Commercial Gas Oven Won’t Start: 11 Fixes

Commercial appliances need care just like other appliances. If your commercial oven won’t start, usually the best bet is to hire a commercial appliances repair expert to fix it. However, we are here to give some solutions to your commercial gas oven issues.

Power Switch Is Off

This is the simplest cause of a commercial gas oven not starting. Check the power switch, if it’s off, turn it on so the oven powers up.

The Power Cord Is Not Plugged In

Speaking of simple causes of an appliance problem, an unplugged power cord could be the reason your commercial gas oven is not turning on. Plug in the power cord if not plugged in. If it’s plugged in, remove it, and plug it again firmly.

Power Switch Is Broken

The power switch could also be broken. If your oven is not starting up even when the power switch is on, it may be that the power switch is bad. However, there could be other reasons for this problem as well which we will cover after this. With usage, power switches wear out. They should be replaced by an oven repair expert.

Damaged Power Cord

A damaged power cord will fail to allow current to the oven. With a damaged power cord, the oven might not receive any power or it might receive power, but the oven shuts down suddenly.

Inspect the entire power cord after plugging it out. Look for bends, cracks, or worn insulation. Checking electric-powered items can be dangerous, so if you don’t find any visible problem, find an expert who can inspect the power cord and other parts of the oven.

Tripped Circuit Breaker

Any home or facility has a breaker box that has circuit breakers that distribute the electrical load and supply it to different parts of the facility. You should check the circuit breaker that powers the area or outlet where the commercial gas oven is located. If it’s turned off without anyone turning it off for a reason, it means the breaker is tripped.

A tripped circuit breaker could be a one-time instance or it may be a hint towards another problem. It’s better to get an electrician involved to check the breaker box and other related parts of the facility. However, if you think it’s a one-time incident, turn on the circuit breaker, and use the gas oven.

There is a way to spot that a tripped breaker is pointing toward another problem. It is when the circuit breaker trips frequently. This can be a result of an issue with the circuit breaker the gas oven, or any other appliance. So, a technician is required to determine the problem and fix it.

The Door Is Not Shut

Many commercial ovens are designed so they don’t turn on if the door is not shut. This feature is useful because in case the door is left open or not completely closed, the food won’t be cooked or baked as good because some heat will escape through the door. Moreover, it will also use up more gas to cook food resulting in low efficiency. Plus, an oven working when its door is open is a hazard, so it’s a safety feature as well.

Therefore, make sure that the door is closed completely. Better yet, open the door and shut it again carefully. If the gas oven doesn’t start, it could be a damaged gasket or microswitch. The gasket helps the door create a seal so no heat can escape the oven. On the other hand, an oven microswitch monitors the door and doesn’t let the oven power up when the door is open. Ovens usually have multiple microswitches. These components should be repaired or replaced by an expert only.

Some people consider an oven not starting if it turns on, but doesn’t heat at all. Let’s know some reasons for this issue.

Clogged Ignitor Or Burner

The ignitor is the part that uses electric power. When the oven needs to heat up or cook food, the ignitor heats up so the gas burner turns on. If the gas burner or the ignitor is clogged, you might see problems in the oven heating up. Hire a professional to clean the internal components of your commercial gas oven.

Faulty Ignitor

Speaking of the ignitor, another reason your oven is not heating at all could be a faulty ignitor. As it heats up to turn on the gas burner, when it won’t heat up due to a malfunction, the oven won’t heat. However, you should first check the power to the oven before concluding that the ignitor is bad.

A faulty gas oven ignitor can render an oven useless even though it’s quite affordable component and can be easily replaced by an expert. However, you should not delay the replacement if the ignitor is bad because a bad ignitor can lead to gas leaks. This is something you must avoid at all costs in a commercial kitchen where you have many gas and electric appliances.

No Or Insufficient Gas Supply

If your oven turns on, but the burner doesn’t work and the oven doesn’t heat up, you should also look for signs of a gas-related issue. It’s quite simple. No gas, no burner ignition. The ignitor will heat up, but the burner won’t turn on because of no or insufficient gas.

There is less chance of no gas because you may be running other gas appliances and if there were no gas, you would already know about it. However, you should still check the gas supply. More importantly, check out the gas connection that leads to the gas oven. There could be a leak or the connection could be damaged.

Any gas-related issue, especially if it’s a leak, should be fixed as soon as possible because it’s a fire hazard. if you to know other signs of a gas leak, there may be a hissing sound near the leaking area and a natural gas smell.

Thermocouple’s Position Might Not Be Right

The thermocouple is the component that closes the gas valve when it gets the signal that the pilot light is extinguished. It’s an important component for ensuring the safety of your oven and the health of people around it. If it’s not working correctly, the gas flow won’t cut off. It can cause serious problems.

This issue can be detected by an expert only who will tell you that the thermocouple needs to be adjusted.

Thermocouple Is Bad

As we explained a thermocouple plays a crucial role in opening and closing the gas valve, if it becomes faulty, your gas oven will not receive gas and won’t heat up. In the case of a faulty thermocouple, the only and easy way is to replace it. An appliance repair professional can easily detect a bad thermocouple and will tell you if you need to replace it.


You can try a few things if your commercial gas oven won’t start such as checking the power switch, the power cord, the circuit breaker, the gas supply, and a few other things. However, if you can’t detect the problem, trust a commercial gas oven repair Springfield technician to inspect the oven and the power supply, suggest fixes, and perform repairs or replacements.