Coleman-Mach Underbunk AC filter and model service prep

Use this when an Underbunk Coleman-Mach AC owner needs model, filter, ducting, or support notes.

Owner-safe checklist

• Record Underbunk model, part number, thermostat type, filter condition, airflow symptom, duct outlet behavior, and service history.
• Clean only the removable washable filter if it is owner-accessible and the unit is off.
• Stop use for burning odor, repeated breaker trips, water inside the coach, or abnormal noise.
• Use Coleman-Mach support or qualified RV HVAC service for ducting, controls, cooling, parts, or electrical diagnosis.

Official sources

• Coleman-Mach Underbunk Central AC Product Page