BGU07516A FOUR FLASHING LIGHTS
Posted: Sat Oct 30, 2010 11:22 am
Issues with furnace running short cycles, blower runs constantly through entire process.
Process
Solid green light
Burners ignite
Runs for approx 3 mins.
Burners shut off
Four flashing green lights (limit switch)
Blower continues for approx one min.
Green light returns solid
Burners ignite
Runs for approx 3 mins
Repeats process
So, as far I can tell something it tripping the limit switch. I assume the switch is good because it resets and allows to run again. I believe it automatically resets but I can't be sure that is what its doing since I am not experienced at this. I also cannot locate where the switch is to manually reset, nor do I know what it looks like. I vacuumed and blew out entire furnace unit, replaced filter. It is still running and heating, just not like it should.
Any thoughts on what else I should clean or check before calling tech?
thanks
stew
Process
Solid green light
Burners ignite
Runs for approx 3 mins.
Burners shut off
Four flashing green lights (limit switch)
Blower continues for approx one min.
Green light returns solid
Burners ignite
Runs for approx 3 mins
Repeats process
So, as far I can tell something it tripping the limit switch. I assume the switch is good because it resets and allows to run again. I believe it automatically resets but I can't be sure that is what its doing since I am not experienced at this. I also cannot locate where the switch is to manually reset, nor do I know what it looks like. I vacuumed and blew out entire furnace unit, replaced filter. It is still running and heating, just not like it should.
Any thoughts on what else I should clean or check before calling tech?
thanks
stew