Are your Heat Pump Repair services available in Miami?

Yes, All Year HVAC provides round-the-clock Heat Pump Repair services directly in Miami, FL.

How much does emergency service cost in Miami?

We offer upfront, transparent pricing with no hidden fees for all service calls in Miami.

Heat Pump Repair in Miami, FL | 24/7 Local Service

Name: All Year HVAC
Telephone: +1-866-805-8548
Price range: $$

800+

Heat Pump Repairs in Miami, FL

Heat Pump Repair Specialists

Heat Pump Failures Are Different From Standard Air Conditioner Problems

A heat pump is fundamentally a more complex system than a straight cooling unit, and diagnosing one correctly requires understanding how it operates in both heating and cooling modes. Many technicians who are competent with central air conditioning lack confidence with heat pump-specific failures, particularly the ones that show up only during the heating season. At All Year HVAC, we have repaired hundreds of heat pumps across Miami, FL, and we approach each diagnostic with the specific vocabulary and testing procedures that heat pump repair actually requires.

The reversing valve is the defining component of any heat pump. This solenoid-controlled valve switches the refrigerant flow direction between heating and cooling modes. A reversing valve that is partially stuck can allow some refrigerant to bypass through the valve in the wrong direction, which shows up as a system that heats weakly, or cools weakly, or alternates between the two in a confusing way. Diagnosing a suspect reversing valve requires measuring suction and discharge pressures in both modes and comparing them against what the system should produce. A valve that is mechanically stuck versus one where the solenoid coil has failed requires a different repair approach, and distinguishing between the two before replacing anything saves time and parts cost.

Defrost cycle issues are another heat pump-specific failure mode that most homeowners have never heard of until their system develops one. In heating mode, the outdoor coil acts as the evaporator and extracts heat from cold outdoor air. When outdoor temperatures drop far enough, frost accumulates on the outdoor coil. The defrost control board triggers a defrost cycle that temporarily reverses the system and melts that frost. When the defrost board, defrost thermostat, or defrost terminator fails, the system either never defrosts and develops an ice block on the outdoor coil, or defrosts too frequently and spends time in reverse mode when it should be heating. We test defrost control components specifically during heat pump diagnostics rather than applying generic HVAC diagnostic procedures that do not address heat pump behavior.

Refrigerant charge in heating mode behaves differently than in cooling mode. Target superheat and subcooling values shift based on outdoor ambient and whether the system is operating in heat or cool mode. A technician who only checks refrigerant charge against cooling mode targets can incorrectly characterize a properly charged heat pump as low when it is actually operating normally for current ambient conditions. We use mode-specific target values when evaluating refrigerant charge on heat pump calls in Miami.

Dual-fuel systems, which pair a heat pump with a gas furnace backup, add the complexity of the changeover lockout temperature. The lockout is the outdoor temperature below which the heat pump stops operating and the gas furnace takes over, because below that threshold the heat pump's COP drops below economic justification. An improperly set lockout temperature causes the system to run gas backup too high (wasting money) or to run the heat pump at very low outdoor temperatures (appropriate for cold-climate units only). We set and verify dual-fuel lockout parameters as part of any repair that touches the thermostat or control system on a dual-fuel setup in Miami.

Heat Pump Repair Services

What We Fix in Miami Heat Pump Systems

Reversing Valve Failure Diagnosis and Repair

The reversing valve is the component that switches a heat pump between heating and cooling mode. When it fails partially, the system may heat and cool simultaneously, heat weakly, or cool weakly depending on which way the valve is stuck. We diagnose reversing valve issues by measuring suction and discharge pressures in both operating modes and comparing them against the expected values. A solenoid coil failure is different from a mechanically stuck valve slug, and we identify which before ordering parts. Reversing valve replacement in Miami is a full-system repair that includes nitrogen pressure testing and refrigerant recharge after component replacement.

