luxaire furnace pcuhald12n080a short cycling | RIDGID Forum | Plumbing, Woodworking and Power Tools - HVAC Discussion

Hello I have a 1997 luxaire furnace model number pcuhald12n080a . Last year it was short cycling . So I replaced flame rod and limit switch. The switch fixed the problem thank God. However its getting cold now and the short cycling began again. I replaced the filter. Cleaned out the furnace with a shop vac. The indicator blinker light is blinking red. It's not giving me a code. It will blink slowly every 2 seconds continously and doesn't stop. Again it's red. But no actual code. Any ideas??