Gotta love stuff that fixed itself

[Rock]

So I spent today emptying the basement to get to my heater. It had been short cycling for months. Burner shuts down after 10 min, fan runs and 1-2 minutes burner comes back on. Removed heater and all was clean, no dirt, no bugs etc. No local shops do bench test if they do not work right and they do like I did than they replace. So with three weeks of my extended warranty left I put heater back in. Ducting hooked back just like it was and I made sure no kinks before I removed it. It now works fine, ran 90 minutes with no short cycling. Should have left it alone, would have got a new. Pics of my rat nest!!