I'm troubleshooting a problem with my oven, an electric ignition gas oven. It's an old model, Whirlpool SF375BEP N2. I'm in a financial bind and replacing it is not an option at the moment.
I noticed that, although it was not working, the broiler would turn on. This made me think the problem was with the ignitor, so I replaced that. At first it seemed to work fine — the oven turned on when I tested it, and it could even run a cleaning cycle.
But after that it wouldn't turn on, and I had to scramble to improvise for Thanksgiving. After some experimentation I found that I could just light the broiler (at the top of the inside of the oven), and after a while I was able to turn the oven on and it worked normally. But after a while even the broiler wouldn't light. I found that the same trick worked if I set the oven to a self-cleaning cycle, where it would light just fine and eventually the oven could be turned on (though if I took too long it would get too hot to slide the oven lock back and I'd have to wait).
For as long as I've had the oven it has taken a while to light the stove. The range/burners light instantly, but the oven and broiler would take maybe 15-45 seconds to light. In researching to post this question I found Why is my gas stove taking 30+ seconds to light? which (although it concerned the rangetop rather than oven below it) seemed similar enough to my underlying situation that I wonder if my problem is similar: gas feed, regulator, etc. I don't know much about working with gas — the most I've done is to install a water heater — so I thought I should ask here before going too far, either on my own or with a professional. (In the latter case I'd want to be sure I had the problem figured out to avoid spending the cost of a replacement on repairs.)
Best Answer
As others have suggested, the first thing to check is that all your valves are fully open.
However, since you don't seem to be having trouble getting up to temperature, it seems less like a supply or regulator problem and more likely to be about location of the pilot / ignition source. Either it's not clean, or position relative to the gas is off (could be not enough gas, or not enough supply air). Make sure your stove is level. If that doesn't help, see if you can clean/replace or adjust it.
A good generic step by step troubleshooting guide can be found here, which lists the order of trouble shooting for a milivolt ignition (the kind of pilot you hear clicks) with as: