AC Repair & HVAC Service in Schertz, TX
Free quotes from independent local HVAC contractors for Schertz homes, from a weak upstairs to an AC that quit in July. We connect Schertz homeowners with independent, TDLR-licensed local HVAC contractors for free, no-obligation quotes. The contractor you choose diagnoses, quotes, pulls the permit and does the work directly with you.
Get a Free Quote Call (727) 300-6656Schertz homes: mostly 2000s, mostly owner-occupied
Schertz reaches into three counties, Guadalupe, Bexar and Comal, and grew 9.1% between 2020 and 2025, from 42,137 to an estimated 45,978 residents (Census Bureau).
| Schertz housing (ACS 2024 5-year) | Figure |
|---|---|
| Median year built | 2002 |
| Homes built 2010 or later | 29.3% |
| Homes built before 1980 | 17.4% |
| Owner-occupied | 78.4% |
| Median home value | $317,100 |
Source: U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020–2024).
Half of Schertz homes were built before 2002. If your system is original to the house or more than 10 years old, ENERGY STAR suggests considering replacement, so a replacement quote is worth having next to any big repair. The ACS estimates about 81% of homes heat with electricity, a figure that includes heat pumps and electric furnaces. Older homes may have older ductwork worth inspecting.
Attic air handlers and ducts in the heat
Attic ducts and air handlers are common in San Antonio-area homes, and a DOE case study found vented attics here average about 130 °F. ENERGY STAR says 20–30% of the air moving through a duct system can be lost, and recommends insulating attic ducts to at least R-6. With cooling degree days outnumbering heating degree days about 2.2 to 1 at the San Antonio airport, those losses show up mostly on the summer bill.
Uneven rooms, dust around vents and a system that runs constantly are reasons to ask for a duct inspection. See duct cleaning and ductwork repair or the guide to attic AC ducts in Texas heat.
Permits in Schertz: check with the city
The Schertz Inspections Division covers building permits, inspections and contractor registration, and enforces the building, residential, electrical, energy, gas, mechanical and plumbing codes adopted by the city. It adopted the 2026 National Electrical Code effective September 1, 2026. We could not confirm the city’s exact HVAC permit steps, so check with the city before a replacement: Inspections@schertz.com or 210-619-1750.
Whoever you hire, get the TDLR license number (TACLA… or TACLB…) and look it up at the TDLR license search.
HVAC quotes Schertz homeowners request
- Duct cleaning and ductwork: leak checks, sealing and attic duct insulation.
- AC replacement: when an older system needs a big repair.
- AC maintenance: filter, coil and drain checks before summer.
- Heat pumps: repair or replacement in all-electric homes.
- Emergency AC repair: after-hours service usually costs more.
- Heating repair: furnace and strip-heat problems in winter.
Typical costs
| Job | Typical range |
|---|---|
| Air duct cleaning | $300–$700 |
| Duct repair (sections) | $500–$2,600 |
| Ductwork replacement (3 tons, San Antonio) | $6,000–$9,000 |
| Typical AC repair | $250–$700 |
Typical ranges from published cost guides (2024–2026) — estimates, not quotes. National unless marked San Antonio.
More in the AC and HVAC cost guide.
Schertz HVAC questions
Do I need a permit to replace an AC in Schertz?
Check with the city. The Schertz Inspections Division handles building permits, inspections and contractor registration and enforces the city’s mechanical and energy codes, but we have not confirmed its exact rules for an HVAC change-out. Ask the contractor to confirm the permit, and contact Inspections@schertz.com or 210-619-1750. This is general information, not legal advice.
Why does my upstairs stay hot in summer?
Common causes include leaky or poorly insulated attic ducts, a dirty filter, a system that was undersized for the house, or poor return airflow upstairs. Attics in San Antonio-area homes can average about 130 °F, so duct losses add up. An HVAC contractor can measure airflow and check the ducts before recommending a fix.
Should I get my ducts cleaned or repaired?
Cleaning removes dust and debris; repair seals leaks and replaces damaged sections. ENERGY STAR says 20–30% of the air moving through ducts can be lost to leaks and poor connections, so a leak check often matters more than cleaning. Published guides put cleaning at about $300–$700 and section repairs at about $500–$2,600.
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