Fix Furnace Pressure Switch

Check for obstructions in the hose.

Fix furnace pressure switch.

Connect the ohm meter to the pressure switch. Watch this and we might be able to get it working again. Please email us anytime if you have a question. With the new pressure switch installed replace the access panel.

In this episode of repair and replace vance shows how to replace the pressure switch which is part of troubleshooting a furnace that won t ignite. Sucking on the pressure switch or leaving a pressure switch attached to furnace when vacuuming out the condensate line will ruin the diaphragm on the pressure switch. While the inducer is running short the wires going to the pressure switch with a jumper. The burners may not burn properly.

If your new pressure switch has a bracket mounted already remove the bracket and switch from the furnace together. Next take off one of the power hoses and blow on it. The ohm meter should read very close to zero. When the system calls for heat and the inducer fan begins to run check each pressure switch terminal.

Be ready to pull the power. If there is no disconnect. Pressure switch replacement be sure to turn off the power to the unit before you begin locate the pressure switch and disconnect the wires and hose from the switch. If you need parts please send me your furnace s product number.

Attach the vacuum tube or tubes and connect the wires. Remove the wires from the pressure switch. First turn the power of the furnace off. To test this recycle the furnace.

The furnace should start. Turn the gas supply back on as well as the power and your furnace should be ready for use. Now use the ohmmeter to check whether the pressure switch is functioning properly. Thread the mounting screw or screws to secure.

Turn off the power. I hope you can find and fix the problem. Inspect the pressure switch hose. If you have found that your pressure switch is not letting your furnace come on.

On a call for heat the inducer should start. Our email address is. Turn off the power to the furnace by switching off the disconnect switch located near the furnace.