All installations and services must be performed by qualified service personnel.
After fuel valve opens, does the burner ignite?
No
Is oil present in the fuel line at the valve?
Yes
No
Check the fuel supply. 
Open all manual shutoff valves serving the unit.
Purge any air in the fuel line.
Yes
Are the ignition electrodes |
| No |
| Reposition to |
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positioned correctly? |
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| correct location. | |
Yes |
Check for blocked or severely worn burner nozzle. Clean or replace as required.
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Does the burner stay | No | |
lit past proof of flame | ||
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check? |
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Yes |
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Yes
Is the oil tank full of fuel? Is the fuel clean without contaminates?
Is the fuel filter dirty?
| Add or replace fuel and fuel |
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No | filter. Also, check cad cell |
| for proper operation. |
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Does the fan timer | No | |
energize the circulating | ||
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air blower after the 56 |
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second time delay? |
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Yes
Check settings on fan timer against those on connection diagram. Is blower still inoperable
after time delay with fan timer set correctly?
| Measure voltage | |
Yes | on the circulating | |
air blower terminals. | ||
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| Is it 120 VAC? | |
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Yes
Does blower wheel spin freely?
Yes
Is blower motor
capacitor functioning
properly?
Yes |
37Replace motor
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| Check wiring to |
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| blower. If okay, |
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No |
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| set fan selector |
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| switch to manual. |
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| If fan operates, |
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| replace fan timer. |
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| Check for blower wheel | ||||
No |
| rubing against housing | |||
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| or motor shaft spinning | |||
| freely. Adjust or replace | ||||
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| as necessary. | ||
No |
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| Replace blower |
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| motor capacitor. |
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