How To: Furnace Pressure

HOW TO TEST A PRESSURE SWITCH ON A TRANE FURNACE

Click here to determine at what negative pressure the switch will close in order to perform diagnostic testing of the vent pressure switch circuit.

HOW TO SET GAS PRESSURE ON A MODULATING TRANE FURNACE

Click here to learn the process for setting the gas valve on Trane’s modulating furnace, for both the TUHM and the AUHM furnace platforms.

S9 FURNACE – E3.4 HIGH STAGE PRESSURE SWITCH ERROR TROUBLESHOOTING

Click here to gain an understanding of pressure switch characteristics, how to check for proper switch operation and common issues as to why a switch may not close to allow high stage operation.