Known as the Door Operator Guru, Roy Bardowell is one of the most respected and knowledgeable men in the garage door and operator industry.  His special passion for residential garage door, commercial door and gate operators leaves an impression on everyone he meets.  Roy's training sessions at IDA Expos are always the one of the most widely attended sessions. He has been recognized by IDEA with the "Commitment to Excellence Award" and is an IDEA Certified Door Dealer Consultant.  Roy is a member of the tech service team at Micanan Systems. He was Operations Manager at Guardian until 2012.  We hope that you find Roy's articles informative and entertaining.  Feel free to leave your comments for Roy.


An Engineering Marvel

by Roy Bardowell, CDDC

A garage door is truly a scientific marvel. The science, physics and dynamics of the garage door system is mostly mis-understood. To get a good bead on what’s going on with a garage door you have to study a system from A to Z.

Manufacturers have the edge on understanding most of the dynamics because they have been deeply involved in the study, design, and evaluation of the products for decades. Most residential garage doors sold are 7 feet high and come in various widths. Common widths are 8, 9, 14, and 16 feet, but lesser known is garage door manufacturers can make a door in almost any custom width if needed. Consult the factory for lead time and extra charges. The first two widths would be considered as a 1-car garage door whereas the last one would be considered a double car garage door.

Other double-car garage doors may be 12 or 18-feet wide. Sometimes a builder goofs and builds a door frame only 12-feet wide, which would then require you to install an undesired 12-foot door which would be tight squeeze for two cars. Even if you could park 2 cars under a 12 or 14-foot-wide door, the users would generate hundreds of dings in their car sides every year. A 12-foot wide door is for those with only one car or 2 motor bikes.

The vertical and the horizontal tracks are produced in 3 profiles, being 2 or 3-inch, which every door technician is aware of or 1-inch found only in trailers with rear end overhead doors.

Track kits come in 2 segments; one being the vertical track which is to guide the door down into the opening and seal off the opening from outside elements. The horizontal track must be strong enough to hold the full weight of the door when it is open. The horizontal track typically has the curve in it that projects the door up and back. The curve is known as the track radius and can be ordered in 10, 12, 15, and specially ordered up to 32-inch radius. The most common radius is 12”. To calculate head room clearance, you can take the vertical frame height and add the two numbers together. Let’s say the frame height is 84” and the ceiling to floor headroom is only 96”. An 84” high door plus a 12” radius = 96”, which would give you just enough space for the door and torsion spring assembly. If we take the 84” opening and add 15” for a 15” radius the two added = 99”, which will place the door too high. The bigger the radius the higher off the floor your door will be when fully opened. Working this in reverse I could say the floor to ceiling is 96”. This means if I want to install an 84” high door and use a 10 or 12” radius track it will fit. (84”+10” = 94”/ 84”+12”=96”) I have 2 choices on radius that will place an opened door just under the ceiling.

Since Hurricane Andrew hit in Florida, there has been much emphasis put on making garage doors stronger, so not to bow and able to withstand the extreme positive and negative pressures placed on the garage doors from high wind loads. After Hurricane Andrew the garage door became a focal point for the origin of many destroyed homes. It was discovered that when the garage door failed, the wind came into the garage and pushed the roof up and away. Once the roof was gone the wind pushed down interior walls. Without the interior wall, the wind could push over exterior walls from the inside. A positive pressure will push a garage door into the garage. A negative pressure will pull a door out into the driveway so the doors that meet wind load standards must be the best built in the world.

In areas of extreme winds, the vertical track shall be made with a heavier gauge and have stronger jamb brackets so not to be deformed and hold the door in place. The door panels will also be made with better reinforcement, which must be sturdy enough so not to bow inward or outward. The most common residential track kits are designed to guide a 1.75”-thick-door which is an industry standard. When door sections are made in uncommon thicknesses, the track provider must be informed so you get the jamb brackets secured with the correct offset. I prefer bolted jamb brackets because you can loosen the bolts and adjust the vertical track in order to move the door closer or further from the jambs. From a manufacturers point of view spot welding may be the least costly, but it is messy and permanent meaning you cannot make any adjustments afterwards. If you want to remove a spot weld you have to drill it out using a 1/4” or 5/16” drill bit and then hammer a chisel between the 2 pieces of steel. The jamb bracket or other will then pop away, but there will be sharp burrs, so carry a grinder to smooth out the sharp burrs.

