"Tune-up" can mean anything from a 15-minute filter swap to a full system workup. The difference matters: a real preventive maintenance (PM) visit catches the small failures — a weak capacitor, a clogged drain, a dirty coil — before they become a 104°F breakdown call in July. Here's what a proper PM includes, how often you need one, and how to tell if you're getting the real thing.
Why PM Pays for Itself in Texas
Fewer breakdowns
Most summer no-cool calls trace back to parts that were visibly failing months earlier.
Lower bills
Dirty coils and low airflow quietly cut efficiency. Clean equipment runs shorter cycles.
Longer life
Compressors die from heat, dirt, and electrical stress. PM attacks all three.
Warranty protection
Many manufacturer and home-warranty terms expect documented maintenance.
What a Real PM Visit Includes
Cooling (spring / early summer)
| Task | Why it matters |
|---|---|
| Test capacitor(s) against rated µF | The #1 summer failure part. A weak cap overheats the compressor. |
| Inspect contactor, wiring, disconnect | Pitted contacts and loose lugs cause hard starts and burned wires. |
| Measure refrigerant via superheat / subcooling | Confirms correct charge without "topping off" blindly — and flags leaks. |
| Clean condenser coil | Cottonwood, dust, and grass clippings choke heat rejection. |
| Inspect evaporator coil & blower | A dirty indoor coil kills airflow and can freeze up. |
| Flush condensate drain, test float switch | Prevents ceiling stains and water damage in attic installs. |
| Measure temperature split & static pressure | Hard numbers that show how the system is actually performing. |
| Amp-draw on compressor & fan motors | Early warning for motors and compressors on their way out. |
| Check filter, thermostat, and cycle operation | Basics — but skipped on cheap "tune-ups." |
Heating (fall)
- Inspect heat exchanger for cracks; carbon monoxide check at the flue and supply
- Clean and test flame sensor; verify ignitor and gas pressure
- Test limit switches, inducer motor, and pressure switch
- Heat pumps: verify defrost cycle, reversing valve, and backup heat strips
Want to do the homeowner side yourself in between? Use our Year-Round HVAC Checklist and the seasonal guides: Spring Startup and Fall Inspection.
How Often? A Simple Schedule
| Property | Recommended PM |
|---|---|
| Home — AC + gas furnace | 2× per year: spring (cooling) + fall (heating) |
| Home — heat pump | 2× per year: it works year-round in Texas |
| Rental / short-term rental | 2× per year + filter changes between tenants |
| Office / retail RTUs | Quarterly: filters, belts, coils, economizer |
| Restaurants, clinics, server rooms | Monthly to quarterly, based on run hours & load |
Commercial PM: What Facility Managers Should Expect
For rooftop units and light commercial systems, a PM program should be documented and repeatable — not a tech showing up when someone remembers to call.
- Unit-by-unit log with readings, photos, and deficiencies after every visit
- Filter and belt replacement on a set schedule with sizes on file
- Economizer and controls check so you're not cooling with the dampers stuck
- Priority dispatch for PM customers when something does fail
- Budget forecasting — which units are trending toward replacement, and when
Red Flags: How to Spot a Fake "Tune-Up"
- No gauges or meters ever come out — just a look and a hose-down
- "You're low on refrigerant" with no leak search, every single visit
- No written report with actual readings
- The $49 visit that turns into a high-pressure replacement pitch
Residential and commercial maintenance programs with documented readings, priority scheduling, and honest recommendations — never a sales pitch disguised as a tune-up. Call (830) 252-9000 to set your schedule.
Quick Answers
How often should I get HVAC maintenance in Texas?
Twice a year for most homes: a cooling tune-up in spring and a heating inspection in fall. Commercial rooftop units typically need quarterly service.
How long does an HVAC maintenance visit take?
A thorough residential PM takes about 45 to 90 minutes per system, depending on access and what the technician finds.
Does maintenance affect my warranty?
Many manufacturer and home-warranty contracts expect proper maintenance. Keeping written PM records helps protect your coverage if a claim is ever disputed.