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Saturday, October 2nd, 2021 9:14 PM

doorbell camera burning out doorbell transformers

Since I can't reach the technical support, I am posting here.  I have been trying to install my Simplisafe doorbell camera.  It has taken a while because our house did not have a pre-existing doorbell, so it was a bigger project than the plug/play instructions. I needed to install a transformer and run a low voltage wire.  I now have several holes in the wall and 3 burned out transformers for my effort.

All of these transformers were 16V units.  The first ran the doorbell through part of the setup, but then stopped suddenly.  The second burned out immediately.  The first 2 transformers were rated at 16V 10vA, so I upgraded to a 16V 30vA unit based on an online recommendation, which is what you use when technical support doesn't answer.  
I had been testing the voltage after installation, but this last time I tested the installation stepwise.  I installed the transformer and tested it with no load...good output.  I attached the low voltage wires and tested the base unit (no camera)...good output again and this demonstrated there was no short in the line from transformer to base.  I attached the camera and it lit up green for a few seconds and then stopped.  The transformer was dead coincident with attaching the Simplisafe  doorbell camera.  Simplisafe owes me for 3 transformers (~$60) and for the worthless doorbell camera.  Anyone else have this problem?

725 Messages

3 years ago

My house is almost 40 years old and has an old 16V 10vA transformer. When I first installed the video doorbell pro I noticed a humming from the chime box and sometimes the wi-fi connection would flake out. I lived with this for quite a while until I requested their chime connector and installed it and I have had zero issues since.

I do have a question - what does this sentence mean?

I attached the low voltage wires and tested the base unit (no camera)...good output again and this demonstrated there was no short in the line from transformer to base.


Are you attaching the low voltage wiring from the doorbell transformer to the SimpliSafe base?! Or are you referring to a different kind of base? Also did you install a chime box as well, or just a transformer and wiring? (I don't know if this matters, I'm just curious.)

FYI, this isn't a SimpliSafe specific problem. You will find a TON of hits for this same issue with Ring Doorbell Cameras with a variety of root causes given as well. At this point you may have 3 dead transformers and a dead camera as well.

Good luck with this. I'm super curious to hear what the root cause is.

@Johnny M,

Can you provide clarity on the specs needed to power the doorbell pro? Is the 30a part overkill but otherwise safe? Or is it possibly causing an issue?

1 Message

1 year ago

I had a very similar experience. I am convinced that the first three transformers burned up due to a short across the wires; The wire casing got scratched off during installation which caused the short.  Amazingly, the third transformer worked long enough to power up the doorbell for a a few minutes before burning up.

For the fourth transformer I performed multiple checks:

  • resistance across the 120v side (unpowered) - good
  • resistance across the 24v side (unpowered) - good
  • resistance at the doorbell mount (unpowered, wire check) - good
  • output at the doorbell mount (powered) 26.2v

I switched off the power, installed the doorbell, and turned the power back on - nothing.

Re-checked the transformer output:

  • output at the doorbell mount (powered) 2.3v
  • resistance at the doorbell mount (unpowered) N/A - infinite.

I took the doorbell off and tried running it using the micro-USB port on the back but had no luck there.

Best guess is that the doorbell burned up during my third attempt, and the fried doorbell burned up the fourth transformer. 

Community Admin

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5.7K Messages

@Damon ​ I don't have electrical experts on my team, so unfortunately I'm not able to help as much here. But do you already have the Chime Connector, as Worthing mentioned above? It helps with supplying the correct voltage to the Video Doorbell. Our Support team can send you one for free.

As for the Video Doorbell being unresponsive - it could just be that the internal battery is drained from the multiple attempts at setup. When it's plugged into the circuit, and assuming everything else is set up correctly, it should recharge on its own and eventually come back to life.

4 Messages

10 months ago

So have you resolved it? Have had mine a couple years and this is the second time I am going through burning up transformers. Last time, the replaced the doorbell unit and was good for a long ti.e. back at it now

Community Admin

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3.3K Messages

@srosewhitmore​ Does your doorbell setup have a mechanical chime box? That is a requirement for the Video Doorbell, because using it without a mechanical chime can burn out the transformer. 

