Why won't my commercial oven's pilot light stay lit? Common causes, what you can check, and when to call technicians.
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Food debris, grease, or carbon buildup can obstruct the pilot orifice or the main burner ports, preventing a stable flame or causing it to extinguish.
The thermocouple is a safety device that senses the pilot flame and signals the gas valve to stay open. If it's dirty, bent, or failing, it may not detect the flame, causing the pilot to go out. A thermopile is similar but generates more voltage.
A draft from an open door, a malfunctioning exhaust fan, or blockages in the oven's ventilation can disrupt the pilot flame, causing it to flicker or go out. This can also be related to the building's overall ventilation.
Low or fluctuating gas pressure from the supply line can prevent the pilot light from igniting properly or staying lit. This is often an issue with the building's gas system, not the oven itself.
The gas valve controls the flow of gas to the pilot and main burners. If the valve is malfunctioning, it may not maintain consistent gas flow to the pilot light, causing it to extinguish.
Ensure no strong drafts are blowing directly onto the pilot light. Close nearby doors or windows and turn off any powerful exhaust fans temporarily to see if the pilot stays lit.
Visually inspect the pilot light assembly and the main burner ports for any obvious signs of food debris, grease, or carbon buildup. Do not attempt to clean if you are uncomfortable.
When attempting to light the pilot, listen for a steady hiss of gas. A weak or sputtering sound might indicate a pressure issue.
Ensure the tip of the thermocouple is positioned directly within the pilot flame. Sometimes, vibrations can cause it to shift slightly out of the flame.
You smell gas.
Natural gas is highly flammable and explosive. A gas leak requires immediate professional attention to prevent fire or explosion.
The pilot light repeatedly goes out after a few minutes, or you cannot get it to light at all.
This often indicates a problem with the gas valve, thermocouple, or gas supply, which requires specialized tools and knowledge to diagnose and repair safely.
You suspect a problem with the main gas supply or pressure to the oven.
Issues with the building's gas lines or regulators are beyond the scope of oven repair and can be dangerous if tampered with.
Cleaning the burner assembly or thermocouple doesn't resolve the issue.
Further diagnosis of internal components like the gas valve or safety sensors is needed, which requires professional expertise.
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Look up your brand's error codes for commercial oven pilot light won't stay lit — we cover the most common codes for each brand we service.
This page provides general diagnostic guidance for commercial oven pilot light won't stay lit. Specific causes and repairs vary by appliance brand, model, and condition. For accurate diagnosis, contact a licensed appliance repair technician. Repairs involving refrigerant systems, gas lines, or high-voltage circuits require certified professionals — DIY attempts on these systems may be illegal and dangerous.
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