Electric bill suddenly high
Electric bill suddenly high in Winter Springs, Florida
If a Winter Springs electric bill jumps in winter, the usual answer is electric strip heat — the standard build in the 51.2% of the city built 1970 to 1989 — and resistance heat costs several times what a heat pump does. A summer jump is more often a failing capacitor, a dirty coil or duct leakage into the attic. The bill is Duke Energy’s.
Diagnosis
What is most likely wrong
| # | Cause | How common | What it looks like |
|---|---|---|---|
| 1 | Electric strip heat running | Very common in winter | A January bill unlike any other month. Resistance heat is 100% efficient and no better. |
| 2 | Dirty condenser coil or blocked filter | Very common in summer | The system runs longer for the same result. |
| 3 | Duct leakage into a hot attic | Common | Conditioned air paid for and lost; one room that never keeps up. |
| 4 | Low refrigerant charge | Common | Longer run times, less cooling per hour. |
| 5 | Failing capacitor or compressor drawing high current | Common | Often the last warning before a failure. |
| 6 | Heat pump stuck on auxiliary heat | Less common | A failed reversing valve or defrost board leaves the strips carrying the load. |
| 7 | Pool pump schedule or a billing-period change | Less common | Check the days in the period, and whether the pool timer was reset to 24 hours. |
Before you call
What you can safely check yourself
- Compare like with like: the same month last year and the number of days in the billing period, not last month.
- Thermostat left on ‘emergency heat’ or ‘aux heat’?
- Filter, and the outdoor coil.
- Is the system running far longer than it used to for the same setting?
- On a pool home, check the pump timer. A pump running 24 hours is a bill jump that has nothing to do with the AC.
Where the licensed line is
Refrigerant, capacitors and the inside of an electrical panel are not homeowner jobs. A run capacitor holds a lethal charge after the disconnect is pulled. Refrigerant handling requires EPA Section 608 certification. And in Florida the work itself is regulated: an air-conditioning contractor licensed under Chapter 489 may replace, disconnect and reconnect the power wiring at the dedicated disconnect, and repair or replace breakers and fuses on dedicated HVAC circuits — s. 489.105(3). Verify any Florida contractor's licence at the DBPR licensee search before work begins.
In Winter Springs
Why this happens in this housing stock
This is the Winter Springs page. 51.2% of the city’s 13,297 improved residential parcels were built 1970–89, and that era built straight-cool condensers with electric resistance strip heat in the air handler as standard, because Central Florida runs about seven cooling degree days for every heating one and the builders were not paying for a heat pump to cover the eighth. Winter Springs is fourth of seven Seminole County cities on that share — Altamonte Springs, Longwood and Casselberry are higher — but the parcel file names the streets here: Winter Springs Unit 4, Wildwood, Wedgewood Tennis Villas, Oak Forest Unit 6, Tuscawilla Units 14A and 14B.
How to check yours in thirty seconds: if the thermostat has an “emergency heat” or “aux heat” setting that is the only heat, and the panel has a large double-pole breaker feeding the indoor air handler as well as the condenser’s own breaker, you are almost certainly on electric strip heat.
Forty years later the condenser has been replaced three or four times — usually with another straight-cool condenser — and the strip heat is still there. The fix is a heat pump conversion, and it is the one Duke Energy pays the most for: up to $1,000 as published. The catch is the order of operations — the free Home Energy Check has to happen first. What converting actually changes and the rebate tiers with their caveats.
Source: Seminole County Property Appraiser CAMA extract, files dated 5 September 2026. Improved residential parcels (single-family, townhome and condominium; DOR codes 01xx and 04xx) in tax districts W1 and W2.
Cost
What the fix typically costs
| Job | Researched range | What drives it |
|---|---|---|
| Diagnostic visit | $70–$200 | Usually credited. |
| Capacitor replacement | $150–$400 | A weak capacitor raises running current. |
| Duct sealing or replacement | $500–$8,000 | Duke publishes up to $450 back on the test and repair. |
| Attic insulation | Duke rebate up to $800 | Not a repair, but the cheapest bill reduction in 1970s stock. |
| Heat pump conversion, 3 ton | $6,000–$9,500 | Less up to $1,000 published rebate on a strip-heat house. |
Researched ranges from HomeGuide, HVAC Calculator Hub and This Old House (national, updated 16 March 2026), checked September 2026. Not our prices.
Read this before you use any number on this page
These are researched market ranges, not our prices and not a quote. The dollar figures come from published third-party cost guides — named and linked at the foot of the page — plus one figure that is not a range at all: the City of Winter Springs’ own published mechanical permit fee. They are here so you can tell whether a quote you have been handed is in the ordinary range for this work. No two houses in Winter Springs cost the same to do, and we do not quote a job before we have seen it.
The order matters
Duke Energy requires a free Home Energy Check completed within the previous 24 months, before the equipment is installed. Replace first and apply afterwards and the claim is denied. For an emergency replacement Duke allows the Check within 12 months after installation instead — the only route back once a compressor has already failed.
- Home Energy Check first. Free, from Duke.
- Then the recommendation it produces.
- Then the permitted install by a licensed contractor of your choosing.
- Then the application, through Duke’s Florida portal.
Duke Energy Florida Home Energy Improvement prerequisites. Rebate questions 800.254.8535.
Strip heat
On strip heat and tired of the January bill?
Book the free Home Energy Check before you get quotes. Doing it afterwards forfeits the rebate entirely.
Sources
Where the facts on this page come from
Every figure above is either a primary-source document or a named third-party cost guide, and all of it was checked in September 2026. Fee schedules, rebate amounts and market prices change without notice — if you are about to spend money on one of these numbers, open the source and check it.
- Duke Energy Florida, Home Energy Improvement HVAC replacement
- Duke Energy Florida, Home Energy Improvement prerequisites
- NOAA NCEI 1991–2020 climate normals, annual cooling and heating degree days, Orlando International and Orlando Executive
- Seminole County Property Appraiser
- This Old House, air conditioner repair cost guide (national, updated 16 March 2026)
- Smart Home Air & Heat, new AC unit cost in Orlando (a local contractor’s own guide — read as one operator’s view)