A common problem at this time of year is ice formed at a filter at the tank outlet which restricts the flow of oil. Whilst it might be enough to start the boiler it cannot continue.
So if you have a filter there, you could see if its blocked by ice! Not all installations have a filter there!
Bob, lay a "temporary" pipe out from the tank to your fire valve (cover it well to protect it from the frost). You can the get the boiler going and do the digging when the soil is warmer.
Don't adjust the fuel pressure without using a pressure gauge which connects to the fuel pump "P" outlet.
In view of the above I doubt that the solenoid could be the primary fault!
Depending on the local temperatures, the oil could be becoming too viscous to flow if its about -10° in his location. Also there might be a build up of ice crystals blocking the pipe.
A kettle of hot water poured over the exposed pipe is a very easy thing to try.
Furthermore its often forgotten that its so easy to rig up a temporary one gallon tank in the boiler room for testing or temporary service. I think there is a Building Regulation limiting the volume of any indoor tank. ( 4.2 Gallons ? )
Churchills bunker has a small tank above the generator to supply fuel by gravity to the engine.
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