Furnace - one of the most used appliances at your home, all you want is that furnace must work as should. but what you can do if your furnace starts then stops? First of all, don’t panic. Most common solution for this problem is replacing the pressure switch. The pressure switch closes when the burner has sufficient airflow. If the pressure switch isn’t working, it might not close when the proper airflow is present, causing the ignition process to stall. If the ignition process stalls, the furnace will shut off. in this article you will find simple instructions with replacing pressure switch in Amana dmms90703bxa (and similar models).
Pressure switches are normally located in the combustion chamber, close to the draft inducer fan motor. To reach it, you will need to uninstall the upper access panel. Disconnect the pressure switch wires, along with the vacuum tube or tubes. Next, unthread the mounting screw, or screws, to release the old pressure switch from the draft inducer fan motor housing or bracket. When installing a new pressure switch you should confirm that the pressure rating matches the rating found on the original. Ratings will differ depending on your geographic location. Position the new switch on the fan motor, the housing or the bracket as required. Thread the mounting screw or screws to secure. Attach the vacuum tube or tubes, and connect the wires. With the new pressure switch installed, replace the access panel. Turn the gas supply back on, as well as the power, and your furnace should be ready for use.
Make some tests. After replacing the pressure switch, the furnace must work like a new one. Feel difficulties with replacing? Give us a call and appoint a visit at a convenient time!
