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Hello, tell me how often in seconds or minutes the cycles are, I need to know if this just started or has always been this way.
Tell me if the furnace is heating the house or not.
See page 13 of this manual, click here please
The furnace is over heating and going off on its high temperature safety cut out, or its flame roll out switch.
We can go from here without a time limit, meantime tell me a lot about your technical skill sets so that I can coach you most effectively.
Thanks, I can't recommend that you fit a jumper across the high limit switch as a brief test only while monitoring the furnace temperature so that the warm air plenum does not get over 190F... but that is what a qualified furnace technician would do... if the jumper seems to solve the problem and the furnace is running cooler than 160F then replace the high limit switch.
The high limit resets when the sensor cools off, some furnaces have a 3 hour timer in them some do not.
Let me know if you have the skill sets needed to locate the high limit switch and jumper the two wires attached to it or not... BUT ONLY FOR THE BRIEF TIME IT TAKES SEE IF THE FURNACE WILL THEN RUN LONGER THAN 90 SECONDS.
Tell me if you would prefer that I do not use the manual and its diagrams for reference, and would prefer a narrative way of coaching without such references, we can go from there.