Visual Identification Identifying the component visually is straightforward once you know what to look for. It is a small, often rectangular or cylindrical device with an electrical connector plugged into it.
Locating the Pressure Switch on a High-Efficiency Furnace
The pressure switch is a critical component in this system, acting as a guardian that ensures the furnace exhaust system is clear and functioning correctly before allowing the burners to fire. A clogged flue pipe, a cracked heat exchanger, or a failing inducer motor can all cause the switch to trip.
Typical Location on Modern Furnaces On the majority of modern gas furnaces, the pressure switch is situated on the side of the blower compartment. In older units, the pressure switch might be mounted vertically on the combustion chamber or located near the bottom of the unit.
Locating the Pressure Switch on a High-Efficiency Furnace
The tubing is usually clear or black plastic and can sometimes be brittle, so handling the component requires care to avoid cracking the ports. Variations in Older and High-Efficiency Models While the location is generally consistent, the specific configuration can vary depending on the furnace model and age.
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