Attend site fist thing in the morning after its locked out, remove burner and look at blast tube, if its wet(oil) replace EBI, if its dry change the coil.
These are the 2 most common faults on a sterling for the problem you describe.
This is all brand new to me but the transformer was fine as was the coil. I forgot that when i put on the new pump that would ahve meant a new coil.
Anyway i removed the rusted tube the sits above the photo cell. Apparently because it is rusted it doesnt reflect the light properly and causes lock out problems. Everything running okay, SO FAR!!!!!
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local