DIY Patio Door Latch Repair: Quick & Easy Fix for Broken Springs

Updated at: 04/06/2025

Frustrated with a wobbly patio door that slams shut unexpectedly or refuses to stay open? The culprit might be broken or weakened springs within your door's latch mechanism. A malfunctioning latch not only impacts the smooth operation of your patio door but can also compromise your home's security and energy efficiency. Replacing the entire latch assembly can be costly and time-consuming, but thankfully, repairing the springs often involves a simple DIY fix. This is especially true for common spring-related issues that don't require specialized tools or extensive knowledge.

Forget expensive repair calls and enjoy the satisfying feeling of fixing things yourself. This guide will walk you through a quick and easy repair process, focusing specifically on addressing those problematic patio door springs. Ready to get started and restore your door to its former glory? Let's dive into the step-by-step instructions below.

Preparation and Safety Guidelines

Tools Needed
  • Walnut pick
  • Vice grips
  • Screwdriver
  • Replacement mortise latch
Safety Guidelines
  • Always disconnect the power to the door opener (if applicable) before starting any repairs. This prevents accidental injury or damage.
  • Use caution when handling springs. They are under tension and can cause serious injury if they suddenly release. Wear safety glasses.
  • If you are uncomfortable working with springs or are unsure about any step, consult a professional. Improper repair can lead to further damage or safety hazards.

Step-by-Step Instructions

  1. Handle Removal

    • Remove the exterior and interior handles by unscrewing the main screws. Hold the handles to prevent them from falling.
    Remove the exterior and interior handles by unscrewing the main screws. Hold the handles to prevent them from falling.
    Handle Removal

  2. Old Latch Removal

    • Slide out the lock lever.
    • Detach the mortise latch, using the vice grips to hold it in place.
    • Remove the old latch from the door frame.
    Remove the old latch from the door frame.Remove the old latch from the door frame.Remove the old latch from the door frame.
    Old Latch Removal

  3. Prepare New Latch

    • Attach vice grips to the hook of the new latch (clamp onto the flat part for a secure hold).
    Attach vice grips to the hook of the new latch (clamp onto the flat part for a secure hold).
    Prepare New Latch

  4. Install New Latch

    • Insert the new latch, angling it until both top and bottom parts slide into place. The vice grips help significantly with this step.
    • Attach the new latch using the included screws.
    • Remove the vice grips.
    Remove the vice grips.Remove the vice grips.Remove the vice grips.
    Install New Latch

  5. Reassembly

    • Insert the locking lever into the slot inside the door.
    • Reattach the handles. If screws are difficult to insert, loosen all screws to allow for wiggle room before tightening them again.
    Reattach the handles. If screws are difficult to insert, loosen all screws to allow for wiggle room before tightening them again.Reattach the handles. If screws are difficult to insert, loosen all screws to allow for wiggle room before tightening them again.
    Reassembly

Read more: 3M Thinsulate Window Film Installation: A Step-by-Step Guide

Tips

  • Measure the dimensions of the old latch before ordering a replacement.
  • If the handles' screws are difficult, loosen all of them to allow the assembly to wiggle before tightening.

Common Mistakes to Avoid

1. Incorrect Spring Tension

Reason: Applying too much or too little tension can lead to the latch not engaging properly or the spring breaking again.
Solution: Adjust the tension by carefully turning the adjustment screw until the latch engages smoothly and the door closes securely.

2. Ignoring Worn-Out Parts

Reason: Continuing to use worn rollers or a damaged strike plate will put stress on the new spring and lead to premature failure.
Solution: Replace any worn or damaged components, such as rollers and the strike plate, before installing the new spring.

3. Forcing the Latch

Reason: Trying to force the latch closed when it's not properly aligned or the spring is incorrectly installed can damage the mechanism further.
Solution: Ensure all parts are correctly aligned and the spring is installed according to instructions before attempting to close the latch.

FAQs

What tools do I need to repair my patio door latch springs?
You'll likely only need a screwdriver (Phillips and flathead are commonly used), possibly pliers, and a replacement spring if necessary. Check your specific door latch for exact requirements.
How do I know if it's the springs causing the problem, and not the latch itself?
If the door is hard to open or close, slams shut forcefully, or won't stay open, the springs are a likely culprit. If the latch mechanism is physically broken or damaged, spring repair might not be sufficient and replacement may be required.
Where can I find replacement springs if I need them?
You can often find replacement springs at home improvement stores, hardware stores, or online retailers. Take a picture of your existing spring before removing it to help with identification and matching.