AC Tune-Up Season in Texas: What to Ask, What to Skip, and How to Avoid Upsell Traps

Spring in Liberty County feels like a warning shot. By the time April hits Baytown, Crosby, and Highlands, you've already had two or three days that remind you your AC isn't optional — it's life support. Getting a tune-up before the heat locks in is smart. Getting taken advantage of during one is easier than most people realize.

This guide covers what a legitimate tune-up actually includes, what technicians try to add that you probably don't need, and how to protect yourself from inflated repair estimates before ERCOT starts sweating through another Texas summer.

What Does a Legitimate AC Tune-Up Actually Include?

A real AC tune-up has about 15 to 20 specific tasks, and most of them take a trained tech between 45 minutes and an hour and a half to complete properly.

Here's what should be on every checklist, no exceptions:

Electrical checks: The tech should test capacitors, contactors, and wiring connections. A failing capacitor is one of the most common summer failures in Southeast Texas, and they cost $15 to $80 in parts — not $300.

Refrigerant level check: This means actually measuring superheat or subcooling with gauges, not just glancing at the system. If refrigerant is low, there's a leak somewhere. Topping off without finding the source is a band-aid that'll cost you again in 90 days.

Coil cleaning: Both the evaporator coil (inside) and condenser coil (outside) should be inspected and cleaned. The condenser unit outside takes a beating from Chambers County's coastal humidity and the kind of pollen load you get near the Trinity River basin. Dirty coils make your system work 10 to 15 percent harder and can reduce efficiency measurably over a season.

Drain line flush: This is non-negotiable in East Texas. The humidity levels in Harris County's Baytown area and across Liberty County create prime conditions for algae buildup in condensate lines. A blocked drain causes water damage fast.

Blower and motor inspection: Check amperage draws, lubricate moving parts where applicable, and confirm airflow is hitting the right CFM range for your system's rated capacity.

Thermostat calibration: Takes five minutes. Still matters.

Filter check: The tech should check it, but replacing it isn't their job unless you pay for it separately. A Filtrete 1500 MPR filter runs $20 to $30 at Home Depot in Baytown. You can handle that part yourself.

A tune-up that covers all of this should cost between $75 and $150 for most residential systems in our area. If someone quotes you $49, they're planning to make it up somewhere else.

What Should I Ask the Tech Before They Start?

Ask four things before any work begins, and you'll eliminate most of the upsell games before they start.

First, ask if they're licensed through the Texas Department of Licensing and Regulation. TDLR licenses HVAC contractors in Texas, and you can verify any license at their website in about 60 seconds. An unlicensed tech has no legal business touching your system.

Second, ask for the written checklist they'll complete. Any legitimate company has one. If they can't hand you a printed or digital list of what they're inspecting, that's a problem.

Third, ask whether refrigerant is included in the base price or billed separately. Refrigerant is expensive — R-410A runs $50 to $100 per pound depending on supplier — and a dishonest tech can claim your system needs a pound when it doesn't.

Fourth, if they recommend any repairs, ask to see the failed part or the meter reading that supports the diagnosis. "Your capacitor's going bad" should come with a capacitor tester reading, not just their word for it.

Which Add-Ons Are Worth Paying For?

Some upsells are legitimate. The issue is knowing which ones.

UV lights: These are worth considering if you have documented mold or microbial growth in your air handler. In humid climates like we deal with in Chambers County and coastal Harris County, it's a real concern. A good UV light system from a brand like RGF or Fresh-Aire UV runs $200 to $500 installed. A tech who quotes you $800 for a UV light without explaining the specific condition it's treating is marking up way too much.

Capacitor replacement: If the reading is below 90 percent of rated capacitance, replace it. Parts are cheap. Labor is 20 to 30 minutes. Total cost should be under $150. That's a legitimate repair.

Drain line treatment tablets: A $5 tablet that prevents algae buildup for three months. If a tech offers them, say yes. They shouldn't charge you more than $15 to $25 for the service.

Coil cleaning upgrades: If you've got a particularly dirty system or haven't had it cleaned in 3 years, a chemical coil flush is worth the extra $50 to $100.

My take: the single best "extra" you can pay for is a combustion analysis on any gas components, and hardly anyone in the residential AC world pushes it hard enough. If your system has a gas furnace or gas auxiliary heat, this matters.

What Upsells Should I Skip?

This is where you save money.

Duct sealing every single visit: Duct leakage is a real issue — studies from Texas A&M's Energy Systems Lab have documented that the average Texas home loses 20 to 30 percent of conditioned air through duct leaks. But duct sealing isn't an annual tune-up item. If someone recommends it every visit, they're farming you.

Full duct cleaning unless there's a real reason: Duct cleaning costs $300 to $600 in this market. It's legitimate if you've had recent renovations, visible mold, or pest activity in the ductwork. It's not a routine tune-up add-on.

