Flames Sensors

Lets take a look at how a flame sensor works and why we need one on our heating equipment. A flame sensor is also known as a flame rectifier. Without getting too technical what that means is that it only takes part of an electrical signal or divides it if you will. When there is a flame burning there is actually a small amount of electric being passed through the flame sensor's wire, through the flame sensor rod, through the flame and finally goes to the burner or (ground). If this path is not compllete at a predetimed amount of ampreage (flow) then the control  or "brain box" tells the flame (gas valve) to shut down. All this is done in fractions of a second so there is minimal chance of raw gas building up in the furnace or boiler. It will  shut down the gas valve  in the event that the flame is lost or not ignited at the start of the ignition cycle. Alll this is done in milliamps which is 1/10,000 th's of an amp. o put that in perspective... An incandsent light bulb uses about 1/10 of an amp. The smallest crack in a flame sensor can cause problems that can drive an expert hvac mechanic insane. It is critical that your flame sensor is in perfect condition in order for your heatng appliance to run properly.

We stock hundreds of flam sensors for all furnae and boilr makes and models. Give us a call with your furnace or boiler model number and we will match it up and quote you a price and aprox. delivry time. If you are not sure where your model numbe is for your heater than check out our How To... Learning Center to find the model number for your make of furnace or boiler.

USA Supply has your flame sensor in stock now. Call now for shipping or pick up your flame sensor at our warehouse located in Chicago. We sell flame sensors directly to homeowners.