Responded to no heat complaint for a 16-year-old Lennox 80% efficiency furnace. Upon arrival, system was maintaining 63°F with intermittent heating issues. Performed comprehensive inspection including filter check, amp draw verification, pressure switch port cleaning, and ignition testing. System functioned properly during multiple test cycles, raising temperature to 68°F during service visit. Identified potential intermittent issue requiring further monitoring. Recommended comfort advisor consultation due to system age.
