This motor creates negative pressure in the heat exchanger, venting exhaust gases safely out of the home. One tube runs to the inducer motor to sense the pressure, while the other is vented to the outside or to the heat exchanger to compare the actual pressure against a set threshold.
Furnace Pressure Switch Location Guide
Visual Identification Identifying the component visually is straightforward once you know what to look for. Its primary function is to monitor the strength of the draft created by the inducer motor.
The tubing is usually clear or black plastic and can sometimes be brittle, so handling the component requires care to avoid cracking the ports. Furnace Type Typical Pressure Switch Location Number of Tubes Standard Efficiency (80% AFUE) Top or side of the blower compartment Two (Inducer and Venting) High Efficiency (90%+ AFUE) Lower front or side of the unit Three (Inducer, Venting, and Drain) Old/Masonry Furnaces Near the combustion chamber or rear One or Two Common Issues Related to the Switch Because the pressure switch is directly linked to the inducer motor and the venting system, issues often stem from related components rather than the switch itself.
Identifying the Pressure Switch Location by Furnace Type
In older units, the pressure switch might be mounted vertically on the combustion chamber or located near the bottom of the unit. 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.
More About Where is pressure switch on furnace
Looking at Where is pressure switch on furnace from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Where is pressure switch on furnace can make the topic easier to follow by connecting earlier points with a few simple takeaways.
