What is NOT a common cause for the burners of a gas furnace to short cycle?

The reason why fan control contacts stuck closed is not a common cause for the burners of a gas furnace to short cycle lies in the function and operation of the furnace components. Short cycling refers to the condition where the furnace turns on and off frequently and does not run long enough to effectively heat the space.

High room temperatures typically lead to the thermostat signaling the furnace to shut off, contributing to short cycling. Dirty burner orifices can restrict gas flow, leading to inefficiencies and improper combustion, thus potentially causing the furnace to short cycle as well. An inadequate gas supply can cause the furnace to become insufficient for heating, leading it to cycle more frequently without achieving the desired temperature.

On the other hand, if fan control contacts are stuck closed, the fan would continue to run, providing airflow regardless of the furnace's heating cycle. This condition would generally help maintain more consistent temperatures, preventing the furnace from short cycling as it continues to operate until there is sufficient heat. Therefore, fan control contacts being stuck closed would not typically cause the burners to short cycle, making this the correct response to the question.