How to test your thermostat video
This is a good the gas valve trouble shooting video that explains very well.
How to : check the control board
How to fix the pressure switch valve
10 reasons why a furnace fails to start
10 reasons why furnace is overheating
Look for code for failed limit switch
My friend finds a few more videos, they are very helpful!
This is testing pressure switch
This is testing inducer motor
More on pressure switch
The challenge is that: I bought a new inducer motor and mounted it on, then I find it is broken!! It is so annoying and I have to re-do everything one more time!!
