Appliance units nowadays are much more complicated and sophisticated than years before. Issues that handymen could easily handle then, are a matter of concern for focused specialists today. DIY attempts without skills and proper education will only make the situation worse. You should never even attempt to repair any appliance connected to the gas supply. Gas leaks are extremely dangerous and are always considered an emergency. Another pitfall is a manufacturer's warranty for your unit. If it is still active, once you try to dismantle the device by yourself, it will be lost entirely. And if you'll find yourself unable to complete the job afterwards, that would mean huge extra costs for your budget. So in case of any malfunctions with your appliance, if you are not 100% confident that you can fix it, call a home appliance repair specialist and let him help you with the action plan. That's free to do and usually saves time and money.