While our customers are wholesalers, Packard knows that you, the contractor, have a choice. You are often presented with many buying options, and being well-informed about your purchase can help make your job easier and more successful.
This is why we have dedicated a section of our site for contractors. In this section, you will find helpful product tips, tools and some clips from our training classes. We’ve also provided a distributor locator so you can find the nearest wholesaler who can give you access to Packard products.
What is a flame sensor?
As the name implies, a flame sensor detects that a flame is present. In the case of gas furnaces, it is a device that assures that when the gas valve is open a flame is present. If flame is not present, the gas valve will close preventing gas from being released into the furnace. Without ignition, a buildup of gas could occur and would present a risk of explosion or fire.
The flame sensor consists of a flame rod inside a ceramic base. Some rods may be straight while others are bent at specific angles. At the shortest end of the rod protruding from the ceramic base is a connector or terminal which allows for AC power to be applied to the device. When properly installed the flame rod is located within the flame during normal operation. The flame rectifies a weak DC signal which can be measured in micro amps. If flame is not present, then this DC signal is not produced. This DC signal communicates through the control board.
The flame rod must be kept clean for the sensor to operate properly. Steel wool or fine sandpaper can be used to gently clean the rod if needed. If cracks or breaks occur in the ceramic, or if the connection becomes corroded or loose, the sensor should be replaced by an experienced professional.
Packard has developed a complete HVACR critical components training program, which has received approval by North American Training Excellence (NATE) - the leading certification program for HVACR technician, and the only test approved by the entire industry. Below are some video excerpts from our instructor led training courses which we hold at Wholesaler locations nationwide.
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