Heat pumps
Heat pump services in O'Fallon, MO
Year-round heating and cooling from one efficient system, repair, replacement, and twice-a-year maintenance from technicians who service heat pumps in both directions.
How it works
One system that heats and cools
A heat pump doesn't make heat, it moves it. Flip the season below, watch the refrigerant loop reverse, and tap each numbered part to see what it does and what our technicians check there.
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Reversing valve
In winter the valve flips the refrigerant path, so the same loop now pulls heat from outdoor air and releases it inside. One machine, both seasons, this valve is the switch.
On a Swiss Air visit: A stuck reversing valve is a classic 'blows warm in summer / cold in winter' failure. We test it in both modes on every heat pump visit.
How a heat pump visit goes
Test both modes
Heating and cooling are one loop, we verify the reversing valve and performance in each direction.
Explain your options
Upfront pricing on repairs, and honest sizing math if replacement makes more sense.
Repair or install
Correct refrigerant charge and airflow setup, the two things that make or break heat pump efficiency.
Verify the numbers
We confirm temperature split and backup-heat behavior so winter bills don't surprise you.
Keep learning
Heat pump guides, no sales pitch
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How heat pumps work
Moving heat instead of making it.
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How dual-fuel works
Heat pump + furnace together.
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Heat pump vs. furnace
Which fits a Missouri winter?
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Dual-fuel vs. heat-pump-only
Backup heat, compared honestly.
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Trane heat pumps & dual-fuel systems
The heat-pump equipment we install, honestly explained.
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HVAC emergency? Start here
No heat, no cooling, what to do in the first minutes.
Talk to a technician
Not sure what you need?
Tell us what the system is doing and we'll call you back with a straight answer — no pressure, no guesswork.
(636) 978-7800Prefer to talk now? We answer 24/7.
Tell us what's wrong
Send us the details and we'll call you back.
Explore more
Other services and the areas we cover
Other services
Service areas we cover
- Ladue
- Clayton
- Chesterfield
- Wildwood
- Creve Coeur
- Kirkwood
- Webster Groves
- Sunset Hills
- St. Albans
- Weldon Spring
- Dardenne Prairie
- Lake St. Louis
- Cottleville
- O'Fallon
- St. Charles
- St. Peters
- Wentzville
- Ballwin
- Ellisville
- Manchester
- Winchester
- New Melle
- Defiance
- Fenton
- Oakville
- Valley Park
- Twin Oaks
- Rock Hill
- Brentwood
- Richmond Heights
- Maryland Heights
- Maplewood
- University City
- Affton
- Overland
- Bridgeton
- Hazelwood
- Florissant
- St. Ann
- Charlack
- Cool Valley
- Troy
- Moscow Mills
- Old Monroe
- Winfield
- Foley
- Hawk Point
- Warrenton
- Truesdale
- Wright City
- Marthasville
- Lake Sherwood
- Foristell
Ready when you are
Contact us to schedule your service today.
Fast, professional HVAC service across O'Fallon, St. Charles County, and the surrounding St. Louis area.