TROUBLE SHOOTING GUIDE
PROBLEM POSSIBLE CAUSE SOLUTION
Pilot will not light No gas Check gas is turned on.
Safety interlock preventing Wait 5 minutes & attempt to relight.
Operation.
Control knob not fully pressed. Ensure control knob is being fully
pressed.
Disconnected piezo igniter. Connect piezo cable.
Air in gas lines Call your qualified service technician.
Insufficient gas pressure. Call your qualified service technician.
Damaged pilot hood. Call your qualified service technician.
Blocked orifice. Call your qualified service technician.
Defective control valve. Call your qualified service technician.
Faulty piezo igniter Call your qualified service technician.
Pilot lights but goes out Insufficient flame impingement on Call your qualified service technician.
when the control knob thermocouple.
is released.
Incorrect position of thermocouple. Call your qualified service technician.
Weak milli volt current. Call your qualified service technician.
Poor electrical contacts. Call your qualified service technician.
Burners will not light. Control knob may not be Turn control knob anti-clockwise to a
turned to correct position. heat output setting.
Air in gas lines. Call your qualified service technician.
Incorrect inlet pressure. Call your qualified service technician.
Blocked orifice. Call your qualified service technician.
Faulty control valve. Call your qualified service technician.
Heater operates normally Blocked flue. Clear blockage.
then goes out within Insufficient draught leading to the
10 minutes. switch activating. Call your qualified service technician.
Defective vent safety switch. Call your qualified service technician.
Noise in pilot/burners Excessive gas pressure. Call your qualified service technician.
Draught hood spillage. Chimney or venting system not Increase height.
high enough.
Chimney or venting system blocked Clear blockage.
Leaks in chimney or venting Seal joints.
system joints.
Insufficient air supply when other Call your qualified service technician.
air using appliances are in
operation.
Flame characteristics:
Hard sharp flame Excessive primary air. Reduce air intake.
Yellow flame Insufficient primary air supply. Increase air intake.
Over sized burner orifice. Call your qualified service technician.
Lifting flame Excessive gas pressure. Call your qualified service technician.
Small sharp flame Clogged burner orifice. Call your qualified service technician.
Semi clogged gas supply line. Call your qualified service technician.
Excessively low gas pressure. Call your qualified service technician.
Rev:002 DP 060822
15
Aga,
Station Road,
Ketley, Telford,
Shropshire, TF1 5AQ,
UK
N00398AXX
(20 pages)
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