United States Stove A9740N, G9740L, C9740N, G9740N, A9740L, C9740L manual Troubleshooting

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TROUBLESHOOTING, CONTINUED...

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

ODS/Pilot lights, but flame goes out

Thermocouple connection loose at

Hand tighten until snug, then

When control knob is released.

control valve.

tighten 1/4 turn more.

(continued from page 17)

Pilot flame not touching thermocouple,

Contact local gas company.

 

which allows thermocouple to cool,

 

 

causing pilot flame to go out. This

 

 

problem could be caused by either

 

 

low gas pressure, or a dirty or partially

 

 

clogged ODS/pilot.

 

 

Thermocouple damaged.

Replace thermocouple.

 

Control valve damaged.

Replace control valve.

 

 

 

One or both burner do not

Burner orifice is clogged.

Clean burner or replace burner

light after ODS/pilot is lit.

Burner orifice diameter is too small.

orifice.

 

Replace burner orifice.

 

Inlet gas pressure is too low.

Contact qualified service person.

 

 

 

Burner backfires during

Manifold pressure is too low.

Contact local gas company.

combustion.

Burner orifice is clogged.

Clean burner or replace burner

 

 

orifice.

 

 

 

Slight smoke or odor during

Burner orifice is clogged or damaged.

Clean burner or replace burner

initial operation.

Burner is damaged.

orifice.

 

Replace burner.

 

Gas regulator defective.

Replace gas regulator.

 

 

 

Logs appear to smoke after

Vapors from paint or curing process

Problem will stop after a few hours

initial operation.

of logs.

of operation. Run the heater with

 

 

the damper open if you have one,

 

 

or open a window for the first few

 

 

hours.

 

 

Log heater is intended to be

 

 

smokeless. Turn OFF heater and

 

 

call qualified service person.

 

 

 

Heater produces a whistling

Turning control knob to HIGH (3)

Turn control knob to LOW (2)

noise when burner is lit.

position when burner is cold.

position and let warm up for a

 

Air in gas line.

minute.

 

Operate burner until air is removed

 

 

from line. Have gas line checked

 

Dirty or partially clogged burner

by local gas company.

 

Clean burner or replace burner

 

orifice.

orifice.

 

 

 

No gas to pilot.

LP-regulator shut down due to inlet

Verify LP tank regulator is

 

pressure too high.

installed and set to 11" to 13"w.c.

 

 

Replace regulator on heater.

 

 

 

WARNING

If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may backfire when lit. If the gas quality or pressure is low, contact your local gas supplier immediately.

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Contents United States Stove Company Table of Contents Important Safety Information Explosion or carbon monoxide poisoningProduct Features FeaturesContents Items Required for Installation Items Required for InstallationCodes Adequate Combustion and Ventilation AIRInstallation Minimum ClearancesGAS Connection Gas ConnectionGAS Pressure Check Rear View of 9740 Vent-Free Gas HeaterLOG Assembly Proper Installation SequenceRemoving Front Screen LOG PositioningFor Your Safety Read Before Lighting For Your SafetyOperating Instructions What to do if YOU Smell GASLighting Instructions Turn OFF GAS to AppliancePilot Flame Match Lighting InstructionsChecking Flame Appearance Flames Cleaning / ServicingFlame Appearance Heater Assembly Replacement Parts Parts List for Heater Assembly KEY Description QTYBurner & LOG Assembly Parts List for GAS LOG Assembly Troubleshooting Observed Problem Possible Cause RemedyTroubleshooting Optional F40 Blower KIT Page Limited Warranty Policy HOW to Order Repair Parts or Options United States Stove Company