My Trane XB90 model TUC060C936BA natural gas furnace will run without any apparent problems for its first cycle after being off for a while (several hours/overnight). From my non-expert understanding, the draft inducer comes on, then there is a yellow glow where the flame will soon be, followed by the gas firing and the fan starting. It will then stay on until the thermostat reaches the temperature it is set to. At which point it will rest until the house temp drops enough to be time to start again. All good.
However, once it is time to start again something is going wrong. I think the draft inducer is still starting and will run for a little (less than a minute) and then there is some clicking and the draft inducer stops. It will repeat this process until I give up and turn the thermostat off and wait for a few hours. I don't see any orange or yellow glow, it doesn't fire, and it does give a pressure switch error code. I put a new filter in. While I cannot see inside the exhaust pipe, there is no clog at the end of the pipe and it is screened and has air coming out. There doesn't seem to be any problem in the condensation line either.
Video of the second cycle attempt (not working)