- About
- Air Conditioning
- Generators
-
Heating
-
Air Quality
-
Service Areas
- Call 24/7: (386) 361-5500
- Search Site
Heat pump and auxiliary electric heat replacement, sized by load calculation rather than by matching the old unit. In Florida, wrong sizing does not present as a fault. It presents as auxiliary heat running when it should not, and it lands on your winter bill.
The Straight Answer
Heating replacement is usually the better answer once a heat pump reaches twelve to fifteen years, reversing valve failures start repeating, heat strips burn out frequently, or the system struggles to switch into heating mode at all. Past that point repairs stop restoring reliable performance and start renting it back to you a season at a time.
The sizing point matters more here than most people expect. Oversized or undersized equipment increases auxiliary heat usage, reduces efficiency and shortens system life, and auxiliary electric heat is the expensive way to warm a building. So a badly sized heat pump does not announce itself as a sizing error. It announces itself as a winter energy bill, which is a much harder thing to trace back.
That is why the load calculation is the first thing we do rather than a formality at the end, and why we would rather diagnose a system properly before quoting to replace it. Plenty of heating faults are repairable on equipment that has years left.
Signals It Is Time
One of these on its own is rarely decisive. Two or three together usually are.
Age alone is not a reason to replace a working system, but it changes the arithmetic on every subsequent repair, because you are investing into equipment with limited life remaining.
Reversing valve failures happening more than once. It is the component that makes heating possible on a heat pump, and repeated failure signals the system is past its reliable life.
Corroded connections and contactors, which coastal East Central Florida accelerates considerably. Corroded electrics fail unpredictably and then keep on failing elsewhere.
The deciding signal. When a repair no longer restores reliable performance for a full season, you have stopped buying a fix and started renting one.
Reading Your Own System
How often the strips engage is the most useful diagnostic you have, and you can observe it without us.
| What You Notice | What it usually means | What actually fixes it |
|---|---|---|
| Aux runs on mild mornings | Staging set too aggressively, rather than an equipment problem | Reconfigure the staging. Resize only if staging is already correct |
| Aux runs constantly all winter | Equipment genuinely undersized for the building | Load calculation and a correctly sized replacement |
| Heat strips burning out repeatedly | The system has been leaning on aux far harder than designed | Find the underlying cause. Replacing strips alone repeats the failure |
| Winter bill climbing, same weather | Heat pump capacity degrading, so aux quietly picks up the slack | Diagnose the heat pump before assuming the whole system is finished |
| Cooling fine, heating weak | Charge or reversing valve, not sizing and not age | A repair. This one is rarely a replacement conversation at all |
How We Work
Two of these five steps happen before any equipment is ordered, which is deliberate.
Equipment sized to the building rather than matched to whatever was there before. Getting this wrong is what drives auxiliary heat usage and shortens equipment life, and it is not recoverable afterwards.
Verified before anything is ordered, because a new outdoor unit paired with an incompatible or undersized air handler underperforms from day one, and the shortfall gets blamed on the new equipment.
Existing equipment removed with the electrical and mounting condition assessed as it comes out, then the new heat pump installed with auxiliary heat integration and any connection upgrades it requires.
Thermostat configured and communication tested, then auxiliary heat staging set and verified, so the strips engage only when the heat pump genuinely needs the help rather than whenever the thermostat gets impatient.
Full startup and performance testing across cooling and heating, with airflow balance confirmed before the job is called finished. A system that passes in one mode can still fail in the other.
Common Questions
Typically at twelve to fifteen years or older, and sooner if reversing valve failures repeat, heat strips burn out frequently, the system struggles to switch into heating mode, or electrical corrosion has taken hold.
The deciding factor is whether repairs still restore reliable performance. Once they stop doing that, replacement is the cheaper path. Before that point it usually is not, and we will say so.
Because on a heat pump, wrong sizing shows up as auxiliary electric heat running when it should not. Aux heat is the expensive way to warm a building, so an incorrectly sized system quietly raises your winter bills rather than announcing a fault.
Oversizing or undersizing also reduces efficiency and shortens equipment life, which is why we calculate the load instead of reading the label on the old unit.
It is the logic that decides when electric heat strips assist the heat pump. Configured correctly, aux heat engages only when the heat pump genuinely cannot keep up on a cold morning.
Configured badly it engages far too readily and you pay for resistance heat you did not need. Verifying that staging is part of every installation we do, and it is a common thing to find set wrong on existing systems that were installed by someone else.
Not always, but compatibility has to be verified rather than assumed. A new high-efficiency outdoor unit paired with an incompatible or undersized air handler underperforms from the first day.
The frustrating part is that the shortfall then gets blamed on the new equipment. We check this before ordering anything, so the answer is known while it is still a choice.
Before the cold fronts arrive. Heating faults in Florida surface the first time the system is asked for heat after months idle, which means everyone discovers them in the same few days.
A planned replacement in a quiet month is a very different experience, and a different price, from an urgent one during a cold snap when every diary in the region is full.
Yes. Salt air accelerates electrical and cabinet corrosion, so equipment near the Atlantic in Ormond Beach, Daytona Beach Shores, Ponce Inlet and Flagler Beach often reaches the end of dependable service earlier than equipment inland around DeLand, Deltona or Sanford.
Corroded connections fail unpredictably, which is a poor property for a heating system to have on the one week of the year you need it.
Connected Services
Three of these are worth reading before you commit to anything on this page.
Many faults are repairable on equipment with years left. Diagnostics before a replacement conversation.
View Heating RepairIf the complaint is uneven rooms, new equipment behind restricted duct will deliver exactly the same result.
View DuctworkWhere aux heat staging actually lives, and the cheapest thing on this page to get wrong or right.
View ThermostatsThe equipment most East Central Florida properties actually install, in fuller detail.
View Heat Pump InstallationDual-mode diagnostics, including the reversing valve faults that look like end of life but are not.
View Heat Pump RepairThe other answer to rooms that never hold the same temperature as the rest of the building.
View ZoningProtects the new system's warranty from day one and keeps the documented history a claim needs.
View Service PlansThe full range of Total Comfort heating work in one place.
View Heating ServicesWhere We Serve
Heating Installation And Replacement
Licensed since 1976 under Florida CAC029376. Load calculated, air handler compatibility verified, auxiliary heat staging checked, both modes tested before handover.
From emergency AC repairs and refrigerant leak detection to full HVAC system replacement, ductwork installation, heat pump service, and indoor air quality solutions, our HVAC technicians are ready to respond.
If you are experiencing no cooling, system failure, electrical issues, or AC leaks, call now for priority dispatch at 386-361-5500.
Total Comfort HVAC has proudly served residential
and commercial clients since 1976. Headquartered
in Ormond Beach, our insured technicians provide reliable
heating and cooling services, including
AC repair, installation, maintenance, indoor air quality solutions,
and 24/7 emergency HVAC service throughout East Central Florida.
License # CAC029376
