Quick Answer
Auto-ignition failures on propane ranges are commonly caused by clogged pilot orifice, improper pilot flame adjustment, and incorrect regulator settings.
Incorrect Pilot Flame Adjustment
Proper pilot flame size is crucial for auto-ignition. If the pilot flame is too small, it may not be able to sustain the auto-ignition process, leading to failure. A pilot flame size of 1/4 inch to 1/2 inch (6-13 mm) is typically recommended for most propane ranges. If the flame is too large, it can cause the regulator to over-pressurize, leading to regulator failure.
Clogged Pilot Orifice
A clogged pilot orifice is another common cause of auto-ignition failure. The pilot orifice should be checked and cleaned regularly to ensure proper gas flow. If the orifice is clogged, it may cause the pilot flame to be weak or inconsistent, leading to auto-ignition failure. In some cases, the orifice may need to be replaced if it is damaged or corroded.
Incorrect Regulator Settings
The regulator on a propane range is responsible for controlling the pressure of the propane gas. If the regulator is not set correctly, it can cause auto-ignition failure. The regulator should be set to the recommended pressure range, typically between 10-14 inches of water column (2.5-3.5 kPa). If the regulator is set too high, it can cause the pilot flame to be too large, leading to regulator failure. If it is set too low, it can cause the pilot flame to be too small, leading to auto-ignition failure.
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