HVAC Questions? Ask an HVAC Expert for Answers ASAP
No, not related at least not yet. The code means that the vent motor is running but there is no pressure differential being sensed by the pressure switch. The pressure switch is a device like the one in the photo,
If you remove the 1/4" hoses on this and clean out the barbed fittings that the hose (s) attach to you may get it to work, this device is there to ensure that you exhaust vent is clear before firing the furnace.
Let me know,
You can use anything that has a toothpick shape and won't break off, but you don't want to go past the depth of the barbed fitting when cleaning the pressure switch fittings as there is a diaphragm in there.
Yes , the pressure switch is there to ensure that the unit will not fire without sufficient airflow across the heat exchanger basically it verifies that the vent motor is running and that the exchanger or flue is not blocked, the next step would be to make sure that the flue is not blocked. Can you do that ?
More than likely you are going to need the new pressure switch.
A lot of people use this site .
Thank you very much, Mark. I will order the pressure switch & give it a shot.
The question stays open so reply back when you get it,
Did you need any more information from me regarding the pressure switch? Let me know. Thanks
No just let me know how it goes,
I ordered the new pressure switch, installed it, and am still getting the same response from the furnace diagnostics--"pressure switch open with inducer on." What is likely to be the problem?
It must not be making the vacuum, can you get the combustion air pipe off of your furnace or at least a portion of it , for a test ?
I'll sure try. Which is the combustion air pipe?
It will be the one that just dumps into the combustion chamber, where the exhaust one connects to the inducer assembly.