When half your house has no power and no breaker has tripped, the problem is almost never inside your panel. It’s upstream of it. Your home runs on two 120-volt legs of incoming power, and when one of them fails, every circuit fed by that leg goes dead while the other half of the house keeps working normally. That failure happens at the service equipment outside, at the main lugs, or at the neutral, and in Tampa Bay it’s usually corrosion or storm damage that caused it. The fastest way to lose money on this is to keep flipping breakers that were never the problem.
Why does half my house have no power?
Three things cause it, and they’re easy to tell apart once you know what to look for.
A lost service leg. Power arrives at your home as two separate 120-volt legs. Your 120-volt outlets and lights are split between them, and your 240-volt appliances use both. Lose one leg and roughly half your outlets die at once, in no particular pattern, while the rest of the house is fine. The tell is your big appliances: the range, dryer, water heater, or air handler will act strange or refuse to start, because they need both legs to work.
An open or loose neutral. This one looks similar at first and is far more dangerous. Instead of half the house simply going dead, the voltage starts swinging. Lights on one side of the house get noticeably brighter while lights on the other side dim, and the brightness shifts as appliances turn on and off. That’s not a nuisance. Overvoltage on a 120-volt circuit destroys electronics and motors, and it can do it in minutes.
A failed main breaker or corroded main lug. The connections where the incoming wires land in your panel carry every amp your home uses. When one of those connections corrodes or loosens, it heats up and eventually stops passing current on that side. Salt air on the coast and year-round humidity inland both accelerate this, which is why service equipment in Tampa Bay tends to age faster than the same gear in a dry climate.
What none of these are is a tripped breaker. A breaker protects one circuit, so a trip takes out one room or one appliance. If you’re looking at half a house, and the breakers all appear to be in the ON position, you’re looking at a service problem. If a single circuit is out instead, why a breaker keeps tripping is the more useful place to start.
What should you do right now?
Work through this before you call anyone. It takes about five minutes and it changes what you tell the electrician.
- Check whether your neighbors have power. If the whole street is dark, it’s an outage and there’s nothing at your house to fix.
- Look at your main breaker and your individual breakers. Note whether anything is actually tripped, or whether they all read ON.
- Notice what still works. Write down which rooms and which appliances are dead. That list is the diagnostic.
- Watch your lights for a minute. If they’re brightening and dimming as things switch on, treat it as urgent.
- If you see the lights swinging, turn the main breaker off. An open neutral is the one failure here where leaving the power on actively destroys equipment.
- Look at the outside of the house. If the pipe running down to your meter is pulled loose, bent, or hanging off the wall, say so when you call.
Don’t keep resetting breakers that aren’t tripped, and don’t pull the meter yourself. The meter belongs to the utility, and the connections behind it stay energized even when your main breaker is off.
Is it your problem or the power company’s?
This is where most homeowners lose a day, and it’s worth knowing before a storm rather than during one. The dividing line runs through the equipment on the outside wall of your house, and you own more of it than most people expect.
Tampa Electric defines the pieces this way. The weatherhead is the rounded pipe on your roof that receives the service lines. The riser is the pipe that contains those service lines and connects your weatherhead down to your meter box. The meter box is where your meter is mounted, and it encases the cable connection running to your breaker panel. All three are the customer’s responsibility to repair.
What the utility handles is narrower than people assume: the service line that carries electricity from the neighborhood pole to your home, and the electric meter itself. Duke Energy Florida draws the same line for its customers, holding the homeowner responsible for the weatherhead, riser, meter box, and the attachment hardware, and noting that these are normally installed and maintained by a licensed electrician.
So if the wire from the pole is down, that’s a utility call and a utility repair. If the pipe, the weatherhead, or the meter box is damaged, the utility will not fix it, and in most cases cannot restore your power until you do. That work needs a licensed electrician, and Duke Energy notes that a county electrical inspection may be required before service can be reconnected. In practice that means the order of operations is electrician first, inspection second, utility reconnect third. Calling the utility repeatedly does not move that sequence along.
Which utility actually serves your address?
Your county does not reliably tell you your electric utility, and this trips up plenty of otherwise good advice. Tampa Electric’s service area covers Hillsborough County plus parts of Pasco, Pinellas, and Polk. Duke Energy Florida covers significant portions of Pinellas and Pasco. Parts of Pasco are served by Withlacoochee River Electric Cooperative instead. The boundaries overlap and they don’t follow county lines.
The practical version: check the name on your electric bill before you need it, and save that outage number in your phone. A homeowner in Palm Harbor and a homeowner in Brandon are often calling two different companies about the identical problem, and the wrong call on a storm day costs hours.
Why does this happen so often in Tampa Bay?
Two local conditions do most of the damage here.
