What is the Most Important Part of a Furnace?

The heat exchanger is one of the most important components of your furnace or oven as it warms up incoming air before entering your home.

What is the Most Important Part of a Furnace?

The heat exchanger is the most essential element of your heater or oven, as it is the tool that warms the air. Generally, ovens draw in air from outside and the heat exchanger rapidly heats it up before it enters your home. The thermostat can detect the temperature of a room and determine if it is lower than the level you have set. When the temperature is lower than what you have set, the thermostat sends an electrical signal to the burner to turn on. In a gas oven, this is a small flame that always burns a small amount of excess gas.

In an electric oven, the pilot light comes on with an electronic ignition when it's time to turn on the oven. However, if the pilot light is blocked by dirt, the flame will go out. When this happens, turn off the gas (or turn off an electric oven at the switch) and use a small brush to clean the pilot light. In most modern ovens, the pilot light will turn on automatically when power or gas is restored. If the pilot valve is clear but the light still doesn't come back on, ask a professional to check for gas leaks.

In an electric oven, a professional can diagnose if there are any problems with the ignition switch or with the pilot light itself. In a gas oven, the burner is activated by the pilot light. In an electric oven, this is done with an electric ignition. The burner creates heat inside a combustion chamber, which in turn generates heat in the heat exchanger. When this component breaks, it does not heat the air. In some cases, this may mean that the air takes longer than normal to warm up, while in other cases it may not heat up at all.

The air enters the heat exchanger and heats up. The cold air is replaced by the hot air created by the burner. The fan motor then pushes this hot air into a long tube or pipe. The fan motor is a component of the oven that is responsible for pushing hot air through the ducts and out of the ventilation grilles. Usually, these motors are sized according to the size and design of the house they need to heat.

Larger engines are used in homes where air needs to travel long distances. In some cases, more than one ventilation motor is installed as part of a heating system to force air to travel particularly long distances. As this component begins to break down, the oven will continue to produce hot air, but there is a significant temperature difference between the vents located close to the oven and those located farther away. In case of a total breakdown, practically no air will escape through vents located far from the oven. To pass hot air through your house, the fan motor will rotate a belt known as an oven or fan belt.

Like similar straps on your car or vacuum cleaner, these straps will wear out with time. A loud squeak or squeak from the fan motor is usually an indication that you need to replace it. If you can access it easily enough, it's often enough to disconnect power supply, remove old belt with wrench or screwdriver and replace it with new one. However, if you can't access old strap or remove it, call professional. After being pushed through ducts, warm air exits through vents located throughout your home. To facilitate airflow, make sure these vents are dust-free and not blocked by furniture or other items.

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