Responded to no heat call for 22-year-old Goodman furnace. Diagnosed issue with draft motor operating but failing to engage pressure switch for ignition sequence. Temporarily restored operation by tapping pressure switch. Verified draft port and pressure switch port were clear of debris. Identified and secured melting wire that was contacting hot draft motor housing. Noted potential heat exchanger crack but could not confirm with certainty; customer informed of associated risks and opted to schedule consultation for furnace replacement.
