Locate the unit's disconnect switch near the unit itself and ensure it is also turned off. This prevents the furnace from running with blocked vents or a failing blower, which could lead to dangerous carbon monoxide buildup.
How to Replace a Furnace Pressure Switch Step by Step
First, disconnect the two wires connected to the switch terminals. Before you begin, you must turn off the power to the furnace at the circuit breaker.
Check the tubing for cracks, holes, or disconnections, as a leak here is a common cause of false pressure switch failures. Also, examine the venting outside your home to ensure it is not clogged with snow, leaves, or bird nests, which can create excessive backpressure.
Step-by-Step Guide to Replacing a Furnace Pressure Switch
Understanding the Furnace Pressure Switch The furnace pressure switch is a safety device installed between the inducer motor and the heat exchanger. This small, often overlooked component acts as a guardian, verifying that the inducer fan is creating sufficient airflow to clear combustion gases.
More About How to check a furnace pressure switch
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More perspective on How to check a furnace pressure switch can make the topic easier to follow by connecting earlier points with a few simple takeaways.