Roy Bardowell, CDDC, is a member of the tech support team at Micanan Systems. He served as Operations Manager at Guardian Access & Door Hardware until 2012. He has been in the door and operator industry since 1973 and is known as one of the industry’s most experienced operator technicians and trainers. Roy received the IDEA Commitment to Excellence award in 2008 and IDA’s Jerry R. Reynolds Volunteer Service Award in 2017. Contact him at

  1. Bob's picture
    Oct 24, 2017

    I have a Clicker KLIK2U.... Does it work with a Guardian? If so what is the id code for Guardian

  1. Brian's picture
    Oct 26, 2017

    A Clicker is not Universal.  It will not  work with a Guardian garage door opener.  Google "Guaridan GDOR2B" for sources that will sell a compaible remote.  If more help is needed please call 1-424-272-6998.

  1. Anonymous's picture
    Nov 15, 2017

    No I don't believe Clicker included the Guardian frequency in their product.

  1. Elmore Haney's picture
    Nov 08, 2017

    We have a 2011 Ford Escape with an Interior System for operation of Exterior Gates, Garage Door and House Security Lights. I am unable to Program the Guardian 630SL with the vehicle equipped system which worked with the other Garage Door Opener our home had. Is there a reason I am unable to set up this Opener purchased from your company using the "Guardian Remote Clicker" the only answer to this inconvenience ?

  1. Brian's picture
    Nov 16, 2017


    There are two systems auto manufactures supply with their cars, HomeLink, made by Gentex and Car2U made by Leer Corp.  Guardian operators are compatible with HomeLink, but not Car2U.  Please check your car's owner's manual to see what system is used in your vehicle.  There should also be a phone number in the manual to call for help in programming either of the two systems.


  1. Scott Caryer's picture
    Nov 11, 2017

    I have two guardian remote controls that do NOT open our Guardian garage door opener. I have replaced the batteries in both units, and they still do not work. However, the external wall mounted wireless garage door opener works, as well as the embedded garage door openers in our Honda cars. So what is not working are the two guardian remotes. Please provide some direction to troublehoot and solve this issue.

    Thanks in advance...Scott

  1. Brian's picture
    Nov 16, 2017

    Hi Scott,

    Have the remote controls always worked with the garage door opener or is the issue something recent?  The fact that the HomeLink system in your car is working indicates that the radio receiver in the opener is working.  What are the model numbers of your opener and remote controls?  To talk directly to a tech who can help to troubleshoot, call 1-424-272-6998.

  1. Alayne's picture
    Nov 30, 2017

    Is there a way to put the lights on the opener in "motion" mode, rather than just coming on by pushing the light button or opening the garage door?

  1. Brian's picture
    Dec 04, 2017

    Dear Alayne,

    Some gargae door openers have a special control console that can provide this function.  Your Guardian opener is not adaptable to this console,  A less expensive alternative would be to replace the light switch in your carage with a passive infrared motion sensor wall switch.  This switch will recognize a presence in the room/garage and turn on/off lights accordingly.  A garage door opener system works with a set timer, so lights can remain on even after the person has left the garage.  The switch could be purchaed at any hardware of store or home center.


  1. Brian Cuyno's picture
    Jan 13, 2018


    I recently received a new unit (628) from Diego, who works at your Los Angeles office. It is now installed but I continue to have problems.

    When trying to program the up and down limits I continue to have issues, I will try to program the up limit and it will stop, which will require me to continue the process until the door is up. Then when I try to program the down sequence the door will start to go down then beep once, then stop. I go through the sequence again and the programing sequencing process does not go through smoothly. I keep pressing the limit twice for the down option, I will work for a second then it won't.

    Right now my wife and I are having to manually open and close the door.


  1. Brian's picture
    Jan 15, 2018


    Pages 16-18 in the 628 owner's manual will provide a step by step process, if more help is needed, please contact our tech service help line (424-272-6998) and a tech will walk you through the limit setting process.  


