Printable North Texas AC maintenance calendar

Plan around North Texas operating conditions

DFW's 1991–2020 climate normals include roughly 2,824 annual cooling degree days, normal July and August highs near 96°F, about 20 days per year at or above 100°F, substantial rainfall and thunderstorm activity, and about 29 freezing nights. These are regional planning facts, not a forecast for a particular house. Combined with federal pre-season guidance, they support an early-spring cooling check, regular inspection during heavy runtime, a visual-only post-storm check, and a fall review that distinguishes heat pumps from furnaces.

Sources: [nws-dfw], [energy-star-maintenance]

Set up the annual record before maintenance begins

Record each indoor unit, outdoor unit, furnace, thermostat, filter cabinet, accessory, and zone-panel model. Save the equipment manuals, filter size and type, installer information, warranty registration, previous service findings, and any permit or commissioning records. Mark whether the outdoor unit is an air conditioner or heat pump because winter instructions differ. A generic checklist never overrides model-specific safety, clearance, filter, drain, or cleaning instructions.

• □ Equipment models and serials: __________________________________
• □ Thermostat/control and filter size: ____________________________
• □ Cooling and heating system type: ______________________________
• □ Warranty and last professional service: _______________________

Sources: [doe-maintenance]

Monthly during heavy cooling

Choose one reminder date each month during sustained cooling use. Keep the work outside closed equipment and note changes rather than guessing at a diagnosis. More frequent inspection can be reasonable during renovation, heavy dust, long runtime, or pet shedding. A clean-looking filter doesn't prove airflow is correct, and a dirty filter may be a symptom of conditions that require attention rather than a reason to force a higher-resistance replacement into the cabinet.

• □ Inspect the safely accessible filter; clean or replace only as the equipment and filter instructions direct
• □ Confirm supply registers and return grilles are open, clean, and unobstructed
• □ Compare thermostat setting, room temperature, runtime, and unusual room-to-room differences
• □ Look from a safe distance for water, ice, damaged insulation, vibration, odor, or new noise
• □ Remove loose leaves and debris around the closed outdoor cabinet; maintain the equipment manufacturer's required clearance
• □ Record indoor humidity or moisture concerns without treating one reading as a diagnosis

Sources: [doe-maintenance], [epa-air-cleaners]

Spring professional cooling check

Schedule before sustained summer demand when practical. Ask what the visit includes and which readings will appear on the service record. ENERGY STAR's checklist includes thermostat operation, electrical connections and motor measurements, controls, condensate drainage, coils, refrigerant, and blower airflow. The exact procedure depends on the equipment and conditions. Refrigerant work that could release refrigerant is subject to EPA Section 608 certification requirements.

• □ Thermostat, staging, zoning, and control sequence
• □ Electrical connections, voltage/current findings, motors, and safety controls
• □ Indoor and outdoor coil condition and approved cleaning scope
• □ Condensate drain, pan, pump, trap/vent, and overflow protection
• □ Refrigerant-circuit performance and leak evaluation when indicated
• □ Blower, filter, ducts, total external static pressure, and airflow findings
• □ Written measurements, diagnosis, authorization, corrections, and startup result

Sources: [energy-star-maintenance], [doe-maintenance], [epa-608]

After a significant storm or site change

After hail, wind, heavy rain, nearby construction, landscaping, or roof work, perform a visual check without opening equipment. Look for displaced debris, blocked airflow, cabinet damage, standing water, damaged visible insulation, or a new sound. Don't touch a wet disconnect, climb onto an unsafe roof, enter a hazardous attic, straighten coil fins, pressure-wash the unit, or test energized parts. If water reaches electrical equipment or the system repeatedly trips protection, keep away and call for qualified help.

• □ Outdoor access and airflow remain clear
• □ No visible impact damage, loose panels, standing water, or damaged conduit
• □ Indoor ceilings, drain terminations, pans, and accessible areas show no new water
• □ New vibration, odor, sound, or breaker behavior is documented for service

Sources: [nws-dfw], [doe-maintenance], [cpsc-storm-safety]

Fall heating and safety check

The fall scope depends on whether the home uses a gas furnace, heat pump, electric heat, or dual fuel. Confirm thermostat heating operation, filter and airflow plan, controls, and safe startup before cold weather. Never cover an operating heat-pump outdoor unit because it must exchange heat with outdoor air. Combustion, gas, venting, heat-exchanger, high-voltage, and internal equipment checks belong to qualified professionals. Test smoke and carbon-monoxide alarms only according to their manufacturer instructions and replacement dates.

