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Heating Repair · Jacksonville, FL

Heating & Heat Pump Repair in Jacksonville, FL

Most No-Heat Calls Come Down to One Part. We'll Find It.

When your heating system stops working during a Florida cold front, you need a reliable local HVAC contractor who can identify the problem and explain the best repair options.

Mighty Air provides professional heating repair throughout Jacksonville and Northeast Florida, including heat pump diagnostics, electric heating components, auxiliary heat systems, thermostats, and compatible HVAC equipment. Our technicians focus on identifying the actual cause of the problem before recommending repairs or replacement.

Schedule Heating Repair Call (904) 292-0636
Call Mighty Air, Inc. at (904) 292-0636 to schedule heating repair in Jacksonville.

Service Call Fee Waived With Qualifying Major Repairs

Our technicians evaluate your system, explain recommended repairs, and review applicable offers before work begins.

Offer applies to qualifying repairs. Contact Mighty Air for current promotions, eligibility, and details. Cannot be combined with other offers unless otherwise stated.

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Heat pump repair in Jacksonville

Heat Pump Repair in Jacksonville

Heat pumps are the most common heating system in Northeast Florida. One system provides both cooling and heating, reversing its normal cooling operation on colder days to bring heat into your home.

Because heat pumps can sit in cooling mode for most of the year, heating problems often show up on the first cold night. Mighty Air diagnoses and repairs:

  • Reversing valve problems
  • Defrost controls and sensors
  • Compressor and refrigerant-related issues
  • Electrical components and control boards
  • Thermostat communication problems
  • Auxiliary and emergency heat operation
  • Airflow and ductwork restrictions
Schedule Heating Repair Heat Pump Services
Technician testing the defrost control board inside a heat pump
Idle all summer. Needed tonight.Heat strips, sequencers, defrost boards, thermostats. One of them usually explains the call.
What's normal for a heat pump, and what's not

What's Normal for a Heat Pump, and What's Not

A heat pump doesn't blast hot air the way a gas furnace does. Air at the vents typically runs in the 90s, compared with 120 degrees or more from a furnace, so it can feel cool to the hand even when the system is working fine. On cold, damp mornings the outdoor unit will run a defrost cycle, and you may see steam rise off it for a few minutes. Your thermostat may show "AUX" during that time. That's the heat strips helping out, and it's normal.

What isn't normal: "AUX" showing most of the day, the outdoor unit iced over and not clearing, or a house that keeps losing ground on the thermostat. Those usually point to a defrost control, reversing valve, refrigerant, or heat strip problem.

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Thermostat showing AUX heat on a cold Jacksonville morning
AUX on a cold morning is normal.AUX all day is a service call.
The first cold front

No Heat on the First Cold Night? That's Our Busiest Week.

Call early in the day if you can. We'll test the system, show you what we found, and price the repair before we fix it.

Schedule Heating Repair Call (904) 292-0636
Technician inspecting electric heat strips inside an air handler
Electric heat and auxiliary heating repairs

Electric Heat & Auxiliary Heating Repairs

Many Florida HVAC systems use electric heating elements or auxiliary heat strips to provide additional heating when needed. Mighty Air can diagnose problems involving compatible electric heating elements, sequencers, relays, thermostats, wiring, and other electrical controls. Auxiliary heat can operate normally under certain conditions, like very cold mornings or a defrost cycle. But if it runs frequently, runs constantly, or doesn't turn on when it should, something in the system needs attention.

HVAC Parts Repair
Technician evaluating a gas furnace in a Jacksonville utility closet
Furnace repair

Furnace Repair

Some Jacksonville properties heat with a gas furnace. Mighty Air can troubleshoot and service furnace systems for properties that use them. Any suspected gas or combustion concern should always be evaluated by a qualified professional.

Heating Replacement Options
Repair before replacement

Repair Before Replacement

A heating problem does not automatically mean you need a new system. Before recommending replacement, Mighty Air evaluates all of this.

