Heating & Air Conditioning in Schertz, TX

Duke Service Co handles residential and light-commercial heating and cooling across Schertz and the surrounding area. From an AC that quit in a heat wave to a furnace that won't light on the first cold night, the fastest way to get help is to call — you'll reach a local technician, not a call center.

Furnace installation

High-efficiency furnace installs with correct venting, sizing, and thermostat setup.

Ductless mini-splits

Single and multi-zone systems for additions, garages, and rooms that never cool right.

Thermostat installation

Smart and programmable thermostat wiring, setup, and configuration.

Heat pump service

Install, repair, and tune-ups for air-source and cold-climate heat pumps.

Emergency service

Urgent no-heat and no-cool calls handled fast, before small faults become failures.

AC installation & replacement

Properly sized new systems with load calculations, from value units to high-SEER equipment.

Heating & Cooling in Schertz, Texas

Texas heat is a season-long endurance test — Schertz air conditioners routinely run from March to November, and grid-stressing summer peaks make efficient, well-maintained equipment pay for itself. Sudden winter freezes have also proven that reliable heating can't be an afterthought. Local providers like Duke Service Co understand these conditions and service equipment accordingly.

Common HVAC Problems in Schertz

Weak airflow from vents

Weak or uneven airflow usually points to a clogged filter, leaky ductwork, or a failing blower motor. Left alone it forces the system to run longer and drives up energy bills.

Frozen evaporator coil

Ice on the indoor coil chokes cooling entirely. Restricted airflow or low refrigerant are the usual causes, and running the unit while frozen risks compressor damage.

Uneven temperatures between floors

Multi-level homes often suffer hot upstairs rooms in summer. Duct adjustments, zoning dampers, or a ductless unit for the problem area are common solutions.

Strange noises at startup

Grinding, squealing, or banging at startup often signals worn bearings, a loose blower wheel, or delayed furnace ignition — all worth addressing before they become breakdowns.

Why Choose a Local Texas Company

Same-area service means faster response when the weather turns and equipment fails at the worst moment. Local companies live on reputation, and word travels fast in the community when work is done right. A provider who works these neighborhoods daily has seen your exact system and failure pattern before.

Seasonal Tips for Texas Homes

Keep the condensate drain line clear; in humid climates algae builds fast and an overflow can shut the system down mid-summer.
Watch humidity, not just temperature: a system that cools but does not dehumidify may be oversized or low on refrigerant.
Book pre-season AC tune-ups in early spring — waiting until the first heat wave means longer waits and higher stakes.
Shade the outdoor unit if possible, but keep at least two feet of clearance for airflow on all sides.

Frequently Asked Questions

How can I lower my heating and cooling bills?

Regular maintenance, fresh filters, a programmable thermostat, sealed ducts, and sensible temperature setbacks together typically trim 10–25% off energy use without sacrificing comfort.

What are signs of duct problems?

Rooms that never reach temperature, whistling sounds, dusty air, and high bills all point to leaky or unbalanced ductwork. Sealing and balancing often deliver the biggest comfort improvement per dollar.

How long does an air conditioner last?

A well-maintained central air conditioner typically lasts 12–17 years. Systems that run long seasons or skip maintenance wear out sooner, while regular tune-ups and prompt repairs stretch lifespan toward the upper end.

How often should I change my air filter?

Every 1–3 months for standard filters, depending on pets, dust, and usage. A clean filter is the cheapest way to protect airflow, efficiency, and indoor air quality.

Is emergency HVAC service available?

Many local providers, including Duke Service Co, take urgent calls — a failed furnace in winter or dead AC in a heat wave should not wait. Call (210) 294-9254 to check availability.