Thermo Products ome-72d36 service manual

All installations and services must be performed by qualified service personnel.

After pre-purge, does the oil primary produce a spark at the

ignition electrodes?

Yes

No

Is there 120 VAC across the ignition transformer?

Yes

No

Try resetting the oil primary control by depressing the RESET button. Check cad cell function. If all else fails, replace the oil primary.

Check wiring to the ignition transformer and the

electrodes. Also, check ignition electrode gap. Reset if necessary. Replace electrodes or ignition transformer.

While ignition electrodes are sparking does fuel valve open?

Yes

No

Does the oil solenoid

valve have 120 VAC across it during the ignition attempt?

Yes

Check wiring to fuel valve. If valve does not open, replace fuel valve.

No

Try resetting the oil primary control by depressing the RESET button. If this does not work, replace the oil primary.

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