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Symptom
7. Main burner will not stay on.
8. Abnormal operation.
9. Noisy blower.
10. Blower does not run.
Troubleshooting
Possible Causes
A. Blockage in vent pipe.
B. Vent to short.
C. Restriction in vent system caused by offsets.
D. Incorrect vent pipe.
E. Loose connections on the vent safety wiring
harness.
A. Delayed ignition - pilot flame may be too low.
B. Expansion noise, ticking.
C. Combustible gas spillage.
D. Excessive flame roll-out.
E. Burner is over-fired.
F. Yellow burner flame.
G. Yellow pilot flame.
A. Housing rattling.
B. Blower dirty.
C. Blower wheel bent.
A. Fan switch not set.
B. Check bearings.
Checks vent pipe for blockage, such as bird
nests, twigs, leaves, etc.
Check that the vent cap is properly installed,
and not placed to far down on the vent pipe.
Cap must be the same manufacturer as the
vent.
The vent should terminate a minimum of 12 feet
above floor plate. The top of the vent must be
at least 2 feet above any obstacle within a 10
foot radius, including the roof.
All type "B" vents shall extend in a vertical
direction with offsets not exceeding 45 degrees.
Any angle greater than 45 degrees from vertical
is considered horizontal. Any offsets used
should be as far above the drafthood as
possible to allow venting to begin before any
restriction is encountered. The use of too many
offsets may also prevent proper venting.
Use listed B/W type vent pipe. DO NOT use
transite or any other type of ceramic pipe for
venting. DO NOT use single wall pipe. When
venting into a masonry chimney, the chimney
must be properly lined and sized for this gas
furnace. The use of type "B" or flexible chimney
liner is recommended.
Check the connection on both the switch and
the gas valve. Tighten if necessary.
Adjust pilot flame. Refer to "How to Care for
Your Heater" section in this manual.
Heater may be distorted by being vented
through an uneven opening. A restricted vent
may create expansion noise. Refer to "Venting"
section of this manual.
Check vent system for a blocked flue, excessive
down draft (wind) or negative pressure in room
caused by ventilating fan or a fire in a fireplace.
Furnace is possibly overrated - check for high
gas pressure at gas valve (see 4B).
Check the manifold gas pressure. Check the
rate, this appliance is manufactured for
elevations up to 4,500 feet. It must be derated
for operation above 4,500 feet.
Check burner for obstructions. Install new
burner and pilot orifices.
Remove pilot orifice, check and clean.
Tighten blower screws.
Clean blower wheel.
Straighten or replace.
Select fan speed.
Add oil as outlined in "Blower Accessory
Instructions".
13
Corrective Action
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