Lennox International Inc. G43UF manual

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Table of contents for the manual

  • Page 1

    02/04 *2P0204* 504,898M *P504898M* G43UF SERIES Litho U.S.A. 504,898M 02/04 E 2004 Lennox Industries Inc. Dallas, T exas, USA  GAS FURNACE WHA T TO DO IF YOU SMELL GAS: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other ap- pliance. Installation and service must be performed by a qualified ins[...]

  • Page 2

    Page 2 G43UF Parts Identification DURALOK TM HEA T EXCHANGER ASSEMBL Y UPPER ACCESS P ANEL BURNERS BLOWER MOTOR CABINET CONTROL BOX GAS V AL VE AND MANIFOLD COMBUSTION AIR PROVING (PRESSURE) SWITCH COMBUSTION AIR INDUCER BLOWER ACCESS P ANEL FLUE COLLAR TOP CAP INTEGRA TED CONTROL BOARD FIGURE 1 W ARNING Product contains fiberglass wool. Disturbing[...]

  • Page 3

    Page 3 W ARNING Do not use this furnace if any part has been under - water . A flood−damaged furnace is extremely dan - gerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified ser - vice t echnician to inspect t he f urnace a nd to r eplace all g as c ontrols, control system parts, and e lectrical parts t[...]

  • Page 4

    Page 4 The g as v alve on t he G 43UF m ay b e equipped w ith either a gas control knob or gas control lever . Use only your hand t o p ush t he lever o r t urn the g as c ontrol knob. N ever use t ools. If t he the lever will not m ove or the knob w ill not push i n o r t urn b y h and, d o not try to r epair i t. C all a quali - fied service tech[...]

  • Page 5

    Page 5 T ABLE 1 Furnace Filter Size Furnace Cabinet Size Side Return Bottom Return 17−1/2" 16 X 25 X 1 (1) 16 X 25 X 1 (1) 21" 16 X 25 X 1 (1) 20 X 25 X 1 (1) 24−1/2" 16 X 25 X 1 (2) 24 X 25 X 1 (1) Maintenance A qualified service technician should inspect the complete system each season (heating and cooling). The following maint[...]

  • Page 6

    Page 6 Service Reminder Call your Lennox service technician if the unit will not oper- ate. Before calling, always check the following to be sure service is required: 1 − Check that electrical disconnect switches are ON. 2 − Check room thermostat for proper setting. 3 − Replace any blown fuses or reset circuit breakers. 4 − Gas valve should[...]

  • Page 7

    Page 7 Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate −− Example: G43UF−24B−045−2. Cabinet Parts Upper access panel Blower access panel T op Cap Control Panel Parts T ransformer Integrated control bo[...]