Commercial HVAC
Anyone dealt with a rooftop unit cooling the space unevenly during occupied hours in Liverpool?
Asked by Sofia Hughesin Liverpool, England· 3/8/2026· 1568 views
I'm in Liverpool, England and dealing with a 6-year-old rooftop unit in our single-family home. Over the past few service calls, it has been cooling the space unevenly during occupied hours and we're now noticing our energy use jumped before the comfort issue became obvious.
One contractor quoted GBP 1,668 for repair, while another jumped straight to a GBP 17,458 replacement because of the age. The weather here has been dealing us cold overnight temperatures, 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 economizer settings, supply temperatures, occupancy schedules, and sensor calibration.
commercialrtucontrols
6 Answers
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 rooftop unit that is cooling the space unevenly during occupied hours, the first things I would ask for are economizer settings, supply temperatures, occupancy schedules, and sensor calibration. 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 Liverpool, England, pricing can move around, but the diagnostic process should still be clear.
22
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 rooftop unit that is cooling the space unevenly during occupied hours, the first things I would ask for are economizer settings, supply temperatures, occupancy schedules, and sensor calibration. 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 Liverpool, England, pricing can move around, but the diagnostic process should still be clear.
10
0
Before signing anything, I would ask the technician to show the readings and explain which number actually supports the recommendation. For a rooftop unit that is cooling the space unevenly during occupied hours, the first things I would ask for are economizer settings, supply temperatures, occupancy schedules, and sensor calibration. 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 Liverpool, England, pricing can move around, but the diagnostic process should still be clear.
9
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 rooftop unit in Liverpool. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Aria Brooks·3/8/2026
7
0
I would compare how clearly each contractor explains the diagnosis, not just the price. The clearer company ended up being the better hire for us. We had a related issue with our rooftop unit in Liverpool. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Grace Morgan·3/9/2026
4
0
I would compare how clearly each contractor explains the diagnosis, not just the price. The clearer company ended up being the better hire for us. We had a related issue with our rooftop unit in Liverpool. Once we forced every quote into the same format, the decision got much easier because the weak recommendations stood out immediately.
Nadia Walker·3/9/2026