Ductless Mini-Split
Anyone dealt with a mini-split cooling one room well but leaving the others behind in Montreal?
Asked by Priya Mitchellin Montreal, Quebec· 4/20/2026· 673 views
I'm in Montreal, Quebec and dealing with a 8-year-old mini-split in our older detached house. Over the past week, it has been cooling one room well but leaving the others behind and we're now noticing the system sounds normal at startup but never quite settles into a steady cycle.
One contractor quoted C$582 for repair, while another jumped straight to a C$10,134 replacement because of the age. The weather here has been dealing us deep winter heating 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 indoor head placement, line-set performance, fan speed, and zoning settings.
mini-splitairflowinstall
5 Answers
18
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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 mini-split that is cooling one room well but leaving the others behind, the first things I would ask for are indoor head placement, line-set performance, fan speed, and zoning settings. 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 Montreal, Quebec, pricing can move around, but the diagnostic process should still be clear.
10
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We had something similar and the turning point was asking each company for the actual readings in writing instead of a verbal explanation. We had a related issue with our mini-split in Montreal. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Mason Thompson·4/21/2026
9
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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 mini-split that is cooling one room well but leaving the others behind, the first things I would ask for are indoor head placement, line-set performance, fan speed, and zoning settings. 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 Montreal, Quebec, pricing can move around, but the diagnostic process should still be clear.
6
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We used the directory reviews to filter out firms that were vague about what they had actually tested. That saved us a lot of time. We had a related issue with our mini-split in Montreal. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Henry Murphy·4/20/2026
5
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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 mini-split that is cooling one room well but leaving the others behind, the first things I would ask for are indoor head placement, line-set performance, fan speed, and zoning settings. 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 Montreal, Quebec, pricing can move around, but the diagnostic process should still be clear.