Gas oven not firing to correct temperature

To turn on the oven on your Defy Thermo Fan gas stove, follow these steps:

1. Make sure that the oven is properly connected to a gas supply and that the gas valve is turned on.
2. Turn the oven control knob to the desired temperature setting.
3. Press the oven ignition button to ignite the gas. You may need to hold the button down for a few seconds until the gas ignites.
4. If the gas does not ignite, check the ignition system and make sure that it is functioning properly. You may need to consult the stove's manual or contact a professional for further assistance.
5. Once the oven is ignited, it should begin heating up to the desired temperature.

Keep in mind that it may take a few minutes for the oven to reach the desired temperature, depending on the setting you have chosen. You can use the oven control knob to adjust the temperature as needed.
If you are having trouble turning on the oven on your Defy Thermo Fan gas stove or if you have any other questions, you may want to consult the stove's manual or contact Defy customer support for further assistance.

Based on the information you provided, it sounds like you have already done a thorough job troubleshooting and attempting to resolve the issue with your DCS Fisher Paykel gas oven.
If the oven is not reaching high temperatures even after you have replaced the igniter and dual gas valve, and swapped the circuit board from the working side, there are a few other things you can check:

1. Check the oven thermostat: The thermostat is responsible for regulating the temperature in the oven. If it is not functioning properly, it may be preventing the oven from reaching high temperatures. You can test the thermostat with a multimeter to see if it is functioning correctly.
2. Check the oven temperature sensor: The temperature sensor is located inside the oven and sends temperature readings to the control board. If it is not working properly, it can cause the oven to not heat up to the desired temperature. You can test the sensor with a multimeter to see if it is functioning correctly.
3. Check for obstructions in the gas line: If there is a blockage or obstruction in the gas line, it can prevent the oven from getting enough gas to heat up to high temperatures. Check the gas line for any debris or blockages and clean them out if necessary.
4. Check the regulator: The regulator is responsible for regulating the pressure of the gas going into the oven. If it is not functioning properly, it can prevent the oven from heating up to high temperatures. You can test the regulator with a gas pressure gauge to see if it is functioning correctly.

If none of these solutions solve the problem, it may be best to contact a qualified technician to further diagnose and repair the issue with your oven. They will have access to a service manual and specialized tools needed to diagnose and repair the oven.

The oven safety valve
(also called the gas valve) is the part that ensures that gas is not released until the igniter has reached the correct temperature needed to ignite the gas. While this part can fail, it is uncommon. If the hot surface igniter does not glow you should first verify that you have voltage to the circuit. This is a live voltage check and should be performed by a qualified person. If voltage is lost at the valve terminals then you should verify the continuity of the bi-metal in the valve using a multi-meter.

The oven burner igniter
commonly known as the hot surface igniter is used in modern gas oven burners to open the gas valve and to ignite the gas. As the igniter draws electric current it will heat to a high temperature and glow, as well as cause the bi-metal in the oven safety valve to warp and open the valve releasing the gas to be ignited. This sequence normally takes about a minute. Igniters come in both flat and round styles and are very fragile. If the burner does not light then you should check the igniter first. If the igniter does not glow at all, then check for power to the circuit. This is a live voltage check and should be performed by a qualified person. If power is present then the igniter may be open circuit and can be checked for continuity with a multi-meter. If the igniter is glowing, but the burner is not lighting, the igniter may be weak and still be at fault because it requires a certain amount of current draw to open the valve. This check requires the use of an amp meter and should be performed by a qualified person. If the igniter is defective then it must be replaced.


The oven safety valve
(also called the gas valve) is the part that ensures that gas is not released until the igniter has reached the correct temperature needed to ignite the gas. While this part can fail, it is uncommon. If the hot surface igniter does not glow you should first verify that you have voltage to the circuit. This is a live voltage check and should be performed by a qualified person. If voltage is lost at the valve terminals then you should verify the continuity of the bi-metal in the valve using a multi-meter.

The oven burner igniter
commonly known as the hot surface igniter is used in modern gas oven burners to open the gas valve and to ignite the gas. As the igniter draws electric current it will heat to a high temperature and glow, as well as cause the bi-metal in the oven safety valve to warp and open the valve releasing the gas to be ignited. This sequence normally takes about a minute. Igniters come in both flat and round styles and are very fragile. If the burner does not light then you should check the igniter first. If the igniter does not glow at all, then check for power to the circuit. This is a live voltage check and should be performed by a qualified person. If power is present then the igniter may be open circuit and can be checked for continuity with a multi-meter. If the igniter is glowing, but the burner is not lighting, the igniter may be weak and still be at fault because it requires a certain amount of current draw to open the valve. This check requires the use of an amp meter and should be performed by a qualified person. If the igniter is defective then it must be replaced.

