HVAC Technician prices in Saint Louis, MO
| Project | Time | Typical cost | Range |
|---|
| Diagnostic service call (no parts) |
45–90 min |
$64 |
$53 – $77 |
| Annual AC or furnace tune-up |
60–90 min |
$119 |
$97 – $142 |
| AC repair (capacitor / contactor / minor part) |
1–3 hours |
$288 |
$236 – $346 |
| Refrigerant recharge (R-410A, residential) |
1–2 hours |
$344 |
$282 – $413 |
| Smart thermostat install |
1 hour |
$256 |
$210 – $307 |
| Gas furnace replacement (80% AFUE, 80k BTU) |
1 day |
$2,639 |
$2,164 – $3,167 |
| Heat pump replacement (3-ton, 16 SEER) |
1–2 days |
$6,034 |
$4,948 – $7,241 |
| Mini-split install (single zone, 12k BTU) |
1 day |
$2,196 |
$1,801 – $2,636 |
| Whole-home duct cleaning |
3–5 hours |
$311 |
$255 – $373 |
Local rate = BLS national mean × 2.4 markup × (MO COL 88.5/100). Materials adjusted by the same factor.
What a hvac technician in Saint Louis actually does
A residential HVAC technician services, repairs, and installs forced-air furnaces, central AC, heat pumps, mini-splits, and ductwork. A diagnostic visit typically includes static-pressure measurement, refrigerant pressure (for cooling systems), temperature differential between supply and return, electrical-component testing (capacitor microfarad, contactor pull-in, transformer voltage), and ignition or burner inspection on heating equipment. Installations require Manual J / Manual D / Manual S calculations to size the equipment correctly — beware any installer who skips these and recommends "the same size you have now."
Questions to ask before you hire in MO
- Are you NATE-certified, and is your company licensed and insured in this state?
- For a replacement: did you run a Manual J load calculation, and can I see it in writing?
- What SEER2/HSPF2 is the equipment you're quoting, and what's the AHRI match number?
- Does the quote include duct sealing, thermostat, condensate pump (if needed), and permit?
- What's the labor warranty, and is the manufacturer warranty registered in my name?
- Will you provide commissioning data (subcooling/superheat, static pressure) at completion?
"Same-size replacement" without a load calc, refrigerant-only quotes that don't address the leak, and any installer who pushes the largest unit without explaining why.
7 licensed hvac technicians in Saint Louis
Taylor Air Pros
📍 7646 Meadow St, Saint Louis, MO 63155
★ 4.9 / 5 · 136 reviews · 31 years in business
✓ Licensed ✓ Insured BBB A- 31 yrs
Specialties: Duct cleaning, AC repair, Boiler service, Annual tune-up, Thermostat install
Premier HVAC
📍 9727 Hill Dr, Saint Louis, MO 63101
★ 4.3 / 5 · 384 reviews · 37 years in business
✓ Licensed ✓ Insured BBB A+ 37 yrs
Specialties: Duct cleaning, Refrigerant recharge, Annual tune-up, Thermostat install
Moore Climate
📍 1435 River Pkwy, Saint Louis, MO 63102
★ 4.4 / 5 · 42 reviews · 12 years in business
✓ Licensed ✓ Insured BBB A- 24/7 Emergency 12 yrs
Specialties: Mini-split install, Furnace install, Air-quality test
Saint Louis HVAC
📍 3693 Hill Blvd, Saint Louis, MO 63155
★ 4.8 / 5 · 205 reviews · 35 years in business
✓ Licensed ✓ Insured 35 yrs
Specialties: Boiler service, Heat pump replacement, AC repair
Pacific Heating & Cooling
📍 1864 Sunset Ct, Saint Louis, MO 63101
★ 4.4 / 5 · 237 reviews · 17 years in business
✓ Licensed ✓ Insured BBB A+ 24/7 Emergency 17 yrs
Specialties: AC repair, Heat pump replacement, Furnace install
Coleman HVAC
📍 4465 Birch Blvd, Saint Louis, MO 63102
★ 4.9 / 5 · 248 reviews · 18 years in business
✓ Licensed ✓ Insured 18 yrs
Specialties: Furnace install, Boiler service, Mini-split install, Air-quality test
Moore Temperature
📍 1532 Park Pkwy, Saint Louis, MO 63155
★ 4.0 / 5 · 75 reviews · 6 years in business
✓ Licensed ✓ Insured BBB A 6 yrs
Specialties: Mini-split install, AC repair, Refrigerant recharge, Boiler service, Duct cleaning
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Seasonal hvac checklist for Saint Louis homeowners
Spring
- Schedule an AC tune-up before May; pros are 30–40% cheaper in shoulder season than during the first July heatwave.
- Replace HVAC filters (every 30–90 days depending on type and pets).
- Hose down the outdoor condenser coil and clear at least 2 feet of vegetation around it.
- Test the AC by setting it to 5°F below indoor temperature; it should kick on within 30 seconds and the supply registers should blow noticeably cool air within 5 minutes.
Fall
- Schedule a furnace or heat-pump tune-up before October.
- Replace HVAC filters again going into heating season.
- Clear leaves from around the outdoor condenser/heat pump and cover the top only (never wrap the sides).
- Test CO detectors near gas-burning appliances; replace batteries.
- Run the furnace for 10 minutes before the first cold snap; address any odd smells, banging, or short-cycling now.
Winter
- Keep furniture and rugs at least 6 inches off supply registers and return-air grilles.
- Inspect attic insulation; less than R-30 is the #1 reason heating bills run high in older homes.
- Defrost outdoor heat-pump coils once every 2–3 weeks during sustained cold.