  1. Steve's picture
    Jan 30, 2018

    I recently posted complaining about the motor. I found a number for Guardian technical services online and as a last effort I called them. Technical services was great and helped me fix the problem fairly easily with directions over the phone. I’m impressed with corporate but still disappointed in the local installer as since the day they installed the opener they come across as more interested in generating charges than doing what’s right for the customer.

    Thanks to Technical Services!

  1. Shirley Rankin's picture
    Feb 05, 2018

    I'm in New Zealand. If I can't source this for my Guardian 21230DL, I'll have to discard an entire garage door opener which works perfectly well just because it can't receive the signal from the remote.

    I looked for an internet sale on your website but couldn't find it.

    Considering that it will cost $800 to replace the whole door opener unnecessarily, I would really appreciate your help.


  1. Brian's picture
    Feb 11, 2018

    Guardian products can be found in New Zealand at Windsor Doors

    Windsor Doors Auckland

    347 Great South Rd.

    Takanini 2112, Auckland

    P: 09 298 8655

    F: 09 298 0626


    Windsor Doors Christchurch

    Doric Way, Waterloo Business Park


    P: 03 343 3276

    F: 03 343 3761


    Windsor Doors Wellington

    (Incorporating Castle Doors Ltd)

    95 Nelson Street,

    Petone, Wellington

    P: 0800 020 785

    F: 04 589 3986

    Windsor Doors Hamilton Unit 8

    170 Maui Street

    Te Rapa, Hamilton

    P: 07 850 6140

    F: 09 298 0626

  1. Marty Marias's picture
    Mar 01, 2018

    Roy, I have six two button remotes, the black rubber inserts fall out and I have to use a small object to activate the opener. Would it be possible to send me five or six replacements. I would happily pay for them.
    Marty Marias
    310 328-6278
    201 Ruth Ave.
    Venice CA 90291

  1. Jamie's picture
    Mar 24, 2018


    My garage door motor is beeping every 15 minutes. Is this due to my remote battery being low or the motor being low? I'm having trouble locating a batter on the actual motor.

  1. Brian's picture
    Mar 25, 2018

    Hi Jamie,

    A good answer can't be provided without more information.  Please call 1-424-272-6998 and a tech will be able to assess the issue and provide a solution. 

  1. smith's picture
    May 01, 2018

    I read the comment on how a clicker is not universal and will not work on guardian garage doors. Specifically could you please suggest one that will work? Your tech phone number is useless! I've left two messages and not received a return call yet and its been three days. No one ever answers either.

  1. Brian's picture
    May 06, 2018

    Any Guardian remote control listed on the remote controls page on this website will work with any Guardian operator.

    If there are issues reaching technical service please feel free to contact a regional office (also listed on the website).

  1. Sherri's picture
    May 13, 2018

    My garage door will not work with the wall panel unit. The remote control units work and the keypad outside works. Any suggestions?

  1. Brian's picture
    May 14, 2018

    Hi Sherri,

    Is the LED back light on the panel glowing?  Check the wiring first.  The plug on the end of the wire leading from the control banel should be securely plugged into the "wall box" recepticle on the motor head.  Check for any wire shorts due to staples holding the wire to the wall.  Check the wire terminal connections on the back of the panel.. If more help is needed please call 1-424-272-6998.

  1. Robert Johnson's picture
    Jun 29, 2018

    The drive belt on my 3/4 HP Guardian executive series 600SL has broken. How do I get it fixed? I called your 800-989-8769 phone number and the phone company said the number is disconnected so no one answered

  1. Brian's picture
    Jul 04, 2018


    Please call Guardian Tech Service at 424-272-6998 for help.  

  1. Jada's picture
    Aug 12, 2018

    Lost power and opened the garage manually, power came back on the door opened almost completely and stopped. Beeping 20 times checked no lights on. Metered the wires for power, 21.08 tried aligning can't get any LEDs on?

  1. Brian's picture
    Aug 13, 2018

    Dear Jada,

    20 beeps signified a photo-eye misalignment or faliure.  Please call Guardian Tech Service at 1-424-272-6998 to resolve.  Thanks

Leave a comment

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.