Furnace Safety Mechanisms                                                                                           

Furnaces are intrinsically dangerous. They use to thousands of degrees explosive combustible materials. So furnace safety is a very important subject to know for any Denver HVAC tech. However the task of the tech is difficult because every heating equipment manufacturer has different controls.

Ignition controls are the first line of safety. Honeywell is the main supplier but there are also proprietary ignition controls made by third-party engineering firms. Recently, the biggest change has been moving away from standing pilot lights to now computerized controls that only ignite the fuel when necessary. This dramatically increases efficiency because the fuel supply is not constantly sucking at that light. It also makes the interior safer from the pilot’s burned carbon monoxide, and reduces the risk that the pilot could light any standing gas from another source.If you’re looking for more tips, Bellevue Furnace Repair has it for you.

These controls are now pretty much standard on all HVAC devices. Water heaters are the only thing which still uses standing pilot lights. Since the base of the furnace is no longer a continuous flame, the manufacturers had to devise a new method for deciding if the furnace is lit. The new system of determining whether the furnace is on is known as flame rectification. It uses an electric flame sensor to ensure gas is not fed into the furnace until there is a heat source to ignite it. The first thing your Denver furnace repair technician can do if there is a issue with these controls is simply to wipe the sensor down to clean it.

There are other safety devices outside of the igniter. A limit switch should be in place which detects if the furnace is operating beyond a certain temperature. This is a shut-off switch so this is a possible reason if your furnace mysteriously shuts off. Hopefully this is just a sensor problem that could easily be fixed. In fact, the furnace usually resets itself automatically several times after shutdown. If the problem of overheating continues to arise, the solid state circuits may shut down the entire system until an HVAC service technician can come in and inspect the system. However, you can not assume this because there are undoubtedly serious problems involving furnace overheat. To do this kind of work, it’s necessary to use a professional and licensed heating company because air handling systems are becoming increasingly complex. Now the average device could have 4 separate security controls that the contractor needs to know about. Just jerry-rigging the system is not a choice for bypassing certain controls.