"Tune-Up Upgrade Packages" with vague descriptions: If a service package has a name like "Premium Care Plan" and a price of $299 but the description uses words like "enhanced inspection" without listing specific tasks, skip it.

Refrigerant flush and recharge on a newer system: A sealed refrigerant system that was properly charged at installation shouldn't need refrigerant added unless there's a leak. If a tech on a system under 7 years old says you need refrigerant without identifying a leak source first, get a second opinion.

When Should I Agree to a Repair vs. Get a Second Opinion?

Some repairs are obvious yes answers. Others deserve a second look.

Say yes immediately to:

• Capacitor replacement (reading confirmed, cost under $150)
• Contactor replacement (visible burning or pitting, cost under $200)
• Condensate drain clearing (confirmed blockage, cost under $100)
• Replacing a run-capacitor or start capacitor showing measurable degradation

Get a second opinion before saying yes to:

• Any compressor replacement over $1,200
• Full system replacement recommended during a tune-up
• Refrigerant leak repair quoted over $400 without a written leak location report
• Evaporator coil replacement quoted over $1,800 on a system under 10 years old

The reason to pump the brakes on big-ticket recommendations during a tune-up specifically is that the incentive structure runs against you. A tech who finds a $2,500 repair during a $99 tune-up visit has a clear financial motivation. That doesn't make the recommendation wrong — it just means you should verify it.

One reliable way to check: call CenterPoint Energy's home service line (if you're in their coverage area for gas) or ask Entergy Texas about their appliance service programs. Both have affiliated service networks with some accountability. More importantly, find one TDLR-licensed HVAC company in your area you trust before you need them, not during a breakdown.

When's the Right Time to Schedule an AC Tune-Up in East Texas?

Schedule between February 15 and April 15. That's the window.

Here's the reasoning. Baytown, Highlands, and Crosby start seeing serious heat by early May. Scheduling in late April means you're in the queue with every other homeowner who waited, and techs are slammed. Scheduling in February means you get a less rushed inspection, better availability, and time to address any repair findings before they become emergencies.

The worst time to get a tune-up is when your system is already struggling. At that point, it's a diagnostic call, not a tune-up, and you'll pay accordingly.

For Liberty County homeowners specifically, keep in mind that the humidity profile around the Trinity River corridor means your system's drain components and coil surfaces take more punishment than someone living in, say, Tarrant County. That moisture load is real, and it argues for staying on an annual schedule, not biannual.

How Do I Find a Trustworthy HVAC Company in This Area?

Start with TDLR verification. Full stop.

The Texas Department of Licensing and Regulation maintains an online lookup for HVAC contractors. Before you book anyone, confirm their license is active and hasn't had disciplinary actions. This takes three minutes and eliminates a significant slice of fly-by-night operators.

After that, look for companies that have been in the area at least 7 to 10 years. There are legitimate outfits in the Baytown, Deer Park, and Liberty County corridor that have multi-generational roots. They're not hard to find. They care about their name because their name is their business.

Ask specifically if the tech they send is TDLR-licensed individually, not just the company. The company license is required, but the technician who shows up to your house in Chambers County should carry their own certification as well.

Avoid the $49 tune-up specials run by large national franchise operations that operate in the greater Houston market. That price point is a loss leader, and the business model depends on upselling at the door. You will not come out ahead.

What Should My System Be Doing After a Proper Tune-Up?

After a legitimate tune-up, your system should cool the house to setpoint consistently, run in cycles that feel balanced rather than short and frantic, and show no visible moisture around the air handler or drain pan.

Check a few things yourself in the 48 hours after the visit. Put a thermometer in a supply register and a return register. The difference should be 14 to 22 degrees Fahrenheit. If it's less than 10 degrees, call back. That's not right.

Listen for any new sounds — rattling, hissing, or squealing that wasn't there before. A tech who leaves a loose panel or disturbs something during the visit should own that.

Also look at your Entergy Texas bill or your CenterPoint gas bill for the following month. A well-maintained system in Harris or Liberty County should use 10 to 15 percent less energy per cooling-degree-day compared to a dirty, unchecked system. If your summer bills don't shift at all after a tune-up and your usage pattern is similar, something either wasn't done or wasn't done right.

The Short Version for Anyone Who Scrolled to the Bottom

Get your tune-up in February or March. Pay $75 to $150 for it. Ask to see the checklist and verify TDLR licensing before anyone touches your system. Say yes to small, clearly documented repairs. Slow down on anything over $500 unless you have a written explanation and a second opinion.

East Texas summers don't give you a grace period. Your AC running strong through August isn't luck — it's maintenance done right, by the right people, at the right time of year.