I have a 2000 Coleman furnace in our trailer house and it is not heating properly. It will come on and not ignite right away, then it fires up and runs a short time and shuts down. I can still hear it trying to ignite again, which it does and cycles for a short time again. It does this for a while but eventually shut off completely and not get the temperature up to what the thermostat is set at.
Any guidance is greatly appreciated!