Why does my oil furnace keep triping reset after 10 sec of running i have to have thermostat all way up for it to run i changed primary control box, nozzel, electrodes and thermostat any ideas
There are many reasons an oil furnace will trip out. The control box is looking at Flame, draft, fuel supply, water levels in a FHW system, heat exchanger (water) temps, fan function (FHA) fyreye, etc. A problem with a circulator pump will cause an water high temp shutdown for example. A one hour service call from a licensed tech probably would have cost less than replacing a bunch of parts that are not the problem. My advice is always to consult a pro unless one is equipped with the knowledge and tools to do the job.