GE Profile range door locks on bake
Hey guys, I have a GE profile slide-in range (not 100% sure on age, was in the house when I bought it, could be as old as 2004) and anytime I try to use bake or broil the door locks and the heat shuts off. The oven will heat up a bit but eventually it turns off and the door locks, as if it's cooling down from a clean cycle or something. I don't think it happens at a specific temperature because the oven has been hot before and I'll turn it on to broil just to crisp something up and it will work for a minute or two before shutting off. How is the oven hot you ask? Convection works, so strange. Yesterday it did shut off on convection though, so trying to fix this problem in case it's getting worse. After multiple shut offs in a row a couple weeks back (kept turning it on broil) it did give me an F9 error code though, but only the once.
Any suggestions on how to trouble shoot this? Any voltage or resistance measurements to make on sensors or anything? Or does anyone know how to troubleshoot the F9 code at least? Thanks.