My fan and gas shuts off after only a few minutes in the heating cycle and restarts again shortly, only to shut off again... and so on. I think it's the fan limit switch but don't know if I should replace it or try adjusting the limit. Any advice??

My fan and gas shuts off after only a few minutes in the heating cycle and restarts again shortly, only to shut off again....and so on. I think it's the fan limit switch but don't know if I should replace it or try adjusting the limit. Any advice???
Hello,,
This was happening to me on my carrier furnace, and also it would not even start the blower, my problem was a bad motherboard after the heating contractor replaced some sensors and switches, hope this helps

Dirty flame sensor, overheating? Could be something else.