Residential Heat Pump Repair in Lutz, Florida

Lutz has no city hall: Hillsborough County is the building department

No city government runs Lutz. The Census Bureau describes census-designated places as statistical geography representing closely settled, unincorporated communities. Its Florida place file lists Lutz as a CDP. The Census Bureau's address geocoder places the county's Lutz Community Center, at 98 1st Avenue NW, in the Lutz CDP and in Hillsborough County, with no incorporated city.

For a Lutz home in Hillsborough County, that makes Hillsborough County Development Services your building department. The county says Development Services provides customer service for development and construction practices within Hillsborough County. Its call center is (813) 272-5600, at County Center, 601 E. Kennedy Blvd. in Tampa. Permit applications go through the county's online portal, HillsGovHub.

The county also keeps a separate plan for the area. Plan Hillsborough lists the Lutz Community Plan among its adopted community plans. It describes a community plan as an extension and refinement of the county's Comprehensive Plan.

If your property record shows a different county, that county's building office applies instead.

What Hillsborough County permit rules mean for a heat pump repair

A repair that swaps one failed part is treated differently from new equipment. Hillsborough County's list of work exempt from permits includes replacement of any part that does not alter its approval or make it unsafe.

Replacing the equipment itself is a different job. The county lists replacement or relocation of mechanical equipment under repairs that are not considered minor and do require a permit.

Florida House Bill 803 exempts some lower-value non-structural work on a single-family residence from a permit. Hillsborough County says that exemption does not apply when the work includes mechanical work. It also does not apply when the property is partly or entirely in a flood hazard area.

Under its emergency repairs heading, the county says that if you have to replace equipment in an emergency, you can submit the permit application within the next working business day. Before any replacement, ask your contractor which category the job falls in.

One machine that runs in two directions

A heat pump moves heat instead of making it. The Department of Energy's Building America Solution Center says heat pumps take heat out of outdoor air to heat a home in winter. In summer they pull heat out of the home and discharge it outdoors. A part called a reversing valve lets the system reverse that cycle.

Because one machine does both jobs, the symptom you describe tells a technician where to start. Carrier, a heat pump manufacturer, says a heat pump that cools normally but fails to heat can have a malfunctioning or stuck reversing valve. It also says the system may fail to switch between heating and cooling when the thermostat commands it. Carrier calls reversing valve problems not DIY repairs, because they involve refrigerant handling.

The same DOE source says all-electric air-source heat pumps come with electric resistance strip heaters for extra heat when needed. It says a backup heat source is often needed because heating efficiency drops at low outdoor temperatures.

A Lutz winter: a few cold mornings

These numbers are NOAA's 1991-2020 normals from Tampa International Airport. That station is not in Lutz, so read them as regional averages, not a forecast for your street.

The normal January low at the airport is 52.8°F, against a normal January high of 71.3°F. January averages 3.8 nights at or below 40°F, February 1.5 and December 1.6. Nights at or below freezing average 0.5 in January and 0.1 in both February and December.

Frost on the outdoor unit on one of those mornings is not always a fault. A homeowner guide from the Center for Energy and Environment, hosted by the Department of Energy, explains what happens. When outdoor coils drop below 32°F, condensation freezes on them and forms frost. The heat pump periodically enters a defrost cycle that switches it to cooling mode and melts the ice with warm refrigerant. Fans might stop or slow, and defrost typically takes 5 to 15 minutes. The guide says that if the heat pump is stuck in defrost or covered in ice, consult an HVAC professional. Defrost water drips at the outdoor unit, so make sure it does not pool and refreeze on a walkway.

Aux Heat and your Tampa Electric bill

A Florida Public Service Commission order states that Tampa Electric serves retail customers in Hillsborough County. The name on your bill confirms which company serves your address.

Tampa Electric's customer guide for its Energy Planner thermostat explains the Aux Heat setting. It says Aux Heat turns off the heat pump compressor, the pump that moves refrigerant, and turns on the backup heating system, normally electric strip or resistance heat. The guide says Aux Heat comes on automatically when it is very cold outside, usually below freezing, and the compressor cannot hold the set temperature. It adds that auxiliary heat is typically switched on by hand when the outdoor unit is not working properly.

In January 2026, Tampa Electric told heat pump owners to adjust the temperature only two degrees at a time to avoid activating the supplemental heat strip. The CEE homeowner guide calls auxiliary heating mode costly and inefficient. It lists Aux Heat constantly displayed on the thermostat as a sign the heat pump is not working properly.

Summer heat, humidity and the cooling side

At Tampa International Airport, NOAA's normal daily high is 90.5°F in June, 91.0°F in July, 91.2°F in August and 90.2°F in September.

Cooling also means removing water. The CEE guide says that as the heat pump cools the indoor air, it pulls moisture from that air. The water drains away through the condensate line, a small pipe that should stay clear and drain to a safe spot. The same guide lists high humidity in the house, frozen indoor or outdoor coils, and a unit that cycles off and on often as signs of a problem. It says to contact a qualified HVAC professional if you notice any of them.

A damp house is not always a broken heat pump. The DOE Building America Solution Center says that in humid and mild climates, homeowners can consider adding a dehumidifier for indoor humidity control in the shoulder seasons. A technician should prove the heat pump is working before anyone treats humidity as a separate problem.

Safe checks, then a licensed technician

Three checks are safe for any homeowner, and none of them needs tools or open panels.

1. Air filter. The CEE guide says a dirty filter strains the system. Check it, and replace or clean it on the interval the maker recommends.
2. Thermostat settings. Confirm it is on Heat in winter or Cool in summer, with the fan on Auto. The CEE guide recommends those modes over the Auto temperature mode, which switches between heating and cooling.
3. Vents, returns and the outdoor unit. Move furniture and clutter off supply vents and return grilles. Clear leaves and debris away from the outdoor unit, and do not cover it in winter.

Stop there. If a breaker has tripped, leave it off and call a licensed contractor. Do not open the outdoor unit's panels, touch the capacitor or wiring, or add refrigerant, the fluid that carries heat in and out of the house.

The CEE guide lists what a heat pump service technician should be able to do. That includes checking the refrigerant charge and looking for leaks, verifying airflow, cleaning both coils and the condensate pan, and inspecting electric terminals. It also includes checking that supplemental heat comes on only when necessary. The EPA requires technicians who maintain, service, repair or dispose of equipment that could release ozone-depleting refrigerants to be certified under Section 608 of the Clean Air Act.

Blume has EPA Section 608 certified technicians. You get a written, upfront price before any work, with repair and replacement numbers side by side, and no equipment sold a house does not need. If replacement is the answer, the new system is sized with an ACCA Manual J load calculation, a room-by-room estimate of heating and cooling needs, and Manual S equipment selection. Blume offers financing through Synchrony Bank.