ideal Boiler Function + Flame Sensor & Gas Ionisation
Carbon atoms produce CH Radicals which then produce CHO+ & Electrons in the flame.
Some faults below.
LE means the control unit is faulty IF it does not clear with power off, wait 10 seconds, then reset and retest.
LF means the control unit did not see a flame, it will try 3 times. No Gas, Faulty Gas Valve, Faulty Spark or electrode in video faulty
LA means Overheat error, possible pump failure or temp sensor.
L8 means Fan Error
L9 means the boiler has overheated. Water pump problem or blockage in water system.
H1 means Central Heating 'flow' temperature sensor error
H2 means Central Heating flow'Return' temperature sensor error
H3 means Domestic Hot Water temp sensor error
H4 means Dry Fire temp sensor error
H5 means the jumper pins are in the wrong position or missing
HF Flame Detection error

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