SolvedAC Installation
Anyone dealt with a replacement cooling system coming in with very different tonnage and pricing in Adelaide?
Asked by Claire Pricein Adelaide, South Australia· 3/23/2026· 507 views
I'm in Adelaide, South Australia and dealing with a 13-year-old replacement cooling system in our townhouse. Over the past week, it has been coming in with very different tonnage and pricing and we're now noticing the system sounds normal at startup but never quite settles into a steady cycle.
One contractor quoted A$1,672 for repair, while another jumped straight to a A$8,218 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
8 Answers
35
✓ Accepted Answer
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.
Ella Singh·3/23/2026
34
0
The price range alone does not tell you enough. Ask what was tested, what failed, and which assumptions are built into the quote. 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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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.
32
0
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.
29
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From a contractor side, I would not approve a major repair or replacement without test results that line up with the symptoms. 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.
23
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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.
14
0
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·3/23/2026
10
0
From a contractor side, I would not approve a major repair or replacement without test results that line up with the symptoms. 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.