Lincoln Impinger Pizza Oven Troubleshooting

1. Oven Won't Heat

If your Lincoln impinger oven won't heat to the right temperature or maintain a constant temperature, make sure you set it to the correct temperature first. Continued heating issues point to a malfunctioning part or larger problems with your equipment. If a component needs replacing, contact an authorized technician to test any electrical elements and install the new part safely. Below are a few reasons your oven won't heat:

• Poor gas supply: Ensure the oven has enough gas to function by checking the gas tank.
• Gas valve closed or malfunctioning: Gas ovens have a manual shut-off valve that should remain open for the oven to function. Ensure the valve position is open, then check the connection to the gas line for damage.
• Faulty fan: Troubleshoot the cooling fan using the steps in the "Fan Won't Run" section.
• Faulty thermostat: First, check the thermostat voltage, then check the terminals for the oven cavity. If the terminals are open, close them and test the oven to see if the thermostat and control box reach and maintain appropriate levels. If not, test the capillary bulb placement or replace the thermostat.
• Faulty blower motor: Test voltage, then contact an electrician to check for opens, shorts, or grounds. Shut off the power and turn the motor to ensure it isn't locked.
• Faulty transformer: Check the voltage at the primary and secondary transformers. If there's no voltage, replace the burner transformer.
• Faulty ignition controls: Contact an authorized technician to test and replace the ignition controls.

2. Fan Won't Run

The fan prevents your impinger oven from overheating, so a broken fan can lead to other significant issues with your equipment. First, thoroughly clean your oven fan and remove any lodged debris. If the fan still won't run, contact an authorized technician to check the following areas:

• Poor power supply: Check circuit breakers and reset them if necessary. Ensure the power cord plug fully connects to the socket. If problems persist, measure incoming power and contact professionals.
• Faulty fuses and fuse holders: Check your fuses and fuse holders and replace them with new ones.
• Faulty thermostat: First, check the thermostat voltage, then check the terminals for the control box. If the terminals are open, close them and test the oven to see if the thermostat and control box reach and maintain appropriate levels. If not, replace the thermostat.
• Faulty power switch: Check the switch terminals and replace the switch if necessary.
• Malfunctioning motor: Check the motor's voltage, then turn off the motor and call an electrician to check for opens, shorts, or grounds that could affect the voltage. Turn the fan blade to ensure the rotor is unlocked.
• Shorted capacitor: Before testing the capacitor, discharge the stored charge to prevent electrocution. Then, check it for shorts or grounds.

3. No Control Box Cooling

If your control box is overheating, the malfunction could be caused by one of these issues. Remember to contact an authorized technician to replace any broken parts.

• Poor power supply: Check circuit breakers and reset them if necessary. Ensure the power cord is completely plugged in. If problems persist, measure incoming power and contact professionals.
• Faulty power switch: Check the switch terminals and replace the switch if necessary.
• Malfunctioning cooling fan: Check the voltage on the fan, then power the fan down and check for a locked rotor. If it's still malfunctioning, troubleshoot the fan using the previously listed steps.

4. Flame Won't Stay Lit

Gas-powered impinger ovens heat and cook food using a gas flame. If the flame won't light or flickers out frequently, here are a few possible causes for the problem:

• Faulty igniter or ignition control: Contact an authorized technician to test and replace the ignition controls.
• Poor power supply: Reset the circuit breakers and ensure the oven is properly plugged in.
• Malfunctioning flame sensor: Clean the flame sensor thoroughly, then try again. If the flame continues going out, contact an authorized technician to ground and repair it.

5. Low Flame On, No Main Flame

If your Lincoln impinger oven's main flame won't ignite, check that the temperature adjustment knob is in the correct position. Then, reach out to an authorized technician to diagnose the problem by examining the following areas:

• Malfunctioning transformer: Check the voltage at the primary and secondary transformers. If there's no voltage, replace the control transformer.
• Disconnected thermocouple: Check that the thermocouple is connected properly to the oven control. If it's connected but still malfunctioning, contact an authorized technician to test the thermocouple.
• Faulty temperature regulation valve: Ensure the valve opens and closes correctly, then call an electrician to check for opens or shorts in the operating coil. Replace the valve if necessary.
• Faulty oven control: If there is no voltage or read-out on the control display, contact an authorized technician to replace the oven control.

