SolvedAC Installation
Repair or replace a 14-year-old replacement cooling system in Adelaide?
Asked by Claire Pricein Adelaide, South Australia· 3/14/2026· 917 views
I'm in Adelaide, South Australia and dealing with a 14-year-old replacement cooling system in our semi-detached home. Over the last month, it has been coming in with very different tonnage and pricing and we're now noticing the upstairs stays noticeably worse than the main floor.
One contractor quoted A$1,906 for repair, while another jumped straight to a A$17,459 replacement because of the age. The weather here has been dealing us hot afternoon cooling demand, so I do not want to wait too long, but I also do not want to approve the wrong scope.
If you were comparing bids on this, what would you want checked first? I especially want to know how much weight you would give to load calculation, duct condition, insulation assumptions, and line-set reuse.
replacementsizingpricing
6 Answers
36
✓ Accepted Answer
If this landed on my schedule, I would want to document the core readings first and then explain exactly why the repair does or does not make economic sense. For a replacement cooling system that is coming in with very different tonnage and pricing, the first things I would ask for are load calculation, duct condition, insulation assumptions, and line-set reuse. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Adelaide, South Australia, pricing can move around, but the diagnostic process should still be clear.
33
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Before signing anything, I would ask the technician to show the readings and explain which number actually supports the recommendation. For a replacement cooling system that is coming in with very different tonnage and pricing, the first things I would ask for are load calculation, duct condition, insulation assumptions, and line-set reuse. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Adelaide, South Australia, pricing can move around, but the diagnostic process should still be clear.
15
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If you can, ask whether they checked airflow before recommending equipment. We nearly replaced a system when the bigger issue was elsewhere. We had a related issue with our replacement cooling system in Adelaide. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Isla Walker·3/14/2026
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The recommendation should be tied to measurements, not just the age of the equipment. Age matters, but it is not a diagnosis on its own. For a replacement cooling system that is coming in with very different tonnage and pricing, the first things I would ask for are load calculation, duct condition, insulation assumptions, and line-set reuse. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Adelaide, South Australia, pricing can move around, but the diagnostic process should still be clear.
11
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The recommendation should be tied to measurements, not just the age of the equipment. Age matters, but it is not a diagnosis on its own. For a replacement cooling system that is coming in with very different tonnage and pricing, the first things I would ask for are load calculation, duct condition, insulation assumptions, and line-set reuse. If the contractor is recommending bigger work, ask them to explain which measurement supports that recommendation and whether they ruled out airflow or controls first. In Adelaide, South Australia, pricing can move around, but the diagnostic process should still be clear.
3
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If you can, ask whether they checked airflow before recommending equipment. We nearly replaced a system when the bigger issue was elsewhere. We had a related issue with our replacement cooling system in Adelaide. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Sophia Parker·3/15/2026