Gas Pressure Switch Furnace

Your pressure switch is designed to guard against dangerous gas leaks and prevent furnace cycling in the event of a mechanical failure.

Gas pressure switch furnace.

Be sure to turn off the power to the unit before you. Pressure switches are used to stop the furnace from operating in an unsafe condition. More buying choices 23 19 2 used new offers rheem furnace vent air pressure switch replacement for part 42 24387 02 0 40 wc. The importance of a pressure switch.

This improves the safety of your home and prevents ongoing furnace damage. The switch is there to prevent the furnace from running unless the correct venting air pressure is present. 5 0 out of 5 stars 1. A gas furnace pressure switch closes to allow current to pass through and start the ignition of the furnace.

Types of pressure switches the design and number of pressure switches your furnace has depends on whether it uses conventional or condensing technology. Nordyne gas furnace vent air pressure switch replacement for part 632453. On newer furnaces on a call for heat the ifc checks the pressure switch. The board first checks the switch to ensure it is open prior to inducer call.

A furnace pressure switch is a safety device located near the draft inducer motor of a gas forced air furnace. Explanation of a how air pressure switches operate in gas furnaces and water heaters. If is in the closed position the furnace stops the sequence and goes into lockout mode until the switch is open. Here is a quick breakdown of the steps involved in replacing a gas furnace pressure switch once you have sourced your new part.

If it is closed prior to call it will go into fault because the switch is clearly jumpered the circuit shorted or the switch failed closed. If the pressure switch is stuck it does not send enough power to the inducer and therefore the ignition sequence does not begin. The pressure switch also guards against gas leaks and prevents the furnace from cycling if there s a mechanical failure. As noted above the pressure switches used for gas furnaces are almost always normally open.