Top-rated independent heating and cooling across north Georgia and the southern Appalachians
Dual-Fuel System Repair
We repair dual-fuel systems, the pairing of a heat pump with a gas or propane furnace that swaps between the two as outdoor temperatures drop. Homeowners across Alabama, Georgia, Kentucky, North Carolina, South Carolina and Tennessee call us when the furnace runs on mild days, the heat pump grinds on through a hard freeze, or the changeover never happens at all. Check your thermostat settings and batteries first, then call us and tell us what the outdoor temperature was when the trouble showed up.
Call (888) 878-4879- Real people on the phone
- 7 days a week
- Quote in writing before any work
Taking calls until 5:00 PM ET
What a dual-fuel repair actually involves
A dual-fuel system has two heat sources and one brain deciding which runs. Most of the faults we find live in that decision: a balance point set wrong, an outdoor sensor reading badly, a thermostat that lost its configuration after a power blip, or control wiring that corroded in a damp crawlspace. We trace the call for heat from the thermostat through the control board to whichever stage should be firing, then find where the signal stops. Sometimes the repair is on the heat pump side, sometimes the furnace, sometimes the wire between them.
What we check on the visit
We start with the thermostat type and its programming, because a standard thermostat wired to a dual-fuel setup will never switch correctly. Then the outdoor sensor and its placement, the balance point setting, and the lockout that keeps both heat sources from running at once. On the heat pump we check refrigerant charge, defrost operation and the reversing valve. On the furnace we check ignition, flame sense and venting. Control wiring gets inspected end to end, and ridge homes on propane get a look at supply and regulation.
How we decide it is the right call
We look at what the system is doing against what the weather is doing. A heat pump straining at twenty degrees while the furnace sits idle points to changeover, not a failed compressor. A furnace running on a fifty degree afternoon points the same direction. If both sources test sound and only the switching is off, that is a controls repair and a short one. If the compressor is drawing hard, the coil is leaking, or the heat exchanger shows damage, we explain what we found and what replacement of that half would involve.
Other heat pump repair work
The same on every visit
The quote comes first, in writing
Covering 81 cities across Alabama, Georgia, Kentucky and 3 more.Phones answered by people
Open 7 days, 8:00 AM to 5:00 PM ET.Every major brand, gas and electric
Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.Dual-Fuel System Repair — quick answers
Why is my furnace running when it is not that cold outside?
Usually the balance point or outdoor sensor is off, so the control thinks it is colder than it is. It can also be a thermostat that lost its dual-fuel configuration. Both are checked on the same visit.
Can I use any thermostat with a dual-fuel system?
No. The thermostat has to support dual-fuel changeover and be wired for it. Swapping in a standard model is a common cause of a heat pump running through freezing nights with the furnace never firing.
Does the heat pump and furnace ever run at the same time?
They should not. A lockout keeps one from running while the other is active. If you hear both, the lockout or the control wiring needs attention, and we would rather look at it sooner.
How it works
- Step 1
Tell us the symptom
Call or fill in the quote form and describe what you hear, smell or feel. Warm air, short cycling, a breaker that keeps tripping. That gives us a head start on the likely cause.
- Step 2
We diagnose on site
A technician checks the thermostat, airflow, electrical connections, refrigerant performance and the outdoor unit. We work the crawlspace and the attic too, because ductwork and drainage cause more trouble than people expect.
- Step 3
You decide, then we fix it
We explain what failed, what it takes to repair it, and what we would watch next season. No work starts until you say go. Most repairs finish the same visit when parts are on the truck.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Mixed heating is normal to usHeat pumps, propane furnaces and dual-fuel setups all behave differently in cold weather. We know how a heat pump should sound in the thirties and when the backup heat is doing too much of the work.
- We go under the houseRed clay crawlspaces hide crushed ducts, sweating lines and standing water. Comfort problems often start down there, not at the unit, so we look before we start replacing parts you may not need.
- Plain explanationsYou get told what broke and why, in words that make sense. If a repair is a short-term patch on an aging system, we say that out loud so you can plan instead of guessing.
- One crew, six statesWe serve homeowners across Alabama, Georgia, Kentucky, North Carolina, South Carolina and Tennessee. Same approach in every one: show up, diagnose properly, repair what needs repairing, leave the space clean.
- All major brands, gas & electricOne independent crew for Carrier, Trane, Lennox, Goodman, Rheem and more.
- Straight answersNot worth fixing? We say that out loud, and often it saves you the visit fee.
Dual-Fuel System Repair
Ready to book dual-fuel system repair?
Describe the system and your ZIP. The written quote comes before any work.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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