• □ Identify furnace, heat pump, electric heat, or dual-fuel configuration
• □ Confirm the heat-pump outdoor unit remains clear and uncovered
• □ Schedule qualified combustion, gas, venting, safety, and heat-exchanger checks when applicable
• □ Confirm thermostat stages, auxiliary/emergency heat, and dual-fuel sequence where applicable
• □ Record alarm test and replacement dates under the alarm manufacturer instructions

Sources: [doe-maintenance], [energy-star-maintenance]

Choose filters by compatibility, not the highest number on the shelf

Federal and ENERGY STAR guidance advises regular filter attention because restricted airflow can reduce performance and contribute to coil problems. EPA recommends MERV 13, or the highest efficiency the system fan and filter slot can accommodate. That qualification matters: a deeper or more restrictive filter can create pressure and airflow problems when the cabinet, return path, or blower isn't designed for it. Ask for the filter model, dimensions, replacement condition, pressure impact, and whether a cabinet or return-air change is needed before making a major efficiency jump.

Sources: [doe-maintenance], [epa-air-cleaners]

Track condensate and humidity without making a mold diagnosis

Cooling systems can produce substantial condensate. Watch accessible drain terminations, pans, pumps, ceilings, and nearby surfaces for new water or staining. EPA recommends keeping indoor relative humidity below 60 percent and ideally around 30 to 50 percent when practical, but one reading doesn't identify the cause. Persistent moisture can involve drainage, airflow, equipment capacity, controls, ducts, envelope leakage, or weather. Don't mix drain chemicals or prescribe bleach, vinegar, pressure, or vacuum methods without the exact equipment and drain instructions.

• □ Drain and pan observation: _____________________________________
• □ Indoor humidity pattern and instrument used: ___________________
• □ Wet material dried or professionally addressed promptly: ______
• □ Repeated blockage, pump failure, overflow, or ceiling water escalated

Sources: [doe-maintenance], [epa-moisture]

Use comfort and duct symptoms to request evidence

Rooms that remain difficult to condition, visible damaged or disconnected ducts, long runtime, dust from leaky pathways, or changing utility use can justify duct and airflow evaluation. ENERGY STAR notes that duct leakage is common nationally, but its national percentage isn't a finding about a specific DFW home. Ask the technician to document observed conditions, total external static pressure, filter pressure, airflow or an approved verification method, leakage testing when appropriate, and the connection between measurements and the proposed correction.

Sources: [energy-star-ducts], [energy-star-maintenance]

Close every service visit with a written record

A useful invoice or maintenance record identifies the equipment serviced, complaints and observations, measurements taken, maintenance performed, defects found, recommended corrections, declined work, startup result, warranty implications, and next action. Separate maintenance from diagnosis and repair authorization. If a part or major correction is proposed, ask what evidence confirms it, what alternatives were ruled out, what the complete scope includes, and whether another visit or permit is required. Before hiring HVAC work, use TDLR records to verify the responsible Air Conditioning and Refrigeration contractor's active license, license class and endorsements, and association with the business named on the proposal. Confirm applicable local permit requirements separately.

• Spring service date/readings: ___________________________________
• Fall service date/readings: _____________________________________
• Repairs, warranties, permits, and approvals: _____________________
• Filter changes and observed condition: ___________________________
• Next reminder and unresolved issue: _____________________________

Sources: [tdlr], [energy-star-maintenance]

Know when maintenance becomes repair or replacement planning

Age alone doesn't condemn equipment. ENERGY STAR treats an air conditioner or heat pump over ten years old as a reason to consider professional evaluation, not an automatic expiration date. Move from routine maintenance to diagnosis when cooling, humidity, drainage, controls, electrical protection, or comfort changes persist. Compare repair and replacement when failures repeat, a major component is involved, warranty status is uncertain, or broader duct and comfort problems remain. Request complete written options rather than converting a tune-up into a pressure-driven replacement decision.

Sources: [energy-star-replace]

Stop and get qualified help

For fire, smoke, a carbon-monoxide alarm, suspected gas, or immediate danger, leave immediately and call 911 from a safe location. For suspected gas, don't operate switches, equipment, phones, or flames inside; contact the serving gas utility from outside after leaving. Keep away from arcing, damaged wiring, standing water near electrical equipment, or equipment that repeatedly trips a breaker. Shut the HVAC system off only when it is safe to do so for major water intrusion, icing, or abnormal operation. Don't open service panels, discharge capacitors, probe voltage, connect refrigerant gauges, add refrigerant, bypass safeties, access internal coils or blowers, clean combustion equipment, or work from an unsafe ladder, roof, attic, or crawlspace.

Sources: [cpsc-storm-safety], [epa-608], [doe-maintenance], [tdlr]