20107341BLUE FLAME PROPANE/LP GAS HEATERFAN KITS - UH1000FB ANDUHS1000FBFor all models. Provides better heat distri-bution. Makes heater more efficient. Com-plete installation and operating instructionsincluded.Manually-controlled - UH1000FB. IncludesON/OFF switch.Thermostatically-controlled - UHS1000FB.Includes three settings: ON/OFF/AUTO.ACCESSORIESPurchase these heater accessories from yourlocal dealer. If they can not supply theseaccessories, either contact your nearest PartsCentral or call DESA International’s PartsDepartment at 1-800-972-7879 for referralinformation. You can also write to the ad-dress listed on the back page of this manual.EQUIPMENT SHUTOFFVALVE - GA5010For all models. Equipment shutoff valve with1/8" NPT tap.TECHNICALSERVICEYou may have further questions about in-stallation, operation, or troubleshooting. Ifso, contact DESA International’s TechnicalService Department at 1-800-323-5190.You can also visit DESA International’stechnical service web site atwww.desatech.com.SERVICE HINTSWhen Gas Pressure Is Too Low• pilot will not stay lit• burner will have delayed ignition• heater will not produce specified heat• propane/LP gas supply may be lowWhen Gas Quality Is Bad• pilot will not stay lit• burner will produce flames and soot• heater will backfire when litYou may feel your gas pressure is too low orgas quality is bad. If so, contact your localpropane/LP gas supplier.SERVICEPUBLICATIONSYou can purchase service manual from theaddress listed on the back page of thismanual. Send a check for $5.00 payable toDESA International.REPLACEMENTPARTSNote: Use only original replacement parts.This will protect your warranty coverage forparts replaced under warranty.PARTS UNDER WARRANTYContact authorized dealers of this product.If they can’t supply original replacementpart(s), call DESA International’s Techni-cal Service Department at 1-800-323-5190.When calling DESA International, have ready• your name• your address• model and serial numbers of your heater• how heater was malfunctioning• type of gas used (propane/LP or natural gas)• purchase dateUsually, we will ask you to return the defec-tive part to the factory.PARTS NOT UNDERWARRANTYContact authorized dealers of this product. Ifthey can’t supply original replacement part(s),call DESA International’s Parts Departmentat 1-800-972-7879 for referral information.When calling DESA International, have ready• model number of your heater• the replacement part number