When in doubt, don’t risk it. A small repair bill is nothing compared to the cost of replacing your entire rig or dealing with a roadside emergency in the middle of nowhere.
The Big Lap teaches you to be resourceful and self-reliant. You learn to fix things with zip ties, gaffer tape, and whatever’s in your toolbox. But there’s a line between being handy and being dangerous, and crossing it can turn a minor repair into a major disaster that ends your trip early.
Some repairs look deceptively simple but involve critical safety systems or require specialised knowledge and tools. Getting them wrong can cause fires, gas leaks, structural failures, or expensive damage that insurance won’t cover if they discover DIY work was involved.
Here’s when to swallow your pride, open your wallet, and call a professional.
Gas System Repairs
Gas systems are the most dangerous thing in your caravan. A botched repair can cause explosions, fires, or carbon monoxide poisoning. Even experienced tradies can get gas work wrong, which is why it requires specific licensing in Australia.
Never attempt these gas-related repairs yourself:
- Installing or replacing gas appliances (hot water, heating, cooking)
- Repairing or replacing gas lines, regulators, or fittings
- Fixing gas leaks beyond tightening an obviously loose connection
- Any work on the gas bottles themselves beyond changing them over
- Modifying gas installations or adding new outlets
Only licensed gas fitters can work on LPG systems legally. Insurance companies will refuse claims if unlicensed work caused the damage, and you could face prosecution if someone is injured.
If you smell gas, turn off the bottles immediately, ventilate the area, and don’t use any electrical switches or naked flames until a professional has checked the system. The temporary inconvenience is nothing compared to the alternative.
Keep a gas leak detector spray in your toolkit. It’s cheap insurance for checking connections when you change bottles or suspect a leak.
240V Electrical Work
240V mains electricity can kill you instantly. Unlike 12V systems where the worst you’ll get is a small shock, mains voltage will stop your heart if you make contact with live wires.
Leave these electrical jobs to licensed electricians:
- Installing or replacing 240V outlets, switches, or light fittings
- Any work inside the electrical panel or consumer unit
- Installing or repairing mains-powered appliances like air conditioners
- Fixing electrical faults that trip the safety switch repeatedly
- Running new 240V cables or circuits
- Connecting to external power at caravan parks (beyond plugging in)
The rules around electrical work vary by state, but generally, only licensed electricians can work on anything connected to 240V power. This includes seemingly simple jobs like replacing a power outlet or installing a new light.
Even if you know what you’re doing with electrical work, caravan wiring is often cramped and non-standard. What looks like a simple job can hide dangerous surprises.
Major Structural Damage
Caravans look simple but their structural engineering is more complex than it appears. The chassis, drawbar, and body are designed to work together as a system, and bodged structural repairs can make your van unsafe to tow.
Get professional help for these structural issues:
- Cracks in the chassis or drawbar
- Bent or damaged A-frame or coupling
- Floor damage that affects structural integrity
- Major body damage from accidents or tree strikes
- Suspension mounting point damage
- Any damage that affects the van’s stability while towing
A qualified caravan repairer or engineer needs to assess whether the damage compromises safety. They’ll also know how to maintain the van’s compliance with Australian Design Rules, which is important for insurance and registration.
Take photos of any structural damage before temporary repairs. Your insurance company will want to see the extent of the original damage when you make a claim.
Brake and Suspension Systems
Your caravan’s brakes and suspension are critical safety systems. Getting them wrong can cause accidents that injure you and other road users, and the legal liability is severe if faulty brakes cause a crash.
Professional brake and suspension work includes:
- Replacing brake pads, shoes, or discs
- Bleeding or replacing brake fluid
- Repairing hydraulic brake lines or electric brake wiring
- Adjusting or replacing electric brake controllers
- Suspension spring or shock absorber replacement
- Wheel bearing replacement or adjustment
While some of this work isn’t legally restricted, it requires specialised tools and knowledge. Brake systems in particular need precise adjustment and proper bleeding procedures that are difficult to get right without experience.
If your caravan brakes fail and cause an accident, police and insurance investigators will examine the brake system. DIY brake work that contributed to the failure could result in criminal charges.
Air Conditioning Refrigerant Work
Air conditioning systems contain refrigerant gases that are harmful to the environment and dangerous to handle incorrectly. Professional refrigeration mechanics need special licenses to buy and handle these gases.
Air conditioning work requiring professionals includes:
- Repairing refrigerant leaks
- Recharging the system with refrigerant
- Replacing compressors or other sealed components
- Any work that involves opening the refrigerant circuit
You can clean filters, check electrical connections, and replace obviously faulty fans, but anything involving the refrigerant system needs professional attention.
If your air con stops cooling, check the obvious things first: clean filters, check power, and make sure vents aren’t blocked. Many “air con failures” are actually maintenance issues.
Roof and Water Damage Repairs
Water damage is the silent killer of caravans. What starts as a small leak can quickly become thousands of dollars in structural damage, and improper repairs often make the problem worse by trapping moisture inside walls.
Professional roof and water damage work includes:
- Repairing major roof membrane damage
- Replacing water-damaged structural timbers
- Fixing leaks around air conditioners or roof vents
- Any repair involving removing and replacing wall panels
- Addressing water damage that’s spread beyond the obvious leak point
Small roof punctures can be temporarily sealed with appropriate products, but proper repairs often require removing fittings, cleaning and preparing surfaces properly, and using professional-grade materials that bond correctly to the roof membrane.
Water damage is progressive. The longer you leave it, the more expensive it becomes. Get professional assessment quickly, even if you plan to do temporary repairs first.
When DIY Is Usually Okay
Not everything needs a professional. These repairs are generally safe for competent DIYers with the right tools:
- 12V electrical work (lights, fans, water pumps)
- Plumbing repairs using push-fit fittings
- Interior trim and cabinet repairs
- Window and door adjustments
- External awning repairs and adjustments
- Basic bodywork and paint touch-ups
- Replacing taps, shower heads, and non-electrical appliances
The key is being honest about your skill level and having the right tools. A bodged DIY repair often costs more to fix properly than the original professional job would have cost.
Start with simple repairs to build your skills and confidence. Don’t attempt complex work under time pressure when you’re trying to get back on the road quickly.
Finding Help on the Road
Finding qualified tradespeople when you’re in remote areas can be challenging. Here’s how to get help when you need it:
Plan ahead: Research service providers along your route before you travel. Major towns usually have caravan repairers, but remote areas might require travelling to find help.
Use caravan networks: Other Big Lappers are your best resource for recommendations. Facebook groups and forums are full of recent experiences with repairers in different towns.
Contact manufacturers: Many caravan and appliance manufacturers maintain lists of authorised service agents. This is particularly useful for warranty work.
Emergency services: For gas or electrical emergencies, local emergency services can often recommend qualified tradespeople who can respond quickly.
Mobile services: Some tradespeople specialise in mobile caravan repairs and will come to you. This is more expensive but saves the hassle of unhitching and finding somewhere to stay.
Keep a folder with your caravan’s manual, warranty information, and service history. Professional repairers work faster when they have this information upfront.
- Never attempt gas, 240V electrical, or brake system repairs yourself – the risks are too high
- Major structural damage and water damage require professional assessment to prevent bigger problems
- DIY is generally safe for 12V electrical, plumbing with push-fit fittings, and interior repairs
- Plan ahead by researching service providers along your route before problems occur
- When in doubt, get professional help – a small repair bill beats a major disaster
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