Oven safety valve or ignitor

I have a Crosley range, model C31113WAV, ser# 31882513uv. I have replaced the oven ignitor in the past. My current problem lies with the oven, occasionally it lights just fine, occasionally it does not. I have not checked the current draw of the ignitor yet, however if you tap the safety valve it fires the oven. My question is should I change out both the ignitor and the safety valve when I repair it. I hate to have to open it twice. I also saw on the app website 2 different valves listed so I want to make sure that I order the correct one. Thanks