CYCLING FURNACE

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CYCLING FURNACE

Home > Discussion Forum > Mechanic's Corner (general)

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All Messages in Thread	Author	Date
CYCLING FURNACE	TROY	3-25-08
I HAVE A HYDRO FLAME 8940DCLP-11. THE UNIT RUNS FOR A WHILE AND THEN SHUTS DOWN. IT WILL DO THIS A FEW TIMES BEFORE GOING IN TO A LOCK OUT STATE. I CAN RESET IT BY TURNING THE STAT DOWN AND THEN BACK UP. IT WILL DO THE SAME THING AGAIN. I HAVE PULLED THE ENTIRE UNIT OUT OF THE TRAILER AND CLEANED THE BURNER AND ELECTRODE/FLAME SENSOR ASSEMBLY. ALL VENTS ARE CLEAR AND OPEN. I HAVE FOUND THAT THE UNIT WILL RUN FINE WHEN THE TRAP DOOR OUTSIDE IS OPEN AND IT CAN GET MORE AIR ACROSS THE HEAT EXCHANGER. WHEN THE DOOR IS CLOSED, IT WILL CYCLE ON A LIMIT. THE TRAILER HAS NOT BEEN MODIFIED IN ANY WAY AND ALL VENTS AND RETURN AIR GRILLE ARE CLEAR. WHAT ARE YOUR RECOMMENDATIONS? WHEN RUNNING THE FLAME APPEARS TO HAVE A PULSE TO IT THAT YOU CAN HEAR AND FEEL AT THE FLUE.
Re: CYCLING FURNACE	Christopher	5-6-08
Thats very strange and it does seem like its choking for air. Have you opened up the thermostat to see if the cycle time is set properly, it could just be set too low and shutting down prematurely...?