Pressure testing in both modes
Solenoid vs. mechanical failure determination
Complete valve replacement
Post-repair refrigerant verification

Defrost Cycle Diagnosis and Repair

Heat pumps in heating mode develop frost on the outdoor coil in cold weather, which is normal. The defrost control system should melt that frost on a timed or demand-triggered cycle and return the system to heating mode. When the defrost board, defrost thermostat, or defrost terminator fails, the coil ices over and the system loses heating capacity progressively until it shuts down. We test each defrost system component individually to identify the failed component accurately rather than replacing all of them by assumption. Defrost board failure is the most common cause, but defrost thermostat positioning and calibration are frequently the actual culprit.

Defrost board testing
Defrost thermostat check
Defrost terminator verification
Coil ice clearance and restart

Refrigerant Charge in Heating Mode

Verifying refrigerant charge in heating mode requires using heating-mode target values for superheat and subcooling, not the same targets used for cooling mode diagnosis. The outdoor coil in heating mode is the evaporator, so suction pressure reflects outdoor ambient temperature and the system's ability to extract heat from cold air. We measure system pressures in heating mode and compare them against manufacturer heating mode targets adjusted for current outdoor temperature. A heat pump operating in the low-temperature range of its rated capacity should show specific pressure values that differ significantly from what the same unit shows on a warm day in cooling mode. Correct refrigerant charge in heating mode is critical for system COP and compressor longevity.

Heating mode pressure measurement
Temperature-adjusted target values
Leak detection when charge is low
Refrigerant addition when indicated

Auxiliary Heat Lockout and Staging

Heat pumps use electric resistance auxiliary heat strips as a backup heat source during defrost cycles and during periods when outdoor temperatures drop below efficient operating range. Auxiliary heat lockout settings, which prevent the strips from energizing above a set outdoor temperature, prevent the strips from competing with the heat pump during normal operation. When these settings are misconfigured, the auxiliary heat runs constantly alongside the heat pump, which dramatically increases electricity consumption. We test auxiliary heat sequencer operation, verify lockout thermostat settings, and check electric resistance strips for element failures and proper amp draw on every heat pump repair call in Miami.

Aux heat sequencer testing
Lockout thermostat verification
Element amp draw check
Staging configuration review

Dual-Fuel System Repair and Coordination

Dual-fuel systems pair a heat pump with a gas furnace and switch between the two based on outdoor temperature and relative operating cost. The changeover logic lives in the thermostat and depends on a correctly set balance point temperature. When the balance point is set too high, the gas furnace runs at temperatures where the heat pump would be more economical. When it is set too low, the heat pump runs at temperatures where its COP has dropped so far that gas backup would cost less. Repairs to dual-fuel systems require understanding both the heat pump and the furnace, and we handle both in-house rather than referring you to separate contractors for the two sides of the system.

Balance point verification and adjustment
Thermostat staging configuration
Changeover logic testing
Furnace and heat pump coordination

Cold Climate Performance Diagnosis

Standard heat pumps are rated for heating capacity at 47 degrees Fahrenheit outdoor temperature. As outdoor temperature drops, heating capacity and COP decline. Cold-climate heat pumps (variable-speed inverter units rated for operation at 5 degrees or lower) behave differently at low temperatures than conventional heat pumps, and diagnosis must account for this. A system that appears to be underperforming may actually be operating normally for current outdoor conditions and the equipment's rated capacity curve. We evaluate cold-weather performance against the unit's specific capacity data rather than against generic heat pump expectations, so the diagnosis reflects reality.

Capacity curve evaluation
Low-temperature COP assessment
Inverter compressor behavior check
Rated vs. actual performance comparison

Why Choose Us

What Makes All Year HVAC the Right Heat Pump Repair Choice in Miami

Heat Pump-Specific Diagnostic Process

We use testing procedures specific to heat pump operation in both modes, not standard air conditioner procedures applied to a different system. This means faster, more accurate diagnosis of reversing valve, defrost, and heating-mode refrigerant issues.

Dual-Fuel System Capability

We service both sides of dual-fuel systems in-house. One contractor, one call, one coordination point for a system that involves both a heat pump and a gas furnace working together.