The oven safety valve
(also called the gas valve) is the part that ensures that gas is not released until the igniter has reached the correct temperature needed to ignite the gas. While this part can fail, it is uncommon. If the hot surface igniter does not glow you should first verify that you have voltage to the circuit. This is a live voltage check and should be performed by a qualified person. If voltage is lost at the valve terminals then you should verify the continuity of the bi-metal in the valve using a multi-meter.

The oven burner igniter
commonly known as the hot surface igniter is used in modern gas oven burners to open the gas valve and to ignite the gas. As the igniter draws electric current it will heat to a high temperature and glow, as well as cause the bi-metal in the oven safety valve to warp and open the valve releasing the gas to be ignited. This sequence normally takes about a minute. Igniters come in both flat and round styles and are very fragile. If the burner does not light then you should check the igniter first. If the igniter does not glow at all, then check for power to the circuit. This is a live voltage check and should be performed by a qualified person. If power is present then the igniter may be open circuit and can be checked for continuity with a multi-meter. If the igniter is glowing, but the burner is not lighting, the igniter may be weak and still be at fault because it requires a certain amount of current draw to open the valve. This check requires the use of an amp meter and should be performed by a qualified person. If the igniter is defective then it must be replaced.

Most modern ovens use an electronic control board
to control the oven functions. These models will use the control board to operate the oven safety valve on a gas range or oven, and the bake and broil elements on an electric range or oven. If there is no power to the igniter circuit, or the element circuits, then you should check the control board to verify that there is power at the appropriate output relay. These are live voltage checks and should be performed by qualified persons only. If there is no output voltage then the control should be replaced.

The oven burner igniter
commonly known as the hot surface igniter is used in modern gas oven burners to open the gas valve and to ignite the gas. As the igniter draws electric current it will heat to a high temperature and glow, as well as cause the bi-metal in the oven safety valve to warp and open the valve releasing the gas to be ignited. This sequence normally takes about a minute. Igniters come in both flat and round styles and are very fragile. If the burner does not light then you should check the igniter first. If the igniter does not glow at all, then check for power to the circuit. This is a live voltage check and should be performed by a qualified person. If power is present then the igniter may be open circuit and can be checked for continuity with a multi-meter. If the igniter is glowing, but the burner is not lighting, the igniter may be weak and still be at fault because it requires a certain amount of current draw to open the valve. This check requires the use of an amp meter and should be performed by a qualified person. If the igniter is defective then it must be replaced.

The oven sensor: works with the oven control board to regulate the oven temperature. If there is an oven temperature problem, this sensor might be defective. The sensor can be tested by using an ohm meter. As temperature rises, the resistance measurement also rises. The manufacturer of the oven sensor determines the correct resistance, Oven temperature problems can be caused by other things, but this is one of the common causes.
Beware on some models now most of these ovens they are electronic and they are integrated into the control itself
some different sensor ohm readings at room temp. approx 16 ohms at room temperature and at 350?F it is 29~33 ohms.

The oven safety valve
(also called the gas valve) is the part that ensures that gas is not released until the igniter has reached the correct temperature needed to ignite the gas. While this part can fail, it is uncommon. If the hot surface igniter does not glow you should first verify that you have voltage to the circuit. This is a live voltage check and should be performed by a qualified person. If voltage is lost at the valve terminals then you should verify the continuity of the bi-metal in the valve using a multi-meter.


http://www.partselect.com/Repair/Range-Stove-Oven/Will-Not-Start/



https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Range-Stove-Oven/18---/Oven-won-t-turn-on-





http://www.partselect.com/Repair/Range-Stove-Oven/Will-Not-Start Oven Won Turn on

The problem is usually the igniter not reaching the correct amp draw .When the igniter does not reach the correct amp draw it may allow the gas valve to partially open or not open at all. The igniters are inexpensive and easy to replace. This video will walk you thru the correct procedure for testing an oven igniter. It may be a different model but the testing will be the same.You can also enter your model # for diagrams and illustrations of your specific model. Not all models are available. All parts come with installation instructions.

Most likely, you're oven igniter is not getting hot enough to open the gas valve to ignite the burner. It glows like normal, but does not reach the temperature required to open the gas valve. Replace the igniter. Before you replace that, make sure that the small shutoff lever on the appliance regulator was not accidentally closed, which would turn off the gas to the oven, while still allowing gas to the stovetop. The silver lever should be sticking straight out or up. Douglas