TROUBLE SHOOTING CHART for qualified serviceman - MAIN BURNER
SYMPTOM | POSSIBLE CAUSES |
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Flame too large | 1. | Defective operator section of gas valve. | 1. | Replace complete valve. |
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| 2. | Burner orifice too large. | 2. | Check with local gas company for proper |
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| orifice size and replace. |
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| 3. | If installed above 2,000 ft. | 3. | Refer to orifice chart on Page 9. |
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Noisy Flame | 1. | Noisy pilot. | 1. | Reduce pilot gas with adjusting screw on combination |
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| gas control valve. |
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| 2. | Burr in orifice (if it whistles or resonates). | 2. | Remove burr or replace orifice (do not enlarge orifices) | . |
| 3. | Excessive gas input. | 3. | See “Flame Too Large” above. |
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Yellow tip flame (some | 1. | Clogged main burner ports. | 1. | Clean main burner ports. (Do not enlarge ports). |
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yellow tipping on LP | 2. | Clogged draft hood. | 2. | Clean draft hood. |
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gas is permissible | 3. | Linted up mixer opening. | 3. | Check for dust or lint at air mixer opening. |
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Floating Flame | 1. | Blocked venting. | 1. | Clean flue passageways to remove blockage. |
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Gas Odor | 1. | Gas leak. | 1. | Shut off gas service immediately. Check piping. |
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| Call gas company. See “For Your Safety”, Page 1. |
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| 2. | Chimney or flue obstruction. | 2. | Clean flue. |
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| 3. | Drafts around appliance. | 3. | Eliminate drafts. |
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Delayed Ignition | 1. | Pilot flame too small. | 1. | Check pilot orifice. Increase pilot gas flow if |
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| necessary by adjusting inlet pressure from gas |
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| source (meter if natural gas or second stage |
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| regulator if propane - maximum 7” w.c. for |
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| Natural and 11” w.c. for propane). |
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| 2. | Burner ports clogged near pilot. | 2. | Clean burner ports (do not enlarge ports). |
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| 3. | Low gas pressure. | 3. | Check gas supply inlet pressure. Check gas outlet |
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| (manifold) pressure for “minimum step” pressure |
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| (for “step” pressure chart see “Operation”). |
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| 4. | Pilot decreases in size when main | 4. | Supply piping inadequately sized or incorrect |
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| burners come on. |
| inlet pressure. |
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| 5. | Drafts around appliance. | 5. | Eliminate drafts. |
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| 6. | Bad venting. | 6. | See “Venting”. |
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Failure to Ignite | 1. | Main gas off. | 1. | Open all manual gas valves. |
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| 2. | Defective gas valve. | 2. | Replace gas valve. |
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Condensation of | 1. | Improper venting. | 1. | See “Venting”. |
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Water Vapor |
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Burner won’t | 1. | Defective or sticking automatic valve. | 1. | Replace valve. |
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turn off | 2. | Excessive gas pressure (The supply gas | 2. | To correct this situation contact the utility |
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| pressure must not exceed 1/2 psi or |
| supplying the gas. |
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| 14” w.c. |
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Incorrect Gas Input | 1. | Gas input not checked. | 1. |
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| 2. | Clogged orifice. | 2. | Check orifice for clogging. If clogged, clean out |
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| the hole carefully with a smooth wood toothpick. |
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| (Do not in any way enlarge or distort it). |
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Not enough heat | 1. | Appliance undersized. | 1. | This is especially true when a dwelling or room is |
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| enlarged. Have the heat loss calculated and compare |
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| to the appliance output (approx. 70% of input). |
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| Your gas company or installer can supply you with |
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| this information. If appliance is undersized, replace |
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| with correct size unit. |
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| 2. | Incorrect supply pressure. | 2. | Check supply pressure as outlined above. |
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Too much heat | 1. | Combination control valve sticks open. | 1. | Replace combination control valve. |
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TROUBLE SHOOTING CHART - PILOT AND VALVE |
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Burner won’t | 1. | Gas valve not turned on. | 1. | Turn gas valve to “on” position”. |
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turn on | 2. | No voltage to valve. | 2. | Check for 24 Volts to Valve. |
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| 3. | Defective thermostat. | 3. | Check wall thermostat. |
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| 4. | No 115 Volt Line Voltage. | 4. | Jump fan switch to check for voltage (fan will |
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| come on). |
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| 5. | Auxiliary limit switch open. | 5. | Push on red buton to close. |
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| 6. | Blocked flue switch open. | 6. | Push red button in to close. |
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| 7. | Gas valve defective. | 7. | Replace gas valve |
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