Heating Mode Refrigerant Expertise

We verify refrigerant charge using heating-mode target values adjusted for outdoor ambient temperature. This prevents the common misdiagnosis of a properly charged heat pump as refrigerant-low based on cooling mode standards.

Cold-Weather Priority Scheduling

A heat pump failure in cold weather is not a routine service call. We offer priority scheduling for heat pump failures during cold weather events in Miami, Miami, FL, because a home without heat in winter is an urgent situation.

Our Process

How We Diagnose Heat Pump Problems in Miami

Mode-Specific Symptom Assessment

We start by determining whether the failure occurs in heating mode, cooling mode, or both, and what specific symptom pattern the homeowner has observed. Heat pump symptoms are often mode-specific and guide the diagnostic path significantly.

Electrical and Control System Check

We test the reversing valve solenoid, defrost control board, auxiliary heat sequencers, and thermostat staging before touching refrigerant. Many heat pump failures are electrical or control-related rather than refrigerant issues.

Pressure and Refrigerant Evaluation

We connect gauges and evaluate system pressures against mode-specific target values adjusted for current outdoor temperature. Refrigerant charge is evaluated in the mode where the problem is occurring, not the opposite mode.

Repair, Verification, and Documentation

We complete the identified repair, verify system operation in both modes, and document findings and repair actions. For dual-fuel systems, we confirm proper changeover operation after any repair affecting the control system.

Customer Reviews

Heat Pump Repair Reviews from Miami Homeowners

★★★★★

"Had two other companies look at my heat pump before calling All Year HVAC. Both said it needed refrigerant and added some without fixing the problem. The All Year HVAC tech diagnosed a reversing valve that was partially stuck and tested it correctly in heating mode to prove it. Fixed the valve and it has worked perfectly since. Wish I had called them first."

David M.

Miami, FL

★★★★★

"My dual-fuel system was running the gas furnace constantly even in mild temperatures. All Year HVAC found the balance point setting was incorrectly set too high by whoever installed the thermostat. A simple recalibration and the system now uses the heat pump where it should and switches to gas when it makes sense. My gas bills dropped noticeably the following month."

Rebecca O.

Miami, FL

★★★★★

"The outdoor coil was completely encased in ice. Previous tech said the refrigerant was low. All Year HVAC identified a failed defrost thermostat that was preventing defrost cycles from initiating. Fixed the defrost component, the ice cleared, and they verified refrigerant charge in heating mode at the correct outdoor ambient. System has worked through the rest of the winter without issue."

Carol W.

Miami, FL

FAQ

Heat Pump Repair Questions for Miami Homeowners

Several causes can produce cold air from a heat pump in heat mode. A reversing valve that is stuck in the cooling position will run the system in cooling mode regardless of thermostat demand, blowing air colder than room temperature in winter. A severely undercharged refrigerant system in heating mode will produce warm but not hot supply air. A defrost cycle in progress will temporarily blow cool air as the system reverses to melt coil frost, which is normal but alarming if you do not know to expect it. Auxiliary heat strip failures leave the system dependent on heat pump capacity alone, which may be insufficient at very low outdoor temperatures. We test all of these scenarios specifically rather than assuming any single cause, because correct diagnosis on a heat pump heating failure requires checking multiple system components.

The reversing valve is a four-way valve that switches refrigerant flow direction between heating and cooling mode. It consists of a slide mechanism controlled by a solenoid coil. When the solenoid is energized (or de-energized, depending on manufacturer), the slide moves and refrigerant flows in the opposite direction. A partially stuck reversing valve allows refrigerant to bypass through the valve body in both directions simultaneously, which produces characteristic symptoms: the system may heat and cool simultaneously, fail to reach setpoint in one or both modes, or produce suction and discharge pressures that do not match the operating mode. Diagnosing a reversing valve properly requires connecting manifold gauges and comparing pressures against expected values in both heating and cooling mode, not just visual inspection or a single pressure reading.

