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| not stay on, check the reset button for the ignition |
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| control. If the above check okay, replace ignition control. |
Oven will not heat | Main fan | If not operating, refer to “Oven fan will not run” |
S/N N31349 and |
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|
Above |
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| Gas supply | Check for adequate gas supply and be sure that the |
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| manual gas shut off valve is open. Also check flexible |
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| gas line connection.. |
| Air pressure switch | Check air switch terminals for supply voltage to |
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| terminals COM and NO. If voltage is present on one side |
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| only, check for air tube blockage or misalignment. If |
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| these are okay, adjust air pressure switch or replace |
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| switch as needed. |
| Oven cavity | Terminals are normally closed, opens at 350°C (660°F). |
| thermostat | If open, reset and test oven for proper operation. If |
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| thermostat will not hold for maximum temperature, and |
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| oven is not exceeding control setting, check for proper |
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| location of the capillary bulb in its spring holder. If above |
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| checks are okay, replace |
| Ignition control | Check for supply voltage to ignition control at terminal |
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| #1 and neutral. If no voltage is present, trace wiring back |
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| to |
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| supply voltage to burner blower motor at terminal #8 and |
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| neutral. If no voltage is present, wait 30 seconds, reset |
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| ignition control, and re- try. If the above fails, replace |
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| ignition control. |
| Burner reset switch | Switch is normally open. Check to see that the switch |
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| closes when reset button is pushed. Replace as needed. |
| Burner blower motor | Check for supply voltage to burner blower motor. If no |
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| voltage is present, trace wiring back to the ignition |
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| control. |
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| WITH POWER OFF: Turn blower wheel to check for |
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| locked rotor. |
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| If supply voltage is present and motor does not run, |
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| replace burner blower motor. |
| Burner blower motor air | Check for air pressure switch to be switching from “NC” |
| pressure switch | to “NO”. Check for air tube blockage or misalignment. |
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| Adjust air pressure switch. If the above fails, replace air |
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| pressure switch. |
| Ignition control | A |
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| burner blower motor starts. Check for high voltage spark |
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| output from the ignition control. If there is no high |
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| voltage spark output, check reset button for the ignition |
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| control. If there is still no high voltage output, replace the |
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| ignition control. |
| Igniter/sensor assembly | Check for visible damage to the igniter/sensor assembly. |
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| If there is visible damage to the igniter/sensor assembly, |
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| replace. If there is no visible damage to the components, |
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| and no spark, replace the igniter/sensor assy. Also |
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| check for frayed or damaged wires in burner tube. |
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| Replace components as needed. |
| Ignition control | Gas valve should open as the ignition control generates |
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| the high voltage spark. Check for supply voltage to pilot |
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| valve at terminal #5 and neutral. If no voltage is present, |
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| check reset button for the ignition control. If there is still |
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| no voltage to the pilot valve, replace ignition control. |
| Gas valve | Check for supply voltage to pilot valve terminal #5 to |
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| neutral, if there is no voltage, trace wiring back to |
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| ignition control. If there is supply voltage, connect a |
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| manometer to the pressure tap fitting on the gas valve. If |
8 | Impinger I – Adv Digital – Gas Service Manual – International |