Salt air and humidity corrode the connection points inside outdoor service equipment. Meter boxes, weatherheads, and exterior disconnects on homes near the water take the worst of it, and corrosion at a connection creates resistance, resistance creates heat, and heat eventually opens the connection. That’s the slow version of this failure, and it shows up as intermittent problems before it becomes a dead half-house.
Storms do the fast version. Wind on a service line pulls against the weatherhead and the riser, and a falling limb can bend or detach the whole assembly from the wall. Lightning is the other factor, since Tampa Bay takes more strikes than nearly anywhere else in the country, and a nearby strike stresses connections without leaving anything obvious to see. If your service equipment is decades old, whole-house surge protection protects what’s downstream of it, though it won’t hold a corroded lug together.
If you’re already tracking other symptoms around the house, the warning signs of an electrical problem are worth reading alongside this, because a partial outage rarely arrives without some earlier hints.
Is this an emergency?
Treat it as one if any of these are true: the lights are brightening and dimming, anything smells hot or burnt, the meter box or riser is visibly damaged or pulled away from the wall, or you can hear buzzing or crackling at the panel. Those get an emergency electrician the same day.
If half the house is simply dead, nothing is swinging, and nothing smells or sounds wrong, it’s urgent but not a middle-of-the-night call. It won’t fix itself, though, and it usually gets worse rather than better, because the underlying connection keeps heating each time load comes back on.
What does it cost to fix?
It depends entirely on which of the three failures you have, and any electrician quoting a firm price before looking at it is guessing. What’s predictable is the front end: a diagnostic visit in Tampa Bay generally runs $75 to $150, and it’s usually credited toward the repair.
From there the range is wide. Tightening or replacing a corroded connection at the panel is a modest repair. Replacing a damaged weatherhead, riser, or meter box is a bigger one, because it involves a permit, an inspection, and coordination with the utility to disconnect and reconnect. And if the inspection reveals that the service itself is undersized or the panel is obsolete, you’re in panel upgrade territory, which runs roughly $2,400 to $4,500 in this market depending on the condition of the service mast and whether grounding needs to be brought up to current code. Our full breakdown of what electricians cost in Tampa Bay covers how those numbers are built.
One thing worth deciding before hurricane season rather than during it: if losing power is a genuine problem for your household, a whole-home generator is the piece that keeps the house running while a service repair works its way through permitting and utility scheduling.
Frequently asked questions
Can a tripped breaker cause half the house to lose power?
Not usually. A branch breaker protects one circuit, so tripping it takes out one room or one appliance, not half a house. The exception is a double-pole breaker feeding a subpanel, which can darken a whole section at once. If every breaker reads ON and half the house is dead, the cause is almost certainly upstream at the service equipment or the main lugs.
Is it safe to leave the power on if half my house is out?
Only if the voltage is steady. If lights are brightening on one side of the house and dimming on the other, that’s an open neutral, and leaving it energized can damage electronics and motors quickly. Turn the main breaker off and call. If nothing is flickering and nothing smells hot, it’s generally safe to leave on while you schedule a visit.
Who repairs the weatherhead and meter box, me or the utility?
You do, through a licensed electrician. Tampa Electric lists the weatherhead, the riser, and the meter box as customer responsibilities, and Duke Energy Florida draws the same line. The utility owns the service line from the pole and the meter itself. Your power typically stays off until your repairs are done and inspected. On a manufactured home the equivalent customer-side equipment is the pedestal beside the home, covered in mobile home electrical.
Will the power company reconnect me right after the repair?
Not automatically. Duke Energy notes that a county electrical inspection may be required before service is reconnected, so the sequence is electrician, then inspection, then utility reconnect. Your electrician normally pulls the permit and schedules the inspection as part of the job, which is the part that determines how fast you get power back.
Why did this happen right after a storm?
Wind pulls the service line against the weatherhead and riser, and that stress can bend the pipe, loosen the connections, or tear the assembly off the wall. Water intrusion and salt air finish the job on connections that were already corroding. Storm season is when a marginal connection that has been degrading for years finally opens.
Can I just use extension cords from the working side of the house?
For a lamp or a phone charger for a few hours, that’s a stopgap. It is not a fix, and it should never run a refrigerator, a window air conditioner, a space heater, or anything with a motor through a household extension cord. More importantly, if the cause is an open neutral, the working half of your house is the half that’s being overvolted, so running more load there is the wrong direction.
Get the service checked before it takes the other half
A partial outage is your service equipment telling you a connection has failed. It doesn’t recover on its own, and the same corrosion or storm damage that opened one leg is usually working on the other. The right first move is having someone trace it from the weatherhead to the panel and tell you plainly which side of the meter the problem sits on, because that single answer decides whether you’re calling an electrician or a utility. Tampa Electrical Pro connects homeowners with licensed electricians across Hillsborough, Pinellas, and Pasco counties, with true 24/7 emergency coverage for the failures that can’t wait until morning.