We have an 11 year old Carrier Model 58GFA funace with problems. When the furnace turns on, only the inducer motor runs. We connected a wire to bypass the pressure switch (bad idea) and the gas valve opens and the burners light; however, they are noisier and the touch the top of the hole leading into the heat exchanger. When the blower fan turns on, the flames turn orange like dust is blowing on them. If you open the blower door slightly, the flames go into the heat exchanger as they should. Also, if you remove the filter, the flames turn orange. Also, the fusible link had to be replaced and the draft safeguard switch trips occasionally. Finally, the flue pipe is not as hot as usual and sometimes the pilot light goes out. We recently replaced the inducer motor. I don't know how much (if any) of this is related. Any help would be appriciated. Thanks.