Heater won't refire after it warms up. Hi, Thank you for your solution reply, however I cannot

Question

Hi, Thank you for your solution reply, however I cannot find a CAD flame sensor on of the Ready Heater Parts web sites. They do mention ignitors and ignition control assembly. Are they in anyway the same thing as the CAD flame sensor ? If not, do you know who I can purchase this part through ? Thanks again, Mike