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Partial Power Loss in Home

Partial power loss — where some outlets work and others don't, or where 240V loads aren't running at full power — usually indicates a broken neutral, a hidden breaker trip, or a single-leg service failure. A broken neutral in particular is dangerous: it lets line voltage swing far above or below 120V, damaging every electronic device in the affected part of the home within seconds.

Damaged and cracked electrical panel of the kind that frequently causes partial power loss to circuits or rooms

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Common Symptoms

Some outlets or rooms have no power while others still work
Lights are dim or flickering in part of the house
Major appliances (HVAC, refrigerator, well pump) won't run at full power
120V loads work but 240V loads (dryer, range, EV charger) don't
Power dropped suddenly without a tripped breaker visible

Common Causes

Broken neutral wire at the panel, meter, or service entrance — produces uneven voltage between the two 120V legs
A tripped breaker that's not obviously in the OFF position (sit just slightly off the ON detent)
Multi-wire branch circuit (MWBC) where one leg has failed
Loose service-entrance lug at the main panel or meter base
Utility-side single-leg outage from a damaged drop wire or transformer fault
Burned or corroded panel busbar contact at a specific breaker slot

Safe DIY Checks

These checks are safe for homeowners to perform before calling an electrician:

Check every breaker in the panel — push each firmly to OFF, then back to ON. Trips can sit in a middle position that looks ON.
Compare voltage at a working outlet vs. a dead outlet using a multimeter (do not do this if you're uncomfortable around live electricity)
Check Dominion Energy's outage map (outagemap.dominionenergy.com) to confirm the utility isn't reporting a neighborhood event
If only large 240V appliances are affected, suspect a broken-neutral or single-leg failure — turn off the main breaker and call immediately
Look at the meter — flickering or unusual digital readout may indicate a service-side issue
Do NOT keep flipping the main breaker repeatedly trying to restore power

When to Call an Electrician

Call a licensed electrician immediately if:

Immediately if 240V loads (dryer, range, HVAC, EV charger) are not running at full power — a broken neutral can damage every plugged-in electronic in the house
Within hours if a specific room or branch has lost power and the breaker for that circuit appears ON
Same-day if voltage readings between phases are unbalanced (normal is 120V each, ±5V)
Immediately if you see scorching, smell burning, or hear humming from the panel or meter

Understanding This Problem

Partial power loss is one of the most underdiagnosed serious electrical problems. Unlike a complete outage (which is obviously a utility or whole-house issue), partial power loss is often dismissed as "just a tripped breaker" — but when the breakers all read ON and only some circuits work, the cause is almost always more serious.

The most dangerous cause is a broken neutral. In a standard residential 120/240V split-phase service, the neutral wire is the reference point that keeps both 120V legs balanced. When the neutral connection breaks (at the meter base, at the main panel lug, or out at the utility transformer), the two 120V phases stop being balanced. Loads on one phase can suddenly see 150V, 180V, or higher — destroying refrigerators, HVAC control boards, smart-home hubs, computers, and TVs within seconds. The other phase drops to 60V or 80V, which won't run anything but also won't immediately fail visibly.

If you suspect a broken neutral, the safe move is to shut off the main breaker immediately and call. Do not flip breakers trying to "find" the problem — every minute the imbalanced voltage runs, more devices die.

The second most common cause is a hidden breaker trip. Modern breakers can trip and sit in a position that looks identical to ON — there's only a tiny detent difference. The fix is to firmly push the breaker to the full OFF position, hear the click, then push it firmly back to ON. If it springs back to OFF, the underlying overload or fault is still present and a professional needs to diagnose.

Third is a damaged multi-wire branch circuit (MWBC). MWBCs share a neutral between two circuits to save wire. If the shared neutral breaks anywhere along the run, both circuits act erratically — sometimes one works, sometimes neither, sometimes both with reduced voltage. MWBCs in older homes (pre-2008) often lack the handle-tied breakers code now requires.

In Northern Virginia, Dominion Energy's grid is reliable, but storm damage to drop wires is common in fall and winter. If a tree limb damages just one of the three wires running from the pole to your meter, you can lose one 120V leg while keeping the other — a textbook partial outage. Dominion's outage map will sometimes flag this; sometimes it won't. When in doubt, call.

Prevention Tips

Have a licensed electrician torque-check the panel and service-entrance connections every 5–7 years

Install whole-house surge protection — utility surges accelerate connection-failure wear

Replace aging meter sockets and service-entrance hardware before they fail (typical lifespan 30–40 years)

Schedule a thermal-imaging inspection of the panel during any other electrical service call

Frequently Asked Questions

Is partial power loss an emergency?

Often yes. If 240V appliances (dryer, range, HVAC, EV charger) aren't running at full power, a broken neutral is the most likely cause — and that can damage every electronic device in the house within minutes. Shut off the main breaker and call us. If only one room or one branch has lost power and the breaker is clearly ON, it's less urgent but still warrants a same-day visit.

Can I fix partial power loss myself?

The only safe DIY step is firmly cycling each breaker (push to full OFF, then back to ON). Anything beyond that — opening the panel cover, testing voltage at the bus, checking the meter — should be left to a licensed electrician. The most dangerous causes of partial power loss involve service-entrance hardware that's directly connected to the utility line and can't be safely de-energized without coordinating with Dominion Energy.

How can I tell if it's a broken neutral?

Three signs strongly suggest a broken neutral: (1) 240V appliances don't run at full power even when their breakers are on; (2) lights on one part of the house flicker erratically when an appliance starts elsewhere; (3) electronic devices start dying or behaving strangely. If any two of these are present, treat it as an emergency.

Will the utility fix this?

If the broken neutral is in the utility's wire (from the pole to your meter), they'll fix it at no cost — but only after you call them or us. The meter itself is the boundary: Dominion Energy owns and maintains everything upstream; you own everything downstream. Most partial outages we see are downstream (panel-side), so we'll fix it ourselves; if we determine it's utility-side, we coordinate with Dominion on your behalf.

Why did my power come back on its own?

Intermittent partial outages — where power comes and goes — are a hallmark of a loose connection that's making contact intermittently. Heat, vibration, or a slight movement of the panel can re-make the connection temporarily, then break it again. This is dangerous because every make/break event is an arc, and arcs are how electrical fires start. Even if power is currently back, schedule a diagnostic visit.