From the first phone call to the final safety test, Overhead Door extension spring replacement in Dover, NH follows a simple process: diagnose, quote, repair, test. Side-mounted extension springs replaced in matched pairs, with safety cables installed. Whether your Overhead Door garage door is a few years old or a few decades, we can diagnose it and tell you honestly whether it is worth repairing. Overhead Door traces its roots to C.G. Johnson, who invented the upward-acting garage door in 1921. The company builds residential and commercial doors and openers.
Safety first: springs and cables hold hundreds of pounds of tension. Don't try to adjust or remove them yourself, and don't run the opener on a door that's crooked or has a broken spring.
Is it time for Overhead Door extension spring replacement?
- A stretched, sagging or snapped spring along one of the horizontal tracks
- The door lifts unevenly or sits crooked
- A missing or broken safety cable through the spring
- Pulleys squealing or wobbling
What usually causes it
- Metal fatigue from years of stretching
- Rust and worn pulleys
- Mismatched springs from an earlier repair
Before the technician arrives
- Make sure each extension spring has a safety cable running through it. That cable keeps a snapped spring from flying across the garage.
- Look at the pulleys and cables for fraying.
- Don't try to stretch or re-hook an extension spring under tension.
Still stuck? Our free symptom checker and troubleshooting wizard walk you through it step by step.
Our Overhead Door extension spring replacement process
- Open the door fully and secure it so spring tension is released
- Replace both springs as a matched pair, color-coded for door weight
- Replace worn pulleys and lift cables if needed
- Install or replace the safety containment cables
- Balance the door and test it through several cycles
How much does Overhead Door extension spring replacement cost?
What moves the price:
- Door size and weight (single or double, steel or wood)
- Which parts need replacing and whether they are in stock
- Spring type and cycle rating
- Emergency or after-hours timing
These are typical U.S. ranges, not a quote. You get an exact price for your door before any work starts. For a quick estimate, try the repair cost calculator.
Other Overhead Door services
- Overhead Door Garage Door Repair
- Overhead Door Torsion Spring Replacement
- Overhead Door Garage Door Cable Repair
- Overhead Door Garage Door Roller Replacement
- Overhead Door Garage Door Track Repair
- Overhead Door Off-Track Garage Door Repair
- Overhead Door Garage Door Panel Replacement
- Overhead Door Weather Seal Replacement
- Overhead Door Garage Door Installation
- Overhead Door Garage Door Opener Repair
- Overhead Door Garage Door Opener Installation
- Overhead Door Smart Garage Door Opener Setup
- Overhead Door Remote & Keypad Programming
- Overhead Door Garage Door Sensor Repair
- Overhead Door Opener Gear & Sprocket Replacement
- Overhead Door Opener Circuit Board Replacement
- Overhead Door Commercial Garage Door Repair
- Overhead Door Rolling Steel Door Repair
- Overhead Door Commercial Door Operator Repair
- Overhead Door Rolling Fire Door Inspection & Drop Testing
Local Overhead Door extension spring replacement for Dover, NH
In New Hampshire, spring failures spike during cold snaps, when worn steel is at its most brittle. If your springs are near the end of their cycle life, replacing them before winter is cheaper than an emergency call on the coldest morning of the year.
Close to the coast, salt air speeds up corrosion. Galvanized or coated springs, nylon rollers and stainless hardware hold up better than bare steel.
Besides Dover (ZIP codes 03820, 03821 and 03822), we handle Overhead Door extension spring replacement in Rollinsford (3.8 mi), South Berwick, ME (4.1 mi), Somersworth (4.4 mi) and Berwick, ME (4.7 mi). Call (833) 435-8883 to book a visit in Dover.
Overhead Door Extension Spring Replacement: frequently asked questions
How much does Overhead Door extension spring replacement cost in Dover, NH?
Overhead Door Extension Spring Replacement typically costs $150-$350 including parts and labor, and usually takes 1-1.5 hours. The exact price depends on your door and the parts it needs, and you get it before any work starts. Call (833) 435-8883 for a quote.
Can you do Overhead Door extension spring replacement the same day?
Often, yes. When a technician is available we can usually come the same day, and common parts are carried on the truck. Doors that won't close or have a broken spring are treated as priority calls, and emergency service is available.
Is Overhead Door extension spring replacement covered by a warranty?
Our work comes with a 90-day labor warranty on repairs. New parts and doors also carry the manufacturer's warranty, and Overhead Door warranty terms vary by product and age. Ask for the warranty details in writing with your quote.
Are your technicians licensed and insured?
Our technicians are insured, and where New Hampshire or Dover requires a contractor license for garage door work, the job is done under that license. You're welcome to ask for proof when you book.
Should I repair or replace my garage door?
A good rule of thumb: if the repair costs more than about 50% of a replacement, or the garage door is near the end of its life, replace it. A garage door typically lasts 15 to 30 years. If several panels are damaged, the door is rusted through or rotted, or parts are discontinued, replacing it is often better value. Springs are the exception: a broken spring is always replaced, never repaired. Our free repair vs. replace calculator can help you compare.