Can you tell me where that resistor is located? If it is just any resistor you probably can get it from any electronic store.
I have the same as your Monitor. I have used it quite satisfactorily up to a week ago it stopped running. I have checked for fuel by disconnecting the copper tube to the combustion chamber and about a cupful of kerosene poured out. This is unusual as I have done this several times before to clear the carbon build up inside where the tube enters. I have checked the igniter for continuity and it has. When it tries to light there is 2.5vAC to the igniter but I do not see the glow through the sightport at all.
Do you have any access to manuals or know knowledgeable service at all?