4.9/5 — 1,926+ Five-Star Reviews
Electrical Troubleshooting & Repair
Bay Area's #1 Choice
Systematic diagnostic testing to isolate intermittent circuit failures, grounding issues, or voltage fluctuations. We prioritize root-cause identification over surface-level fixes.
- 25+ Years
- Licensed & Insured
- 24/7 Emergency
- No hidden costs
- Same-day service
- Fully licensed and insured
- 6000+ completed jobs
4.9/5 Rating
1,926+ Reviews
Licensed & Insured
CA Licensed
Same-Day Service
24/7 Emergency
25+ Years
Bay Area Experts
6,000+
Jobs Completed
Simple Process
How It Works
Call Us 24/7
Reach us anytime at
(408)539-6936.
Same-Day Dispatch
A licensed technician arrives at your home, often same day.
Diagnose & Fix
Upfront pricing before work begins. No hidden fees, ever.
100% Satisfaction
We stand behind every job with our satisfaction guarantee.
Professional Electrical Troubleshooting & Repair Services
Our expert technicians provide comprehensive electrical troubleshooting and repair solutions tailored to your home’s safety, reliability, and power performance. With 25+ years of experience serving the Bay Area, we deliver precise diagnostics and dependable electrical repairs you can trust.
Whether you need a routine electrical inspection, outlet or switch repair, circuit breaker troubleshooting, wiring fault correction, or emergency electrical repair service, United HVAC has you covered. We use advanced testing equipment and follow strict industry safety standards to ensure every electrical issue is diagnosed accurately and repaired correctly the first time.
All work comes with our satisfaction guarantee and warranty coverage. We believe in transparent pricing and honest recommendations — you’ll always know the cost before we start any electrical troubleshooting or repair work.
100% Satisfaction Guarantee
If you're not completely satisfied with our work, we'll come back and make it right — free of charge. That's our promise to every customer.
Signs You Need Electrical Troubleshooting & Repair
- Sparking wires or lights that flicker constantly
- Breakers that keep tripping for no obvious reason
- Burning plastic smells or ozone odors near outlets
- Voltage drops when the AC or fridge kicks on
- Brittle, cracking, or crumbling wire insulation
- Dead outlets or switches that stopped working
Why Choose United HVAC
- 25 years of experience
- Same-day service
- 1+ year warranty
- 6000+ completed jobs
- 0% interest financing and discounts
- Fully licensed and insured
- Well reviewed and highly trusted
- No hidden costs
- We work 365 days a year
Got Questions?
Frequently Asked Questions
If a breaker trips as soon as it’s flipped back on, it indicates a "hard short" or a catastrophic failure in the circuit. This happens when a hot wire makes direct contact with a neutral or ground wire. Do not attempt to force the breaker to stay on, as this can lead to a fire; the circuit must be isolated and the short located before power is restored.
A single dead outlet is often caused by a loose wire connection or a tripped GFCI outlet located "upstream." Because outlets are often wired in a series, one tripped safety device can cut power to several downstream sockets. We test the continuity of the circuit to find the break and secure any loose terminal screws.
Flickering across multiple fixtures usually points to a loose neutral wire in your main electrical panel or at the utility service entrance. This is a serious issue that can cause voltage fluctuations, damaging sensitive electronics and smart appliances. If the flickering is localized to one room, it likely indicates a failing light switch or a loose wire nut in a junction box.
Discoloration (brown or black scorch marks), buzzing sounds, or a "fishy" or burning plastic smell are critical warning signs. If an outlet feels warm to the touch or if plugs fall out easily because the internal contacts are loose, the outlet is failing and can cause electrical arcing. You should stop using the outlet immediately until it is replaced.
This is known as a voltage drop. It happens when high-draw motors (like an AC compressor or refrigerator) pull a large amount of current on startup, overwhelming an undersized circuit or a weak main breaker. While common in older homes, persistent dimming can shorten the lifespan of your appliances and may require a dedicated circuit for the heavy equipment.
No. A quiet hum is normal for some transformers, but a loud buzzing or clicking sound from the panel usually indicates a circuit breaker that is failing to trip or a loose connection at the bus bar. This creates heat and arcing, which can melt the panel's internal components and lead to a total system failure.
If a GFCI (the outlet with the "Test" and "Reset" buttons) won't stay depressed, it is either detecting an active ground fault (moisture or a wiring fault) or the internal sensing mechanism has failed. In 2026, many homeowners find that older GFCI units reach the end of their life after 10 years and must be replaced to maintain code-compliant protection.
This typically indicates a "dropped leg" of your 240V service. Your home receives two 120V lines from the utility; if one fuse blows at the street or a connection fails at your weather head, half of your 120V circuits and all your 240V appliances (AC, dryer, stove) will stop working. We coordinate with the utility company to determine if the break is on their side or yours.
