Paul,
We had an oven issue last year. The oven never did light up, and if it did, you would only see the occasional puff of flame emitting from the main burner.
I also used the link that James has provided, I think I aged about 3 years in one weekend trying to figure out how this oven works. But I finally wrapped my head around it all, after slowly following and understanding each step of the troubleshooting procedures.
It's a mind bender to say the least.
First, you need to figure out which of the two models you have. It's based on the manufacturing date.
The oven pilot light has two distinct flame levels. Very low when the thermostat is low or off; then a higher flame when you turn up the thermostat setting . In short, the thermostat only controls the pilot light flame level. When you raise the thermostat to a higher pilot light flame, this heats up a nearby thermocouple that controls the oven gas valve. It will take about 10 to 15 seconds of heating this thermocouple before you will see an actual oven burner start-up.
If both pilot and oven burner goes out, there's are two possibilities depending on which model you have.
If your pilot light module has one thermocouple probe in the flame: then chances are you have dirt in the pilot light orifice. Its easy enough to open up and clean.
If the oven burner goes out while the pilot light is still in high flame mode, then you need to clean or replace the oven control valve ( the one with the thermocouple attached. Reeeaaalllll expensive! Try cleaning by removing the valve and gently blowing air backwards through the office of that unit.
If your model has two probes in the flame area: then you may have a problems with either the pilot light safety valve and/or it's thermocouple, or the same pilot light orifice that's mentioned above.
Our problem was starvation of propane fuel. I found a very small slotted screw inside the center of the thermostat barrel, located under the thermostat knob. Very carefully turn the screw clockwise only slightly, AND DO NOT PUSH INWARDS WHILE DOING THIS ADJUSTMENT!!!! There is a mercury bulb located inside that you could damage permanently. Use a clean, sharp tipped, or preferably new flat bladed screw driver tip for this and it wouldn't hurt to add a couple of drops of light oil in the barrel before doing this. It's likely to be hard to rotate since it's never moved for 30 plus years.
Best wishes.
Jack Dokter
Nine Lives, 26C W21 099
Penetanguishene, On