How to Troubleshoot Guardian Garage Door Opener 21230L

Is your Guardian Garage Door Opener 21230L not working? I’m not a technician, but I managed to fix mine. Here’s how I troubleshot and resolved the issues.

My garage door wouldn’t open one day while I was leaving home. I tried the remote, the door opener, the wall switch, and the red switch on the Guardian Garage Door Opener 21230L, troubleshooting directions from the but nothing worked except opening it manually.

Fact – 01:

When I came back and tried again, it worked, and then it worked continuously for 10 days. Then I operated it manually once, which kept working for another couple of weeks. This kept happening for two months, and I got frustrated.

Fact-02:

I called a Professional right away, and they checked everything. They sprayed WD 40 on all the hinges and rollers of the door, checked the door spring, opened Guardian Garage Door Opener 21230L and checked the interior, Motor and other things as per their checklist. They did reset the opening, speed and power.

In the end, they said everything was okay. It seems the opener is too old, and this type of door opener tends to cause problems. If it happens again, they recommended changing the motor, which would cost $750, including the motor and service charge. The service and troubleshooting took a maximum of 20 minutes. They charged me $180 to solve my problem temporarily. Their quick response was impressive, but I still felt some despair.

Questions started flashing in my mind:

I had the idea of the motors, as I dealt with motor pumps, building lift motors, fan motors etc. In fact, I have written an article and recorded a video on how do Lifts or Elevators work in the Building with the help of Lift Technician. I keep learning about technology and engineering because tech is my passion.

If the problem is motor,
  1. Why it was working/Not working situation as explained in Fact-01
  2. Is it a good idea to just change the Motor rather than buy a new Garage Door Opener?
  3. What other option can I try before I decide to spend 750$ just for the Motor?
  4. Did they check all the possibilities to troubleshoot the garage door got stuck problem?

But what Garage door professionals have said did not make sense to me. If the mortar is faulty, then it won’t work at all. It will not behave like it sometimes works and sometimes does not.

My research journey to Fix Guardian Garage Door Opener 21230L:

I watched so many other videos, checked articles and tried the Guardian Garage Door Opener 21230L manual but it was not very helpful.

I am a geotechnical engineer, and I do soil inspections for residential lots for a company based in Perth. Whenever I go for an inspection I look for someone who is doing work on the garage in the new house but they all had no clue until they checked it and I did not want to spend any more just for the garage door opener inspection.

I got frustrated and decided to change the door opener but before I bought it I asked our family friends to check whether they could fix it for me. He asked me about what happened with the old door opener. I explained everything and he suggested checking it first. He stayed near my house and he planned a visit while going home from work.

Guardian garage door opener 21230l troubleshooting:

I did try following primary troubleshooting steps before opening the Guardian garage door opener 21230L.

  1. Disconnected Guardian garage door opener 21230L from the power source. reconnected after a couple of minutes and tried to see if it fixed this problem but it did not.
  2. You can try the wall-mounted switch, remote or button on your opener to see if your wall-mounted switch or remote is not faulty.
  3. Disassemble the garage door from the chain using the Emergency Pull-Cord and try to use the garage door opener and see if it enables the opener to rotate the chain. This will give a basic idea if the motor can rotate the chain or not. If the chain rotates while the door is not connected means the garage door opener is not able to carry the load of the door so adjustment can be done or the door Torsion Spring can be checked. In my case, the opener was not able to rotate the chain. It gives me an indication that the door opener was not working correctly.
  4. The garage door specialist did confirm that the Torsion Spring looked good while they did the service of the door so make sure you get it checked and do not touch that spring if you do not have any experience. This can cost you more if its setting gets tempered.
  5. Apply WD-40 to the hinges and rollers, try opening the door manually to spread WD-40 in the hinges and roller and see if this reduces the struggle of the garage door opener. For the safety of you and your garage door’s safety, we advise this to be done by a specialist.

The outcome from the Electrician on Guardian Garage Door Opener 21230L:

The electrician visited and inspected my Guardian Garage door opener 21230L, he checked everything including the motor and he said everything was fine. He checked the capacitor with his machine and he found it was not working at his full capacity.

He explained what a is capacitor and how it works. The capacitor stores power and gives a boost to rotate and start the motor.

A capacitor is an electronic component that stores and releases electrical energy in a circuit measured in farads (F). It consists of two conductive plates separated by an insulating material (dielectric). Capacitors are commonly used to regulate voltage, filter signals, and store energy temporarily.

Motor Capacitor in Guardian Garage Door Opener 21230L with capacity label
Capacitor’s capacity showing on it.
Capacitor's capacity checked using capacitance meter Peak Atlas ESR70 for Guardian Garage Door Opener 21230L
The capacitor’s Capacity is measured on the device.

As you can see in the above picture the capacitor capacity should be 15uf+/- 5% while in the capacitance meter Peak Atlas ESR70 it was measured at 4.13uf. Which is more than 10uf lower than its capacity. So this capacitor was the reason causing the motor to struggle to get a boost and run with enough power to open the garage door.

The struggle to get the compatible Capacitor for Guardian Garage Door Opener 21230L:

At some point, I felt like our problem was solved as we found that the issue was a weak capacitor but it took two weeks to find the capacitor with compatible specifications in terms of volt, capacity, diameter and length. initially, I was worried about what we have online because of the different companies and design but when we tried it worked like Jem. you can get the capacitor for Guardian Garage Door Opener 21230L from the below link.

Currently, I am working on the video on how to troubleshoot the guardian garage door opener 21230L. Once it is ready I will share it here for you to follow.

Guardian 21230 21230L Garage Door Compatible Remote

If you want to buy a guardian garage door remote, you can check out the link below. Make sure you confirm the compatibility model and order the correct remote.

Guardian 21230 21230L Garage Door Compatible Remote

If you have any issues with the installation procedure or have not been able to resolve the problem, please feel free to reach out to me using the WhatsApp button How may I help you? below or by using the comment box.

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