I recently replaced the igniter in our stove. Now it won't heat up to temperature and also it won't shut off when we turn it off. Is this a safety valve issue?
With the unit not heating to temp you will want to test the oven sensor for 1090 ohms at room temperature. If the resistance checks ok then the sensor is good but if not then it is bad and would need to be replaced. For the oven not shutting off, if the unit itself shuts off but the burner is not then yes the oven safety valve sounds like it is stuck open. If the control is not allowing shut off then the control would be faulty and would need to be replaced.