Getting your garage door and opener ready for a hot El Niño summer

A hot summer is likely but not certain, and the best preparation is the routine the door makers already set: an operation check now, a professional service within your maker's interval, the right cleaner and lubricant for your door type, sealed gaps along the bottom and sides, and a technician for heavy doors, worn cables, springs and opener fault lights.

Before this summer's heat, make sure your garage door has had an operation check in the past three to six months and a professional service within its maker's interval. Put the makers' advice side by side and the shortest service interval is 12 months. Steel-Line recommends servicing every 12 months. Merlin recommends an annual door service. B&D recommends a professional service every two years. Dominator adds a check of door operation every 3 to 6 months, "more regularly in extreme environments or frequent use".

So a door that last saw a technician more than a year ago is overdue on two of those three service schedules. That holds whatever the weather does.

The weather is leaning hot. The Bureau of Meteorology's 22 October outlook gives eastern parts of NSW an over 70% chance of unusually high maximums for November to January.

At Garage Doors Lake Macquarie, our view is simple. A hot summer is a reason to do the routine the makers already set. It is not a reason to start pulling at springs.

How often do door makers say to check and service?

• B&D: professional service every 2 yearshttps://www.bnd.com.au/support/resources-for-owners/how-to-guide/how-to-clean-and-maintain-your-squeaky-garage-door-and-opener/
• Steel-Line: servicing every 12 monthshttps://www.steel-line.com.au/product-selection-guide/faq/
• Merlin: annual door servicehttps://www.gomerlin.com.au/proven-performance/
• Dominator: check door operation every 3 to 6 months, more regularly in extreme environments or frequent usehttps://www.dominatornsw.com.au/resources/door-care-maintenance

06121824

months

The answer depends on whose door and opener you have, so your manual sets your interval. What every maker agrees on is that the routine matters.

Skipping a service is not harmless: the warranty "may be void" if correct maintenance and servicing are not carried out, and failure to service "may result in warranty being voided".

Warranty terms are not one-size-fits-all either. Merlin says the servicing needed to keep an opener warranty valid varies by opener, so check your manual for what applies to yours.

What does the summer outlook actually say?

BOM outlook for November to January, issued 22 October 2026: chances, not certainties

• Above-average maximums, much of Australia: over 80%over
• Unusually high maximums, eastern parts of NSW: over 70%over
• Unusually high minimums, much of Australia: over 80% (more than 4 times normal)over
• Above-average rainfall, north-eastern NSW: 60% to over 80%over

0%20%40%60%80%100%

BOM: El Niño does not necessarily mean strong impacts.

The run-up has been warm. September 2026 was the warmest September on record, 1.02 °C above the 1961 to 1990 average.

For November to January, BOM says maximum temperatures are “very likely” above average, an over 80% chance across much of Australia. Nights are in the picture too. Unusually high minimums are over 80% likely for much of the country, "more than 4 times the normal likelihood". That points to warm nights with less overnight cooling.

Behind it, "A strong El Niño is underway", likely to peak around November to December "as a very strong event". The NSW Government flagged back in August "a high potential for a challenging summer".

Keep this honest. BOM gives chances, not certainties. It also says El Niño “does not necessarily mean strong impacts” on Australia's temperature and rainfall.

What does heat mean for a door that goes up and down several times a day? Openers are built for a range of conditions. Merlin, for example, says its openers are tested "from tropical humidity to arid dryness", including "the scorching heat of the outback". That is the maker's own claim.

We won't put a number on what a hot summer does to any particular opener. Whether a motor is labouring, a track is binding or lubricant has dried out are things a technician looks at on a service.

What can you check yourself, and what is a technician's job?

You can do this Technician only

1. Disengage the opener first (B&D)
2. Manual balance test, with opening and closing effort about the same (Dominator)
3. Look at the lifting cables for fraying or corrosion, never adjust them (Dominator)
4. Springs are under tension at all times, adjusted only by trained dealers (Dominator)
5. Clean the guides if the motor is slow, otherwise call a technician (Steel-Line)
6. Wash the door's outside with clean water, more often near the coast (B&D, Dominator)
7. Wash the door, not the opener (Dominator)
8. Test the remote and the safety beam

Work through the door in this order.

1. Disengage the opener first. B&D says to always disengage the opener before cleaning or maintaining the door.

2. Do the balance test. With the opener in manual mode, lift and lower the door by hand. Dominator says manual opening and closing effort should feel about the same.

3. If it's heavy, stop there. "It is natural for springs to lose tension", says Dominator, and if the door gets hard to operate, contact a technician. Steel-Line says a door that is "heavy to lift" may need its spring tension adjusted, which is also a technician's call. The spring unit is under tension at all times and should only be adjusted by trained dealers.

4. Look at the cables, don't touch them. Check the lifting cables for fraying or corrosion and never adjust them yourself.

