Nordyne furnace cycling on and off

Discussion in 'HVAC Heating & Cooling' started by Joe S., Feb 1, 2011.

  1. Joe S.

    Joe S. New Member

    Sep 15, 2007
    I have a Nordyne condensing gas furnace that cycles on and off while trying to reach the temperature that I set at the thermostat. For example, when the room temperature is at 62 and I increase the thermostat temperature to 68, the furnace will kick on and then it will turn off after a short while. After a couple of minutes it will kick back on and continue on and off until the room finally reaches the set temperature. The on and off cycling happens at different time intervals - it could be on for 2 minutes, off 2 minutes, on 10 minutes, off 2 minutes. I recently had the flame sensor cleaned, but no change in the cycling. I also change the filters regularly. I have a digital thermostat (White-Rodgers). I don't seem to have this cycling problem in the summer when the air conditioning is running.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    The user manual normally has some troubleshooting steps. While it could be numerous things, it could be something like a sensor overheating, then it shuts down. The flame sensor is a good possibility. There may be some led's that might flash, or have a code that would help direct you.
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