Heater wont light. I have a fairly new 170000 ready heater that wasnt pumping fuel I found that

Question

I have a fairly new 170000 ready heater that wasnt pumping fuel I found that the rotor assembly was broke and replaced it it now pumps fuel and sprays out nozzle but wont ingnite there is also a new ingnitor that has been installed . you turn on it glows fan starts and starts pumping fuel but wont ignite