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What Is A Pressure Switch On A Gas Furnace
What Is A Pressure Switch On A Gas Furnace. What is a furnace pressure switch? This is to ensure the combustion gases are vented.

It is an automatic relay system located near the motor that shuts the furnace down if it detects a negative pressure from the inducer motor. A pressure switch is a safety feature that is designed to automatically shut the furnace off if it senses negative motor pressure. How to fix pressure switch on furnace.
If The Inducer Turns On And Is Working Normally, The Furnace Pressure Switch Should Activate.
A furnace pressure switch is an automatic protection feature located near the motor. It should be located near the blower motor. To reach it, you will need to uninstall the upper access panel.
Pressure Switches Are Normally Located In The Combustion Chamber, Close To The Draft Inducer Fan Motor.
It’s the only part that verifies the absence of dangerous exhaust gases, enabling the furnace to run without exposing you and your loved ones to gas poisoning. If the draft inducer introduces exhaust fumes back into the system, this can lead to backdrafting. A furnace pressure switch is an automatic safety feature located near the motor.
A Gas Furnace Pressure Switch Closes To Allow Current To Pass Through And Start The Ignition Of The Furnace.
What is a furnace pressure switch? The furnace pressure switch is designed to sense the negative pressure created by the draft inducer fan at start up, and if the air pressures and venting are not correct, the switch will shut down ignition. The pressure switch plays a vital safety role.
Backdrafting In A Furnace Can Cause Fires Or Even An Explosion.
The design of the draft pressure switch used in your furnace will depend upon the design of your furnace. Check the tubing from the inducer. Types of draft pressure switches.
What’s A Pressure Switch On A Furnace?
A pressure switch is a safety feature that is designed to automatically shut the furnace off if it senses negative motor pressure. The pressure switch is a normally open switch that closes upon the manufacturer’s specifications for required negative pressure. If the hose is damaged, cracked, or disconnected, then the pressure switch will stay open and your furnace won’t heat up.
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