We work on a lot of Nutone intercom systems here in Los Angeles. Especially in older homes in the San Fernando Valley, Pasadena, Glendale, and all across the city, still these units are installed. Some of them have been running since the 70s and 80s. People call us when things go wrong and stop working. The problems we see are the same, such as bad connections of wiring, worn-out speakers, and dead capacitors. If you have a Nutone intercom at home and something isn’t right, this guide will help you figure out what’s going on before you pick up the phone.
Why Nutone Intercoms Stop Working
The Nutone intercom systems are too old. That’s really the main reason they stop working. The internal parts, capacitors, speaker cones and FM tuner modules were not made to last for 30 to 40 years. The heat here in Los Angeles wears out all the more quickly than expected. The low-voltage wiring connecting all the stations also corrodes over the passage of time, especially at the screw terminals. One bad connection point can mess up the whole system. The first thing to figure out is where the problem is before you start.
Common Problems and What to Do
Unit is completely dead
Immediately check your breaker box first. Nutone master stations are hardwired, and they sometimes share a circuit with a nearby outlet or light. If the breaker is fine, open up the master station and look for a small glass fuse close to the power transformer. That fuse blows sometimes, and it’s easy to repair or change. If the fuse is in good condition, there is no issue with the breaker, then the issue must be inside the transformer unit.
Issues With Audio
The most common issue in the Nutone intercom is its sound getting scratchy, buzzy and muffled. It is because the speaker cone wears out and starts to distort. Sometimes it happens due to a small capacitor on the circuit board. Find out the issue and resolve it, if necessary, then change the dried capacitor, and the speaker cone and your Nutone will start working again. You can resolve both problems with ease, without spending anything substantial.
Only one side can hear
If you listen from the other room but they can’t, then check the talk button first. These buttons get stiff and sticky with time. Press it continuously; if it’s moving properly, then you just need to clean it with a dry cloth. If the button seems in better condition, then the fault must be in the room station. so examine all the wiring terminals of the room station. If you see any loose or corroded wires, rewire them properly. If you don’t do it yourself, then take the services of FDS Security Cameras Los Angeles.
Constant humming or static noise
A hum that doesn’t go away usually means a grounding issue or a failing power supply. Static that cuts in and out is almost always a loose wire at one of the room stations. These systems run in a chain, so one bad connection point adds noise to every station in the house. Contact a professional team in Los Angeles, they will turn off the system, check all the room station terminals, tighten anything loose, and look for wires that look pinched or worn through the insulation.
Built-in FM radio stopped working
A lot of old Nutone intercom systems came with a built-in FM radio. Sometimes the radio is dead but the intercom still works properly, which means the FM tuner module inside the master station has stopped working. And it is almost impossible to find the FM tuner module unit, so plugging a small external FM tuner into the auxiliary input.hoply it will start working again.
Door station not working
Front-door intercom stations take a beating from sun, heat, and weather, especially here in Los Angeles where the sun does real damage to outdoor hardware. The wiring terminals get rusty faster than indoor units, and the call buttons stop working. Spray the contacts with an electronic contact cleaner and let it dry before putting it back together. That fixes it more often than you’d think. If the station gets worse, then order online the door station for older Nutone systems.
Should You Repair It or Replace It?
If you are using an old Nutone system of the late 80s or early 90s and some of the components stop working then there is no choice but a complete replacement. On other hand the modern wireless intercom systems are much easier to install and come with different features. If one component of it stops working or is broken, the other parts still work, so proper repairing it makes more sense. The low-voltage wiring of the Nutone intercom system in your walls is still usable, and a repair will keep it in use for years. We fix these systems regularly for homeowners all over Los Angeles.
Useful Installation Tips
Make sure to follow the installation tips while setting or rewiring your Nutone System in Los Angeles
Take photos: Nutone systems wire up differently depending on the model, some use a star layout, some daisy-chain. Before you disconnect all the wire make sure to take some images of, tape the cables to understand, how to to reinstall the cables and where to connect. Because mixed-up wires on a multi-station run are a real pain to sort out after the fact.
Use 4-conductor 22-gauge wire: The thinner wires decrease the voltage in long cables, it affects the audio results, so make sure to keep the cable running 70 to 90 feet in huge houses.
Intercom and electric wire: do not run the electric high voltage cables near the intercom cables. Running them in parallel causes a hum, which is not an easy job to eliminate.
Tighten every terminal: Tight all the loose wire at a terminal before closing. Make sure all the wires are in the perfect place. This takes an extra minute but it prevents you from so many issues.
Examine the room stations: Power the system on and actually talk through each station before screwing on the wallplates. Fixing a bad connection is quick when the station is still hanging loose. It’s not quick when it’s already mounted flush in the wall.
Seal the outdoor door station after mounting: Use the silicone around the edge of any exterior station. Here in Los Angeles the sun and occasional rain work together to get moisture behind the unit. Once water gets into the terminals, the station usually doesn’t last much longer.
Final Words:
The Nutone intercom is an old system still in use in Los Angeles, but it is now becoming rusty and experiencing several issues, such as units going dead, audio problems where sometimes only one side hears static noise, and overall reduced functionality because the door station stops working. To eliminate all the problems, contact FDS Security Cameras in Los Angeles and make your home safer and feel stress-free.