If you do have a mechanical chime, I would then recommend getting a Chime Connector from our Support team. The Chime Connector works to supply the proper voltage to your Video Doorbell, as if it gets the wrong voltage it could damage the transformer as well.

4 Messages

So after a couple years, I also need to buy and install a chime?

Community Admin

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3.3K Messages

@srosewhitmore​ If you do not have a mechanical chime box, then that is needed for the Video Doorbell's setup to ensure there is no damage to your transformer or the device. But if you have a mechanical chime box and you need a Chime Connector, our Support team can send one to you free of charge. 

5 Messages

1 month ago

I have also had this same issue. Been running a Simplisafe Video doorbell connected to a Defiant Transformer for several years. The transformer and doorbell were installed at the same time. Suddenly the transformer died about a week ago. bought a replacement, and it died. However I was skeptical that was defective since it looked like a returned item. So today bought a 3rd transformer. I connected the transformer it to the power supply, the load screws were reading perfect output, 8v, 16v or 24v. All of which are accepted by the Simplisafe doorbell. I connected the low voltage wires, still solid steady voltage readings. I connect the doorbell, the ring lit up for a second, then nothing. I went back in the basement and the transformer is no longer providing any output voltage on the load screws. The doorbell caused it to burn out, and probably burned out the 2nd one too. These are standard, off the shelf transformers that work for decades otherwise. Why is this suddenly a problem? When I connect the doorbell to a USB cords, functions just fine.

Community Admin

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3.3K Messages

@sbrof​ Do you have a mechanical chime box as part of your setup? A mechanical chime is part of the Video Doorbell's requirements, as it acts as a "current limiter." Without a mechanical chime, the Video Doorbell or the transformer could get damaged/burnt out due to a lack of overall resistance in the circuit. 

5 Messages

I don't because 2 years ago that wasn't part of the system requirements. Do you sell chimes or will any mechanical (wired) chime work.

Community Admin

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3.3K Messages

@sbrof​ We do not sell our own chimes, but any mechanical chime will work.

5 Messages

@emily_s​ Does simpliesafe provide a wiring diagram to use for their video doorbell when connected to a mechanical chime? I purchased a mechanical chime with 16VAC-10VA transformer but nothing happens when the doorbell is connected. There is voltage on the transformer and at the doorbell the backplate's screws are steady but the doorbell does nothing now.

Community Admin

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3.3K Messages

@sbrof​ Does your Video Doorbell show any lights, or is it completely unresponsive? 

If its completely unresponsive, I would first check to make sure the Video Doorbell's mounting bracket isn't screwed on too tight, causing it to bend. The gold pins on the back of the Video Doorbell need to have contact with the mounting bracket in order to get power, so if the bracket is bending that could be the cause. I would try slightly loosening the screws and then put the Video Doorbell back on its mounting bracket for 10 minutes to allow it to charge back up.

If, after 10 minutes, the Video Doorbell is still unresponsive, it could be that it's not getting enough power. We offer a Chime Connector to help supply the proper voltage to the device, which our Support team can send to you free of charge. 

1K Messages

1 month ago

Yep I have went through 2 of them in the past few years

5 Messages

@lance843​ This is anything but simple. Why can't they design a doorbell that can connect straight to a standard transformer.

1.2K Messages

1 month ago

I don't known the truth of the situations out there, but doorbells and chime connectors always seemed dangerous for fire. Old ones and new ones. Not nitpicking.

Sticking buttons, the ringer pins getting stuck. Seems like your chime connector is being overloaded somehow or undersized.

Some transformers going poof and/or getting hot, in the attic, possibly underneath the insulation.🤔

Not like we check old doorbell ringer pins or ever check the springs. I have checked with adding these doorbells. No chime connector in mine. Not needed.

Back in around 2020 Ring recalled some, a screw issue or something.

Loose wires, melted insulation on wiring, causes potential sparks and potential fire.

Best checked out thoroughly.

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