Outlets, switches and GFCIs in a 1950s or '60s house
The quick take
Worn outlets, GFCIs that won't reset, and old switches and dimmers can be swapped in the boxes already in the wall. Warm plates, a burning smell, aluminum wiring, a breaker that keeps tripping, and anything that needs new wire go to an electrician.
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About 62% of Monterey Park's homes were built before 1970, according to the Census Bureau's 2020-2024 American Community Survey (homes by year built). The wiring behind the cover plates in those houses may be original, or it may have been changed a few times since. This guide sorts what you can see and test from the outside, what a straight swap in the same box fixes, and what goes to an electrician.
What you notice, and what it usually means
| What you notice | Likely cause | Usual fix |
|---|---|---|
| Plugs slip out or feel loose | Worn contacts inside the outlet | Replace the outlet in the same box |
| Several outlets dead, no breaker tripped | A GFCI on the same circuit has tripped | Find it and press reset; replace it if it won't reset |
| Cover plate warm, or a burning-plastic smell | A loose or failing connection | Stop using it and send us a photo; damage past the outlet goes to an electrician |
| LED bulbs flicker or buzz on a dimmer | An older dimmer not rated for LEDs | An LED-rated dimmer |
| Switch feels loose or gritty | A worn switch | A new switch, dimmer or smart switch |
| Three-slot outlet, but a tester reads open ground | An outlet updated on a circuit with no ground wire | A labeled GFCI, or an electrician to add a ground |
| Breaker trips again right after reset | A short or overload on the circuit | Leave it off and call an electrician |
Testing a GFCI the way the CPSC describes it
The U.S. Consumer Product Safety Commission's GFCI fact sheet (PDF) says to test every GFCI after it's installed, at least once a month, and after a power outage. Its method needs nothing but a lamp:
- Plug a lamp into the GFCI and switch it on.
- Press TEST. The lamp should go out. If it stays on, the fact sheet says the GFCI isn't working or wasn't installed correctly, and to contact a qualified electrician.
- Press RESET. If the lamp doesn't come back on, replace the GFCI.
One GFCI can protect the ordinary outlets wired after it on the same circuit. Those outlets have no buttons of their own. Many GFCIs come with stickers for marking them, like the "GFCI protected outlet" label above. When a bathroom outlet and a hallway outlet both go dead at once, a tripped GFCI somewhere else on the line is the first thing to look for.
Aluminum wiring from 1965 to the mid-1970s
About 7,400 Monterey Park homes were built between 1960 and 1979 (same Census table), and part of that span overlaps a known wiring issue. The CPSC's Publication 516 on aluminum wiring (PDF) puts the window this way: "Homes built before 1965 are unlikely to have aluminum branch circuit wiring. Electrical cables installed between 1965 and the mid 1970s in new homes, in additions, and as part of rewired/new circuits may contain aluminum wiring."
The same publication explains how to look. Where cable is exposed, in a garage or attic, the jacket is printed or embossed with "Al" or "Aluminum" every few feet; a flashlight held at a low angle helps. A jacket that also says "CU-clad" or "copper-clad" is a different product that the publication's repair advice doesn't cover.
The CPSC's recommended fixes are a full replacement with copper or specific connection repairs, done by a qualified electrician. If we open a box for a swap and find aluminum conductors, we stop there and tell you what we saw so an electrician can take it from there.
Kitchens, baths, garages and laundry sinks
The CPSC's home electrical safety checklist (PDF) recommends GFCIs "in kitchens, bathrooms, and other areas where the risk of electric shock is higher," and suggests having them where the National Electrical Code calls for them, naming garages, unfinished basements and spots near laundry tubs or wet bar sinks. If those rooms in your house still have ordinary outlets, a GFCI is a same-box swap where the wiring is already there, and one GFCI can cover the outlets after it on the circuit.
Switches, dimmers and smart controls
A switch that feels mushy, crackles or only works when pressed a certain way is worn out. Swapping in a new toggle is the simple version; a dimmer or smart switch can go in the same box when the box has room and the wires the product calls for. Read the smart switch's box for its wiring requirements before buying, since requirements vary by model. LED bulbs on an older dimmer are the usual cause of flicker, and an LED-rated dimmer fixes it. The vanity lights guide covers dimmers at the bathroom mirror, and the bathroom fan guide covers timer switches for exhaust fans.
What a swap covers, and what goes to an electrician
- A same-box swap: worn outlets, GFCIs that won't reset, switches, dimmers, smart switches, USB and tamper-resistant outlets, and new cover plates.
- Electrician work: new outlets or switches where there's no box, moved outlets, new circuits, panel work, aluminum wiring, a breaker that keeps tripping, and adding a ground.
When something in the second group turns up, we'll say what we found so you can hand it straight to an electrician. For a fan on the same circuit, see the ceiling fan guide, and for the job itself see outlets, switches and GFCIs.
Our outlets, switches, and GFCIs page lists what’s included, plus which photos make the quote easy. For the background on these houses, read Monterey Park homes and their common repairs.
Hand this one to us
Call or text (626) 684-3505 (Mon–Sat, 8:30 AM–7 PM). Send a photo and your ZIP code, and we’ll quote it before we pick a day.
Call or text (626) 684-3505