Airoheat compressor and fan faults
The heat pump quietly falls back to the boost element, so you still get hot water and only notice the power bill. Worth checking the fan actually runs during a heating cycle.
Brand specialists
Dux hot water — Darwin.
Long-life stainless tanks and quiet, efficient heat pumps. We service the full Dux range and can advise on genuine like-for-like replacement.
What we service
Every Dux system.
- Electric storage
- Gas storage
- Airoheat heat pump
- Sunpro solar
About the brand
Dux has built hot water systems for Australian conditions since 1915, including stainless steel cylinders suited to varied water quality.
Warranty, in plain terms
Stainless cylinders generally carry longer cylinder cover than vitreous enamel models. Sacrificial anode maintenance affects enamel tank warranties.
Parts we carry
Elements, thermostats, anodes and heat pump controllers for common Dux models.
Typical lifespan
Dux stainless cylinders often pass 12–15 years; the Airoheat heat pump is generally planned around 10–15 years.
Weighing up whether to fix or replace a Dux unit? Read our repair or replace guide and the Darwin replacement cost guide. If you have no hot water right now, start with the no hot water troubleshooting guide or call for emergency hot water help.
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Request a quote
Tell us what's happening
Answer a couple of quick questions so we can get your hot water sorted.
Prefer to speak now? Call (08) 8911 6093
Common Dux faults in Darwin homes
Leaking stainless weld seam
Stainless tanks rarely rust through, but a failed weld seam is not repairable and shows as a persistent damp patch under the unit.
Thermostat drift on Proflo tanks
Water that has become noticeably hotter or cooler without anyone touching it usually means the thermostat is out of calibration rather than an element fault.
Condensate drain blockages
Airoheat units installed outdoors accumulate leaf litter in the condensate line — a two-minute homeowner check that prevents pooling around the base.
When replacing beats repairing
A stainless Dux with a sound cylinder is worth repairing well past ten years. An Airoheat needing compressor or refrigerant work out of warranty is usually better replaced.
Our repair or replace guide sets out the full decision, and the Darwin replacement cost guide explains what changes the price. Symptoms are covered in common hot water problems and the hot water FAQ.
Dux work, done by specialists.
Licensed, insured plumbers servicing, replacing and installing Dux systems — with the fault, the options and the price explained before anything is agreed.
Licensed & insured
Hot water work is carried out by Northern Territory licensed, insured plumbers — with the paperwork you need for warranty claims.
Hot water specialists
We work on hot water every day: storage, continuous flow, heat pump and solar, across all the major Australian brands.
Fast, prioritised response
Urgent no-hot-water and leak calls are prioritised, with same-day service wherever the day allows.
Questions
Dux hot water questions.
What warranty comes with a Dux hot water system?
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Stainless cylinders generally carry longer cylinder cover than vitreous enamel models. Sacrificial anode maintenance affects enamel tank warranties.
How long does a Dux hot water system last?
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Dux stainless cylinders often pass 12–15 years; the Airoheat heat pump is generally planned around 10–15 years.
Can you get Dux parts?
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Elements, thermostats, anodes and heat pump controllers for common Dux models.
Should I repair or replace my Dux system?
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A stainless Dux with a sound cylinder is worth repairing well past ten years. An Airoheat needing compressor or refrigerant work out of warranty is usually better replaced.
Do you install Dux systems as well as repair them?
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Yes — we repair, replace and install Dux systems. Where we supply and install the unit, the product and the workmanship sit with one team, which makes any later warranty work simpler.
Next steps: Dux repairs, replacement, installation or our service areas.
Need a Dux system looked at?
Tell us the model and the symptom — or the error code if the unit shows one — and we'll diagnose the fault properly, then explain whether repair or replacement makes more sense for your Dux system before any work begins.
- Same-day service where available
- Fixed-price quotes before work starts
- Licensed and insured
- All major brands serviced
Call now — (08) 8911 6093Request a quote
Servicing Darwin City, the Northern Suburbs, Palmerston and the rural area across the Top End.
Ready to get your hot water sorted?
Send through a quick enquiry and we'll get back to you fast to help sort your hot water.