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Heating Unit Short Cycling

Heating Unit Short Cycling - the primary reasons your furnace is short cycling include a bad flame sensor, overheating, dirty filter, oversized furnace, blocked heat grates, blower malfunctioning, defective fan switch limit,. when you sense that your furnace's heating cycles are coming off and on often without your space reaching the set temperature on the thermostat (and there are no other issues), your furnace may be. heat pump short cycling occurs when your system cycles on and off too frequently without reaching the set temperature on your thermostat. Instead of running for an extended period as it should, the system.heat pump short cycling refers to the rapid cycling on and off of your hvac system, where it fails to complete.