Emerson 50A55 - Manuals

www.white-rodgers.com 260 TECHNICAL HELP Place thermostat fan switch in the ON position. Return fan switch to AUTO position. Indoor Blower Check Does indoor blower run at HEAT speed? YES YES NO NO YES NO YES NO YES NO Indoor blower fault. Repair or replace. Check operation. Is 24V present at control...

www.white-rodgers.com 262 TECHNICAL HELP Inducer Draft Motor and Pressure Switch Check Is induced draft motor energized? YES YES NO Is diagnostic LED flashing 3 times? Call for heat. Thermostat contacts R & W close. Jumper pressure switch. Disconnect electric power at fuse or circuit breaker. Is...

www.white-rodgers.com 263 TECHNICAL HELP Main Burner Ignition Check. Inducer ON. Does ignitor warm up and glow? YES YES NO NO Does burner ignite? Turn power OFF to furnace. Unplug ignitor from wire harness. Connect voltmeter across ignitor wiring harness leads from control. Energize system. Turn man...