6. Intermittent Heating

The cooling fan and burner blower motor of your Lincoln impinger oven have internal thermal protection to prevent overheating and a temperature-related overload. If that protection is compromised, they can seize and cause intermittent heating of your oven. Follow these steps to resolve the issue:

• Overloaded fan: Shut the oven off and give it time to cool down. Ensure the oven has sufficient ventilation and thoroughly clean the fan to prevent damage.
• Overloaded motor: Shut the oven off, cool the motor, then check the internal thermal protection for damage. Move the oven away from the wall for extra ventilation and clean the motor. If the motor is still malfunctioning, make sure it isn't locked.

7. Conveyor Won't Run

The conveyor on an impinger oven moves food through the chamber to ensure it cooks properly. Many of the problems causing the conveyor malfunction are electrical, so contact an authorized technician to safely fix them. If your conveyor won't run, examine the following areas:

• Poor power supply: Check circuit breakers and reset them if necessary. Ensure the power cord is plugged into the socket. If problems persist, measure incoming power and contact professionals.
• Faulty fuses: Check your fuses and replace them with new ones.
• Faulty control switch or transformer: Make sure the switch terminals are continuous and replace the switch if necessary. Check the voltage at the primary and secondary transformers. If there's no voltage, replace the control transformer.
• Malfunctioning conveyor motor: Test the voltage supply to the conveyor motor. Contact an authorized technician to run tests and replace the conveyor motor.
• Faulty capacitor: Before testing the capacitor, discharge the stored charge to prevent electrocution. Then, call an electrician to check it for shorts or grounds.
• Faulty oven control: If there is no voltage or read-out on the control display, contact an authorized technician to replace the oven control.

8. Conveyor Motor Runs, But No Speed Display

A speed display malfunction will result in a "Belt Jam" message on the display screen. Examine the following areas to diagnose the problem:

• Faulty oven control: If there is no voltage or read-out on the control display, contact an authorized technician to replace the oven control.
• Malfunctioning conveyor motor: Contact an authorized technician to test the frequency output from the hall effect sensor. If the oven does not achieve the correct readings, replace the motor.

9. Inaccurate Time and Temperature Displays

While inaccurate time and temperature displays appear inconsequential, these problems lead to improper food handling and ruined food. Moreover, they can point to bigger issues with your oven's internal mechanisms. If your display is malfunctioning, contact an authorized technician to get your equipment running again.

Inaccurate Temperature Display

There are two possible causes for an inaccurate temperature display on your impinger oven:

• Oven needs reset: If you experience rolling numbers or lockup when a particular number appears, turn off the main fan switch for 15 seconds. If this doesn't work, contact your local electric company to ensure you have enough power at your establishment.
• Faulty thermistor or thermocouple probe: Contact an authorized technician to test, repair, or replace these parts.

Inaccurate Time Display

An inaccurate time display can be caused by one of the following underlying problems:

• Jammed conveyor drive motor: Turn the conveyor switch off to reset the machine, then wait 10 to 15 seconds and restart the conveyor. If the motor is still jammed, replace the motor stepper control.
• Damaged drive magnet: Check the drive magnet for damage and replace it if necessary.
• Malfunctioning hall-effect sensor: If the display shows "--:--", check that the hall-effect sensor is connected correctly. Replace the sensor if necessary.

Time and Temperature Not Displaying

If your Lincoln impinger pizza oven won't display the time or temperature at all, the malfunction is likely a power issue. Check the following areas and reach out to an authorized technician to resolve any electrical problems.

• Poor power supply: Check circuit breakers and reset them if necessary. Ensure the power cord is plugged into the socket. If problems persist, measure incoming power and contact professionals.
• Poor display lighting: If the display won't light up, contact an authorized technician to examine the wiring and power of the oven.