What is one of the first steps in troubleshooting a gas appliance?

One of the first steps in troubleshooting a gas appliance is to check for proper gas supply pressure. This is crucial because if the appliance is not receiving the correct amount of gas, it may not function properly or at all. Gas supply pressure can greatly impact the performance of the appliance, affecting everything from ignition to operation.

By ensuring that the appliance is receiving the proper gas pressure, technicians can rule out gas supply issues as the source of the problem. Following this step can help narrow down potential causes more effectively.

While checking the appliance warranty, verifying the installation manual, and inspecting the efficiency rating are all important aspects of appliance maintenance and can be relevant later in the troubleshooting process, they do not address the immediate operational needs of the appliance in the way that ensuring proper gas supply does.