I have 4 blinks from the light .I have a Trane XB80 it will work fine then after it reaches the stat temp when it goes bac on it blows cool air I watch and sometimes it tries to light and others it doesn't try to light it just blows cool

I have read similar problems here, and have not read a solution. I have a Trane XB80 furnace (5 years old or so), and recently it started acting very flakey: The ignitor glows bright orange for a moment, gas shoots out the tubes for a few seconds (10 at most) then it clicks off and cool air blows....

My tranxb80 turns on and heats up. The room directly above the furnace is warm but the rest of the house is cold. I placed tissues over the vents and there is no air blowing through. What could be the issue?

My trane xb80 gas furnace won't ignite. The glow plug lights up when it tries to come on but it doesn't appear to get any gas at all.

My ignighter is lighting the furnace, however after about 3 seconds the flame turns off then after about 10 seconds it cycles again but just will not stay light. The red light is blinking fast. Not sure what that means. Please help. Js