Hot water systems typically last 8–12 years depending on the type and how well they’ve been maintained. Whether repair or replacement makes sense comes down to two things: the age of your unit and the cost of the fix.
When a repair makes sense
If your system is within the 8–12 year range and experiencing issues like inconsistent temperature, rusty water, or strange noises, a repair may get you a few more years — particularly if it’s the first fault the unit has had. Common repairable faults include failed thermostats, heating elements, valves and igniters.
When replacement is the smarter investment
- The unit is over 10 years old — further faults become increasingly likely, and efficiency drops with age
- The repair cost exceeds 50% of a new unit — you’re paying old-system prices for new-system money
- It’s the second or third repair — repeat faults are a strong signal the unit is at end of life
- The tank itself is leaking — tank corrosion can’t be repaired economically
How we help you decide
We’ll inspect your system, explain what’s actually wrong in plain English, and give you a fixed quote for both repair and replacement so you can make an informed decision — no pressure either way. If replacement is the right call, we’ll walk you through the system types and brands we install and what suits your household. Most like-for-like replacements are done the same day.
Explore our hot water services or call 1800 349 338 for advice now.