Model: GPG13360901AC When the thermostat turns the heat on, the induced draft blower turned on, but nothing else happened. The LED was flashing two times indicating... "Pressure Switch Stuck Open". I messed with the hose a little (connected to the pressure switch), and that did nothing. I then flicked the pressure switch a few times with my finger, and it magically started working. Is this an indication of a faulty pressure switch... or is there something else I should/could look into? Since then, it's been working - turning on/off 3-4 times. But I'd like to make sure the problem is absolutely fixed. Any help would be greatly appreciated.

Heating & Cooling - Goodman Manufacturing - Goodman GPG1336090M41 13 SEER Packaged Furnace and Air...