Furnace Installation and Owners Manual
22
LDJ620_E01_R03_2006.03
Models LDJ620-9 and LDJ620-10
Inefficient Operation and/or Operating Too Hot
Loses fire when
weather warms up or
won’t stay lit in low fire
mode
Too much time between idle cycles
(indicated by corn burned down into
the pot).
Try changing timer — if set at 2 & 10,
change to 2 & 8 (experimentation may
be necessary).
Not enough time between idle cycles
(indicated by fire pushing out the top).
Try changing timer — if set at 2 & 6,
change to 2 & 7 (experimentation may
be necessary).
Problem
Explanation
What to do
Burns too hot / runs
out of corn
Excessive draft will pull too much air
through the burn chamber, causing the fire
to burn faster than the corn can be sup-
plied.
Chimney draft should never exceed
0.04 inches water column draft. Verify
correct installation; install second
barometric regulator if necessary
(refer to “Barometric Draft Control
Information” on page 36).
Furnace keeps open-
ing high limit switch
and/or is not blowing
much heat through
the vents
Filter dirty and restricted.
Replace filter.
Not enough plenum or ductwork area —
the hot air or return air connections have
been reduced.
Maintain 196 square inches of con-
nection area for the hot air and return
air.
Loses fire when
weather warms up or
won’t stay lit in low fire
mode
Too much time between idle cycles
(indicated by corn burned down into
the pot).
Try changing timer — if set at 2 & 10,
change to 2 & 8 (experimentation may
be necessary).
Not enough time between idle cycles
(indicated by fire pushing out the top).
Try changing timer — if set at 2 & 6,
change to 2 & 7 (experimentation may
be necessary).
Problem
Explanation
What to do
