For Houston’s climate (hot, humid, long cooling season), HVAC maintenance is mostly about keeping your A/C efficient, managing humidity, and protecting equipment from heavy use. Here’s what typically needs to be done and how often.
Monthly (or Every 1–2 Months in Peak Season)
1. Replace or Clean Air Filters
During heavy A/C use (April–October in Houston), plan to change filters every 30–60 days.
Use the correct size and MERV rating recommended for your system.
Dirty filters can cause:
- Higher electric bills
- Poor cooling and weak airflow
- Frozen coils and possible compressor damage
2. Check Supply and Return Vents
- Make sure furniture, rugs, or curtains aren’t blocking vents
- Vacuum dust from grilles to keep airflow strong
Every 3–6 Months
3. Clean the Condensate Drain Line
This is very important in humid Houston, where algae buildup commonly causes clogs and water damage.
Basic homeowner method:
- Locate the PVC drain line near the indoor unit
- Pour 1 cup of distilled white vinegar or drain-line cleaner into the access port
- Confirm the outdoor drain is dripping when the A/C runs
Call us if you notice:
- Water in the secondary drain pan
- Water stains near vents or ceilings
- Water draining from your soffit
4. Rinse the Outdoor Condenser Unit
- Turn off power at the disconnect
- Gently hose off the sides (not the top) from inside-out if accessible
- Clear leaves, grass, and mulch at least 2 feet around the unit and from the inside of the condenser
In Houston, lawn clippings and pollen build up quickly and reduce cooling efficiency.
Twice Per Year (Professional Maintenance — Strongly Recommended)
For Houston homes, the ideal schedule is:
- Spring A/C tune-up: February–April
- Fall heating check: October–December (if you have a furnace or heat pump)
At least two professional visit per year is highly recommended.
What a Licensed HVAC Technician Should Do
1. Inspect and Clean Coils
- Evaporator coil (indoor) — clean and sanitize the supply air and the return air plenums to prevent biological growth
- Condenser coil (outdoor) — clean with water and coil cleaner when required
Dirty coils lead to: poor cooling, higher bills, and possible freeze-ups.
2. Check Refrigerant Charge
- Verify proper level
- Inspect for leaks
Low refrigerant in Houston heat can quickly damage the compressor.
3. Test Electrical Components and Safety Controls
- Capacitors
- Contactors
- Relays
- Tighten electrical connections
- Check fuses and breakers
4. Check Blower and Airflow
- Measure blower motor amp draw
- Verify fan speed settings
- Clean dirty or unbalanced blower wheel if needed
5. Inspect Ductwork (Visual Minimum)
Look for:
- Obvious air leaks
- Disconnected ducts
- Crushed flex duct
- Missing insulation (especially in hot Houston attics)
Leaky ducts can waste a significant amount of cooling into the attic.
6. Check Thermostat Operation
- Confirm accurate temperature reading
- Verify proper system cycling
- Adjust settings for comfort and efficiency
7. Inspect and Test Condensate System
- Flush the drain line
- Check or install a float switch (excellent protection in Houston homes)
8. Gas Heat Checks (If You Have a Furnace)
- Inspect heat exchanger for cracks
- Check burners and ignition
- Inspect flue vent
- Test for proper combustion and CO safety
Every 2–5 Years (or As Needed)
Duct Inspection and Sealing
Have a professional test for duct leakage, especially in older Houston homes.
Proper sealing with mastic/foil tape (not cloth duct tape) can:
- Improve comfort
- Lower energy bills
- Reduce attic air loss
Attic Insulation Check
Houston attics get extremely hot, and poor insulation puts a heavy load on your A/C.
Consider upgrading insulation or sealing attic air leaks if needed.
Houston-Specific Comfort Tips
Humidity Control
- Make sure the system is properly sized
- Oversized units cool fast but don’t dehumidify well
- If indoor humidity stays above 55–60%, ask about:
- Airflow adjustments
- Variable-speed systems
- Whole-home dehumidifiers
Recommended Thermostat Settings
Typical Houston summer setpoints:
- 75–78°F when home
- 78–82°F when away
Avoid large daily swings — Houston homes can take a long time to cool back down.
Watch for Early Warning Signs
Call for service if you notice:
- Longer run times
- Warm air from vents
- Ice on refrigerant lines or indoor coil
- Water around the indoor unit
- Unusual noises from indoor or outdoor unit
- Sudden jump in electric bill
- Weak airflow from vents
- Musty or burning smells
Need HVAC Maintenance in Cypress, Katy, or Cinco Ranch?
At Texas Star Heating and Cooling, we bring 45 years of HVAC experience serving homeowners across the Houston area.
Honest, reliable service
Thorough tune-ups
Houston-climate expertise
Call or text: 281-686-6861
Serving Cypress, Katy, Cinco Ranch, and surrounding areas.