Our old wall oven takes a while to light and then does so with a boom, and it takes a long time to heat up. Here are some numbers:

We open the oven door a little and turn on the oven. It takes 15 seconds for the hiss of the gas to be heard. It takes another 25 seconds for the burner to light. It then takes 21 minutes for the oven to come up to 350 degrees. (Once I left the broiler door open to watch what was going on and after listening to the hissing for more than a minute and beginning to smell gas, I stopped trying to turned off the oven.)

I did replace the ignitor 2 years ago.

What should my next steps be in trying to repair this oven? Thanks for you insights and help.

Nabeel

Thanks. I will try these things and report back this evening.

Check the resistance of your ignitor, should be between 50 and 150 ohms, if not it is bad

Very slow for a gas oven.

How it works is this. You program to bake, the ignitor comes on, and when the current draw on the ignitor reaches 3.2 amps it opens the gas valve to let in gas. A good ignitor maintains an amp draw of 3.2 to 3.7 amps during bake, now if the ignitor drops lets say to 3.1 amps the gas valve shuts off until the ignitor reaches 3.2 amps. So in your case, the ignitor is barely able to maintain the amp draw needed to keep the valve open, so the flame goes on and off thus your long preheat time. This will also cause the boom you are noticing, by unburned gas pooling in the oven. Hope this helps clear it up a bit for you.