Option oneRepairThe practical answer for most problems
Option twoReplaceWhen we can explain exactly why
  1. 01System condition
  2. 02Repair cost
  3. 03Equipment age
  4. 04Parts availability
  5. 05Performance

For many problems, a repair is the most practical answer. If replacement makes more sense, we'll explain why and walk you through your options.

Heating Installation & Replacement
Before we arrive

Safety First

A few things to do, and not do, before we arrive.

  • Electrical hazards, smoke, or burning odorsTurn the system off if it's safe to do so. If you see smoke or fire, leave the area and call 911.
  • Suspected gas or carbon monoxide problemsLeave the area and contact your gas utility or emergency services.
  • Don't open the equipmentBasic checks are fine, like the thermostat setting, the breaker, and an easy-to-reach air filter. Leave internal electrical and mechanical components to a technician.
Keep your heating system ready

Keep Your Heating System Ready

Many heating problems start during the months a system sits unused. Regular HVAC Maintenance catches worn components before cold weather, and our Maintenance Memberships include two preventive maintenance visits a year and a repair discount. If your cooling system needs attention too, see our AC Repair services.

Explore Maintenance Plans
  • Two seasonal visitsSpring and fall, on the calendar for you
    2× / yr
  • Repair discountOn qualifying repairs, applied before work begins
    10–15%
  • Priority serviceElite members move to the front of the schedule
    Elite
Homes and businesses

Residential & Light Commercial Heating Repair Across Northeast Florida.

Mighty Air repairs heating systems for homes and light commercial properties throughout Jacksonville, Orange Park, St. Johns, St. Augustine, and nearby communities.

Schedule Heating Repair Read Our Reviews
Recent work

Recent Mighty Air Heating Repairs

See real heating and heat pump repairs our team has completed across Jacksonville and Northeast Florida.

Heat strip and sequencer repair in Jacksonville
JacksonvilleHeat Strip Repair
Defrost control board replacement in Orange Park
Orange ParkDefrost Control Repair
Reversing valve repair in St. Johns
St. JohnsReversing Valve Repair
Thermostat replacement restoring heat in St. Augustine
St. AugustineThermostat Replacement
Heating repair questions

Heating Repair FAQs

Quick answers to the questions Jacksonville homeowners ask us most when the heat isn't working.

Have a question that isn't here? Call (904) 292-0636 and tell us what's happening.

Schedule Heating Repair
Why is my heat pump blowing cold air?

Air from a heat pump can feel less warm than furnace heat, which is normal. Persistent cold air can point to a thermostat, defrost, reversing valve, refrigerant, or auxiliary heat problem that should be inspected.

Why won't my heat pump switch to heat?

Problems with the thermostat, reversing valve, electrical controls, or refrigerant system can keep a heat pump from heating. A technician can test the system and find the cause.

Why is my auxiliary heat running all the time?

Auxiliary heat should only run when the heat pump needs extra help. If it runs constantly, the heat pump may not be producing enough heat on its own.

Is it worth repairing an older heating system?

It can be. Age alone doesn't decide it. The equipment's condition, repair cost, parts availability, and repair history all matter.

Do you repair heating systems for businesses?

Yes. Mighty Air provides heating repair for residential and light commercial properties in Jacksonville and surrounding areas.

More heating servicesHeat Pumps Heating Replacement & Installation Thermostats HVAC Parts Repair Emergency HVAC Maintenance Plans All Heating Services
Schedule heating repair

Schedule Heating Repair in Jacksonville

Most no-heat calls in Northeast Florida come down to a part that sat idle all summer: a heat strip element, a sequencer, a defrost board, or a thermostat that stopped talking to the system. We'll find which one, show you what we found, and give you the price before we fix it.

Mighty Air is a family-owned HVAC company serving Jacksonville and Northeast Florida since 2016. Always there when you need us.

Mighty Air HVACJacksonville, Florida

Call Mighty Air, Inc. at (904) 292-0636 to schedule heating repair in Jacksonville, FL, and surrounding areas.

Call (904) 292-0636

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