In heating mode, the outdoor coil extracts heat from cold outdoor air. When outdoor temperature drops far enough and the coil surface temperature falls below freezing, frost and then ice accumulate on the coil fins. This is normal and expected. The defrost control board monitors defrost demand based on time and coil temperature and initiates a defrost cycle when needed. During defrost, the system briefly reverses to cooling mode, which melts the ice. The outdoor fan shuts off during defrost to prevent cold air from slowing the process. The system should return to heating mode within ten to fifteen minutes. You should be concerned when the outdoor coil accumulates a solid block of ice rather than a light frost layer, when defrost cycles occur more frequently than every forty-five to ninety minutes, or when the system never appears to defrost at all. All of these indicate a defrost system component failure rather than normal heat pump operation.

The balance point is the outdoor temperature at which the heat pump's cost of operation equals the gas furnace's cost of operation. Above the balance point, the heat pump is the economical choice because its COP (coefficient of performance) is high enough to produce more heat per dollar than burning gas. Below the balance point, the heat pump's COP has declined enough that gas backup becomes the economical choice. The balance point temperature depends on your local electricity rate, gas rate, and your specific heat pump's efficiency curve. A dual-fuel thermostat that is set with the balance point too high runs the gas furnace at temperatures where the heat pump would cost less. Too low, and the heat pump runs at temperatures where it is less economical than gas. We calculate and set the correct balance point based on your actual utility rates during any dual-fuel repair or service call in Miami.

Heat pumps run longer cycles than gas furnaces, and this is largely normal. A gas furnace produces supply air in the 120 to 140 degree Fahrenheit range, which heats a space quickly and allows shorter cycles. A heat pump in heating mode typically produces supply air in the 90 to 105 degree Fahrenheit range, which is comfortable but requires longer runtime to satisfy the thermostat setpoint. This is not a malfunction. However, a heat pump that runs continuously without satisfying setpoint, or that produces supply air significantly cooler than expected for current outdoor conditions, may indicate refrigerant undercharge, a defrost system issue causing excessive ice buildup, or a capacity mismatch between the equipment and the home's heat loss. The difference between normal long runtime and a system problem requires measuring supply air temperature and comparing it against expected performance for current outdoor ambient temperature.

Auxiliary heat strips should energize during defrost cycles and when outdoor temperature drops below the system's lockout setting. Many thermostats display an "Aux Heat" or "Emergency Heat" indicator when auxiliary strips are active. If auxiliary heat never comes on during a cold weather period in Miami, FL when outdoor temperature has dropped significantly, the sequencers or the strips themselves may have failed. If auxiliary heat runs continuously at all outdoor temperatures including mild ones, the lockout thermostat setting may be incorrect or the heat pump itself may not be producing sufficient heating capacity, causing the control system to call for backup heat constantly. We test auxiliary heat strip amp draw against rated current, verify sequencer operation, and check lockout settings on every heat pump heating service call in Miami.

Coverage Area

Heat Pump Repair Throughout Miami and Miami, FL

Our heat pump repair technicians serve Miami and surrounding communities throughout Miami, FL. We offer priority scheduling for heating system failures during cold weather periods, because a home without heat in winter is an urgent problem.

Call us any day of the week for heat pump repair service in Miami. We carry common heat pump components including reversing valves, defrost boards, capacitors, and contactor assemblies to reduce repair time on first visits.

Call for Priority Service: +1-866-805-8548

Miami (/maɪˈæmi/ my-AM-ee), officially the City of Miami, is a coastal metropolis and the seat of Miami-Dade County in South Florida. With a population of 442,241 as of the 2020 census, it is the second-most populous city in the state of Florida after Jacksonville. It is the core of the much larger Miami metropolitan area, which, with a population of 6.14 million, is the third-largest metro in the Southeast and ninth-largest in the United States. The city has the third-largest skyline in the U.S. with over 300 high-rises, 58 of which exceed 491 ft (150 m).