ADJUSTMENT STEP 2

Adjust the Force

Force adjustment controls are located on the back panel of the motor unit. Force adjustment settings regulate the amount of power required to open and close the door.

If the forces are set too light, door travel may be interrupted by nuisance reversals in the down direction and stops in the up direction. Weather conditions can affect the door movement, so occasional adjustment may be needed.

The maximum force adjustment range is about 3/4 of a complete turn. Do not force controls beyond that point. Turn force adjustment controls with a screwdriver.

NOTE: If anything interferes with the door's upward travel, it will stop. If anything interferes with the door's downward travel (including binding or unbalanced doors), it will reverse.

HOW AND WHEN TO ADJUST THE FORCES

1.Test the DOWN (close) force

Grasp the door bottom when the door is about halfway through DOWN (close) travel. The door should reverse. Reversal halfway through down travel does not guarantee reversal on a one-inch obstruction. See Adjustment Step 3, page 30.

If the door is hard to hold or doesn't reverse,

DECREASE the DOWN (close) force by turning the control counterclockwise. Make smag

adjustments until the door reverses normally. After each adjustment, run the opener through a complete cycle.

If the door reverses during the down (close)

cycle and the opener lights aren'tflashing, iNCREASE DOWN (close) force by turning the control clockwise. Make small adjustments until the door completes a close cycle. After each

adjustment, run the opener through a complete travel cycle. Do not increase the force beyond the minimum amount required to close the door.

2.Test the UP (open) force

Grasp the door bottom when the door is about halfway through UP (open) travel. The door should stop. If the door is hard to hold or doesn't stop, DECREASE UP (open) force by turning the control counterclockwise. Make small adjustments until the door stops easily and opens fully. After each adjustment, run the opener through a complete travel cycle.

If the door doesn'topen at least 5 feet, INCREASE UP (Open) force by turning the controlclockwise. Make small adjustments until door opens completely.Readjust the UP limit if necessary.After each adjustment, runthe opener througha complete travel cycle.

Without a properly installedsafetyreversalsystem, persons(particularly smallchildren) could be SERIOUSLYINJUREDor KILLEDby a closinggarage door.

Too muchforceon garagedoor will interferewith properoperation of safetyreversalsystem.

NEVERincreaseforce beyondminimum amount requiredto closegaragedoor.

NEVERuse forceadjustmentsto compensatefor a bindingor sticking garagedoor.

If one control (forceor travellimits) is adjusted,the othercontrol mayalso needadjustment.

After anyadjustmentsare made,the safetyreversal systemMUSTbetested. Door MUSTreverseon

contactwith one-inch highobject (or 2x4 laid fiat) on floor.

Force Adjustment Control

Back panel

Adjustment Label

29

Page 29
Image 29
Sears 139.53971SRT, 139.53960SRT HOW and When to Adjust the Forces, Test the Down close force, Test the UP open force

139.53960SRT, 139.53968SRT, 139.53971SRT specifications

Sears 139.53971SRT, 139.53968SRT, and 139.53960SRT are a series of garage door openers that have gained recognition for their reliability and advanced features. These models represent a shift towards smarter technology in home automation, providing homeowners with increased convenience, security, and control over their garage doors.

One of the standout features of these models is their Smart Technology integration. Each unit is equipped with the ability to connect to Wi-Fi, allowing users to control their garage doors remotely through a smartphone app. This means that you can open or close your garage door from anywhere, check its status, and receive notifications if the door is left open for an extended period. This feature enhances home security by providing real-time updates, giving users peace of mind when they are away from home.

The 139.53971SRT model is designed with a powerful motor that ensures smooth and quiet operation, making it suitable for homes with bedrooms adjacent to the garage. It features a built-in battery backup system, which is crucial during power outages, providing peace of mind that your garage door can still be operated.

Meanwhile, the 139.53968SRT and 139.53960SRT models come with a range of safety features such as the security keypad and 3-button remote control, which allow multiple users to gain access without the need for a physical key. The Smart Technology also incorporates advanced encryption protocols that help prevent unauthorized access, ensuring the garage remains secure.

Additionally, all three models are designed for easy installation and come with a variety of installation accessories. Their adaptability makes them compatible with a wide range of garage doors, enhancing their appeal for different homeowners.

In terms of longevity, the garage door openers are built with high-quality materials, promising durability and a longer lifespan. They also feature a noise-dampening design that minimizes operational sound, making them an excellent choice for residential applications.

Overall, the Sears 139.53971SRT, 139.53968SRT, and 139.53960SRT garage door openers combine modern technology with user-friendly features to offer a secure, efficient, and convenient garage solution for today's smart homes. Their innovative approach addresses the traditional needs of homeowners while embracing new technological advancements, making them a relevant choice in today's market.