Frequent disconnections can be caused by electrical "noise" or interference from poor grounding. If the switch isn't receiving a clean, stable voltage due to a loose neutral wire, the sensitive digital components will reboot or lose connectivity. We verify the wiring integrity at the switch box to ensure your smart home infrastructure remains stable.
Yes. Any sign of burning, active sparking, or a hot electrical panel is a critical emergency. We provide 24/7 response to perform thermal imaging and diagnostic testing, isolating hazardous circuits and performing immediate repairs to prevent an electrical fire and keep your home safe.
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Explore Our Other Services
Heating & Air Conditioning
10 services available
Plumbing Services
9 services available
Drain & Sewer
4 services available
Water Line / Repiping
4 services available
Water Heating & Filtration
4 services available
Electrical Services
6 services available
Posted on Google Omied LeleTrustindex verifies that the original source of the review is Google. Pasha (technician) was very helpful. We had a clogged drain and were unable to clear it ourselves. He arrived and fixed the drain and was very clean and polite. Left everything as it was before he arrived. Highly recommend.Posted on Google Liang KatherineTrustindex verifies that the original source of the review is Google. Fantastic service! We really enjoyed working with United plumbingPosted on Google Natalia ShreveTrustindex verifies that the original source of the review is Google. Pasha was very professional he gave us a couple of options and finished the plumbing job very quicklyPosted on Google Just JaniceTrustindex verifies that the original source of the review is Google. As a busy homeowner I truly appreciate their ability to work around my schedule and needs. My garbage disposal recently died, and Neo was professional and offered my different options. He had the parts I needed and was able to complete the job quickly and cleanly.Posted on Google Chaozhong LianTrustindex verifies that the original source of the review is Google. I wholeheartedly recommend United HVAC, Plumbing & Electrical. I recently hired them to replace the original 1961 HVAC ductwork in my house, and they did a wonderful, extremely professional job. I am beyond satisfied with the results. You don't just have to take my word for it--I actually took pictures of their completed work, uploaded them to Google Gemini, and asked the AI to evaluate the installation. Even the AI praised their work, calling it a "top-tier, textbook installation"! (See the screenshots below). During the bidding process, I compared United with another company. United's quote was slightly higher, but choosing them was absolutely the best decision. Their program manager, Tim, was incredibly easy to work with. He quickly identified asbestos tape on my 1961 ducts and insisted we use a C-22 licensed abatement company to remove it safely and provide all the legal documentation for future reference. The other company offered a cheaper route by doing the removal themselves, but for something as dangerous as asbestos, doing it by the book is well worth the minor price difference. I also want to give a massive shoutout to Bair (Bayar) for his exceptional craftsmanship. He is easy-going, friendly, and really listened to all of my concerns. He provided great recommendations on how the new ductwork should be organized, and actually used a machine to fine-tune and balance the air pressure throughout the house. To top it all off, he even carefully reorganized the insulation in my attic after the work was done! It's this kind of attention to detail that makes them stand out. The pictures speak for themselves. If you want true professionals who care about safety, honesty, and quality craftsmanship, go with United HVAC.Posted on Google Chaozhong LianTrustindex verifies that the original source of the review is Google. I highly recommend United HVAC, Plumbing & Electrical! From start to finish, the entire process was incredibly smooth. They handled all the permits and inspections throughout the project, which gave us complete peace of mind. Every single technician we interacted with was friendly, approachable, and truly easy to work with. I specifically want to give a massive shoutout to Max (Aiusha) and Rinat for their wonderful work. Max is super professional and highly skilled. He installed my water heater and water softener with absolute "military precision." I'm the kind of guy who has a lot of weird, specific ideas about how pipes should be routed and extra gadgets I want installed to monitor the system, and Max handled all my requests with total ease. I am also super paranoid about plumbers plowing through studs or structural beams in my 1961 house, but Max was extremely careful and treated my home's structure with the utmost respect. Rinat is also a fantastic plumber. He installed a PRV, a Moen Flo auto-shutoff valve, an RO system, and even replaced some of the old sewage pipes in my house. He really listened to all of my requests and finished the job quickly and professionally. I highly recommend him! Because of their wonderful service, I’ve officially signed up for their company's membership. I am currently working with them to redo my HVAC ductwork, and I will definitely leave another review for that project once it's done. I'm sure they will do a wonderful job there, too!Posted on Google Ritesh BediaTrustindex verifies that the original source of the review is Google. Great service. Loved the professionalism and the way fixed my plumbing problem. I would call them again.Posted on Google Ginger PerngTrustindex verifies that the original source of the review is Google. We had to replace the wax ring on our toilet. Scheduling was easy; pricing was fair (much cheaper than the other quote we got!) Our technician, Melvin, was polite and expedient. This is our second time using United and highly recommend for gas and plumbing services.Posted on Google Joseph MartinTrustindex verifies that the original source of the review is Google. Melvin was great. Fast and efficient.
Serving the Bay Area
Electrical Troubleshooting & Repair Available In
We proudly serve homeowners across the entire Bay Area
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