Have HVAC Questions? Ask an HVAC Expert for Answers
Hello, sorry about the wait. I have just been notified of your question.
The problem is most likely (95% chance) that the furnace is not going off on the thermostat as one would expect but instead is tripping its high temperature safety cut out switch...and by turning the power OFF then back on you are executing a 'soft reset'
Make sure your air filter is clean, and none of the vents blocked, if that does not solve the problem replace the furnaces high temperature cut out switch.
If you want to do that yourself let me know, I will need a few photo's in order to coach you.
We can go from there.