20107063UNVENTED NATURAL GAS FIREPLACELFP33NRAOBSERVED PROBLEMBurner does not light after ODS/pilot is litDelayed ignition burnerBurner backfiring during combustionSlight smoke or odor during initial operationMoisture/condensation noticed on windowsHeater produces a whistling noise whenburner is litWhite powder residue forming within burnerbox or on adjacent walls or furnitureRemote does not functionREMEDY1. Clean burner (see Cleaning and Mainte-nance, page 18) or replace burner orifice2. Contact local natural gas company3. Replace burner orifice4. Reconnect leads (see Wiring Diagram,page 22)5. Replace battery in transmitter and re-ceiver1. Contact local natural gas company2. Clean burner (see Cleaning and Mainte-nance, page 18) or replace burner orifice1. Clean burner (see Cleaning and Mainte-nance, page 18) or replace burner orifice2. Replace damaged burner3. Replace gas control1. Check burner for dirt and debris. Iffound, clean burner (see Cleaning andMaintenance, page 18)2. Replace gas control3. Problem will stop after a few hours ofoperation1. Refer to Air for Combustion and Venti-lation requirements (page 4)1. Turn control knob to LO position andlet warm up for a minute2. Operate burner until air is removed fromline. Have gas line checked by localnatural gas company3. Observe minimum installation clear-ances (see pages 8 through 10)4. Clean burner (see Cleaning and Mainte-nance, page 18) or replace burner orifice1. Turn heater off when using furniturepolish, wax, carpet cleaners, or similarproducts.1. Replace 9-volt batteries in receiver andremote controlTROUBLESHOOTINGContinuedPOSSIBLE CAUSE1. Burner orifice clogged2. Inlet gas pressure is too low3. Burner orifice diameter is too small4. Thermopile leads disconnected or im-properly connected5. Burners will not come on in remote po-sition1. Manifold pressure is too low2. Burner orifice clogged1. Burner orifice is clogged or damaged2. Damaged burner3. Gas regulator defective1. Not enough air2. Gas regulator defective3. Residues from manufacturing processesand logs curing1. Not enough combustion/ventilation air1. Turning control knob to HI positionwhen burner is cold2. Air in gas line3. Air passageways on heater blocked4. Dirty or partially clogged burner orifice1. When heated, vapors from furniture pol-ish, wax, carpet cleaners, etc. turn intowhite powder residue1. Battery is not installed. Battery poweris lowwww.desatech.com