Furnace will not run complete cycle ,several clicks and the and the furnace shutdown and restarts, will not bring the house to temperature
If it's a 90%+ gas furnace, check the combustion air pvc pipe for blockage, if not enough air for proper combustion, control board will shut down the flame to keep from burning poorly! Check your air filter, there's an overtemperature safety switch in the heat exchanger to protect the furnace/ your house, and low airflow will cause the heat exchanger to overheat. Finally, check to see if the flames actually ignite, if no flame, the controller will reset and try again, then if no flame, the controller will reset and try again, then if no flame, the controller will reset and try again, then if no flame, the controller will reset and try again.... get the idea? :) If this is the case, check my other solutions, I just answered someone elses question about non ignition. Hope this helps.
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