5. A slow motor starts with the guides. Steel-Line says a slow motor means cleaning the guides. If that doesn't fix it, call a technician.

6. Wash the door. B&D suggests washing the outside with clean water and a soft cloth about monthly, more often in coastal areas. For pre-painted steel doors, Dominator says about every 14 days, more often in salty areas. Our guide to salt, humidity and door lifespan explains why the lake and the coast change the routine.

7. Leave the opener dry. Hosing the opener is the wrong way to clean it: washing it "will void the warranty and could cause electrocution". Wash the door, not the opener.

8. Test the remote and the safety beam. Re-engage the opener. Check the remote works from where you normally press it. Check the door stops and reverses when something breaks the beam.

If your opener has a backup battery, Merlin notes it is typically a 12V rechargeable one specific to the model, and the manual tells you which. Our page on openers in power outages covers what that battery is for.

A spring that has simply worn is usually not an insurance matter. AAMI lists wear on springs from constant use among its examples of wear and tear. Our guide to wear and tear versus storm damage covers the rest. For what's safe to tackle yourself more broadly, see Garage Door DIY: What's Safe and What Isn't.

Which lubricant goes where?

There is no one lubricant for every door. On rolling-door guide tracks one maker says "DO NOT USE GREASE OR OIL", while another puts dry silicone spray on rollers, hinges and tracks of sectional doors.

Read down the table and the makers don't agree on every part. That is why your own door's manual wins over any general rule, including ours.

Springs stay under tension at all times. Keep hands and tools away from any spring adjustment.

What is your opener's flashing light telling you?

A flashing or beeping opener is usually telling you something specific. The code depends on the brand.

On B&D openers, if the opener flashes 9 times, it has overloaded or stalled, and B&D says to call for a service. B&D also says its service-light flash is the most common reason for beeping or flashing.

On Steel-Line's roller-door openers, a flashing control-box light means a preset number of cycles has occurred and the unit needs servicing.

If an opener stalls on a hot afternoon, it's tempting to blame the weather. Don't guess. For an overload or stall, the maker's advice is a service call, whatever the cause turns out to be. For other brands, the manual lists the codes.

Why do gaps around a garage door matter in bushfire season?

The NSW statutory Bush Fire Danger Period runs 1 October to 31 March, though it may vary locally. For most of NSW it begins 1 October, so we're already in it.

The RFS says "85% of houses are lost from ember attack". Ember attack can happen over 100 metres from the fire front. Gaps, cracks and places where debris lodges "significantly reduce" a building's resistance. A garage door has a bottom edge and two sides where all three can happen. For existing homes, the RFS recommends upgrades rather than making them mandatory.

The NSW Government's home-prep list includes "Fit seals around doors and windows to eliminate gaps", keeping flammable items and debris cleared, and checking your insurance is up to date.

For the door, that means two things. Sweep leaves and bark away from the threshold. Check the bottom and side seals still sit tight. Our weather seals guide covers seal types.

None of this makes a door bushfire-proof. It deals with the gaps and fuel the RFS warns about.

Does a hot summer rule out storms?

No. Hot does not mean dry. BOM says north-eastern NSW is likely (60% to over 80%) to see above-average rainfall from November to January, with the wet signal strengthening in the east during December.

So this summer could bring heat, fire danger and storms all at once. The storm season checks still apply. So does our guide to hail damage on your garage door. If heat in the garage itself is your main worry, our garage door insulation guide covers that.

The summer checks at a glance

The outlook

• Over 70% chance of unusually high Nov to Jan maximums, eastern parts of NSW (BOM)
• Over 80% chance of unusually high minimums, much of Australia (BOM)

The door

• Check operation every 3 to 6 months, more regularly in extreme environments or frequent use (Dominator)
• Professional service every 12 months (Steel-Line, Merlin annual) or every 2 years (B&D) (Steel-Line, Merlin, B&D)
• Door heavy to lift means a technician (Dominator, Steel-Line)

The gaps

• Bush Fire Danger Period 1 October to 31 March, may vary locally (RFS)
• 85% of houses are lost from ember attack (RFS)
• Fit seals around doors and windows to eliminate gaps (NSW Government)

The outlook: an over 70% chance of unusually high maximums across eastern parts of NSW, and warm nights likely.

The door: an operation check every 3 to 6 months, more regularly in extreme environments or frequent use. Then a professional service on your maker's interval, which is every 12 months for Steel-Line, annual for Merlin and every two years for B&D.

The gaps: seals tight and debris cleared through a Bush Fire Danger Period of 1 October to 31 March, which may vary locally.

Your next step before the heat

Do the balance test this weekend. It takes a minute with the opener in manual mode.

Then book a technician in any of these cases:

• the door feels heavy
• a cable looks frayed
• the opener is flashing a fault
• you can't remember the last service

Tell Garage Doors Lake Macquarie your door type, your opener brand and what you've noticed through our enquiry page. You can see what a visit covers on the service and tune-up page.