What are the common problems with Lennox furnaces?
Lennox residential heating systems are generally recognized for high energy efficiency ratings and advanced climate control features, but homeowners occasionally encounter specific component failures. Premature heat exchanger cracking is a historically documented concern in certain older models, which poses safety risks and requires immediate professional inspection. Electronic control board malfunctions, faulty flame sensors that fail to detect ignition, and malfunctioning pressure switches can cause the furnace to lock out or blow cold air unexpectedly. Additionally, inducer draft motor failures, worn blower motor bearings causing squealing or humming noises, and clogged condensate traps in high-efficiency condensing furnaces require regular annual tune-ups and preventative maintenance by certified HVAC technicians.
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