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TROUBLE SHOOTING CHART for qualified serviceman - MAIN BURNER
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
Flame too large 1. Defective operator section of gas valve. 1. Replace complete valve.
2. Burner orifice too large. 2. Check with local gas company for proper
orifice size and replace.
3. If installed above 2,000 ft. 3. Refer to orifice chart, Page 3.
Flame pops back 1. Too much primary air. 1. Adjust air shutter. (See Page 12).
Noisy Flame 1. Too much primary air. 1. Adjust air shutter. (See Page 12).
2. Noisy pilot. 2. Reduce pilot gas with adjusting screw on
combination gas control valve.
3. Burr in orifice (if it whistles or resonates). 3. Remove burr or replace orifice (Do not enlarge orifices).
4. Excessibe gas input. 4. See “Flame Too Large” above.
Yellow tip flame 1. Too little primary air. 1. Adjust air shutter. (See Page 12).
(some yellow tipping 2. Clogged main burner ports. 2. Clean main burner ports. (Do not enlarge ports).
on L.P. gas is 3. Clogged draft hood. 3. Clean draft hood.
permissible) 4. Linted up air shutter. 4. Check for dust or lint at air mixer opening and
around the shutter. Clean as necessary.
Floating Flame 1. Blocked venting. 1. Clean flue passageways to remove blockage.
2. Insufficient primary air. 2. Adjust air shutter to increase primary air supply.
(See Page 12).
Gas Odor 1. Gas leak. 1. Shut off gas service immediately. Check
piping. Call gas company. (See Page 1).
2. Chimney or flue obstruction. 2. Clean flue.
3. Drafts around appliance. 3. Eliminate drafts.
Delayed Ignition 1. Pilot flame too small. 1. Check pilot orifice, increase pilot gas flow
if necessary by adjusting inlet pressure.
2. Burner ports clogged near pilot. 2. Clean burner ports (Do not enlarge ports).
3. Low gas pressure. 3. Check gas supply pressure.
4. Pilot decreases in size when main burners 4. Supply piping is inadequately sized. Consult local
come on. gas utility or competent installer.
5. Air shutter open too far. 5. Close air shutter to proper setting as outlined in these
instructions (slight yellow tipping is allowable on
L.P. Gas). (See Page 12).
6. Drafts around appliance. 6. Eliminate drafts.
7. Bad venting. 7. See “Venting”.
Failure to Ignite 1. Main gas off. 1. Open all manual gas valves.
2. Defective gas valve. 2. Replace gas valve.
Condensation of 1. Improper venting. 1. See “Venting”.
water vapor
Burner won’t 1. Defective or sticking automatic valve. 1. Clean or replace valve.
turn off 2. Excessive gas pressure (The supply gas 2. To correct this situation contact the utility
pressure must not exceed 1/2 psi or 14” supplying the gas.
water column).
Incorrect gas input 1. Gas input not checked. 1. Re-check gas input.
2. Clogged orifice. 2. Check orifice for clogging. If clogged,
clean out the hole carefully with a smooth wood toothpick.
(Do not in any way enlarge or distort it).
Not enough heat 1. Appliance undersized. 1. This is especially true when a dwelling or room is
enlarged. Have the heat loss calculated and compare
to the appliance output (70% of input). Your gas
company or installer can supply you with this
information. If appliance is undersized, replace with
correct size unit.
2. Temperature dial set too low. (Bulb 2. Raise setting of Temperature Dial. See
type valves). “Lighting and Shutting Down Instructions”.
3. Incorrect supply pressure. 3. Check supply pressure as outlined above.
Too much heat 1. Temperature dial set too high. 1. Lower setting of temperature dial. See “Lighting
and Shutting Down Instructions”.
2. Combination control valve sticks open. 2. Replace combination control valve.
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