Fill out the form below and a member of our team will reach out to you as soon as possible.
Holliston is a tight-knit town with a strong sense of place, and its homes reflect that, ranging from mid-century ranches and split-levels along quiet residential streets to larger colonials and newer builds closer to the Milford and Ashland town lines. What connects them all is the same challenge every MetroWest homeowner faces: humid, unpredictable summers that push cooling systems hard.
Pro Comfort Control serves Holliston and the surrounding region with experienced, certified HVAC technicians who give straight answers and get the work done right. We don’t overcomplicate it. You call, we come out, we fix it.
Our team repairs central air conditioning systems, ductless units, and heat pumps across all major equipment types. We start every visit with a thorough diagnostic rather than making assumptions, because two systems showing the same symptoms can have entirely different root causes.
Holliston’s housing stock leans toward mid-century and late 20th-century construction, which means a lot of homes have ductwork and equipment that has been in service for a long time. We pay attention to the condition of the whole system, not just the component that visibly failed. That approach saves our customers from repeat service calls and unexpected breakdowns mid-summer. We’ll tell you what we found, what needs fixing now, and what to keep an eye on going forward.
These are the signals Holliston homeowners should take seriously before the hottest days of summer.
In a town where homes are spread out and neighbors aren’t always close by, catching these signs early means not getting stuck without cooling during a heat wave with a long wait for service.
Holliston’s geography includes a number of ponds and wetlands, particularly around Lake Winthrop and Goodwill Park, and those water features contribute to elevated humidity levels across the town during summer. That moisture load affects how hard air conditioners have to work, and it accelerates wear on components like evaporator coils and condensate drain systems that are already managing a lot of moisture.
The town’s split-level and ranch-style homes from the 1960s and 1970s often have ductwork that was installed in a single run without zoning, meaning the system has to push conditioned air throughout the whole house at once. That puts more demand on the blower and compressor. Combined with older insulation that allows more heat gain through walls and attics, these homes can be a challenge to keep comfortable. We frequently find low refrigerant from aging line sets, failed run capacitors, and dirty blower wheels as the main culprits on Holliston service calls.
Last summer we got a call from Kevin, a homeowner near Lake Winthrop in Holliston. His split-level had been struggling to keep the lower level cool, and the upstairs was actually fine. He’d assumed the layout was the issue and had been living with it for two summers.
Our technician found the problem wasn’t the layout at all. A zone damper had failed in a partially closed position, which was choking off airflow to the lower level registers. On top of that, the blower wheel had a significant buildup of dust and debris that was reducing overall system output. We repaired the damper, cleaned the blower assembly, and ran the system through a full cycle to confirm airflow balance before leaving. Kevin was surprised how much of a difference it made and mentioned he wished he’d called us two years earlier. That’s a common thing we hear.
Holliston residents want someone they can trust to show up, do good work, and be straight with them. That’s what we do.
From the first call to the final invoice, we make the process as straightforward as possible.
Uneven cooling usually points to ductwork issues, a failed zone damper, a dirty blower, or refrigerant problems. In split-level homes like many in Holliston, layout can compound the issue, but the root cause is almost always mechanical.
Properties near water sources like Lake Winthrop experience higher ambient humidity, which increases the workload on your air conditioner. This can lead to more frequent coil icing, clogged drain lines, and shorter equipment lifespan without regular maintenance.
No. Refrigerant handling requires EPA certification and specialized equipment. Adding refrigerant without addressing the underlying leak also means you’ll be in the same situation again within a season or two.
A run capacitor helps start and maintain operation of the compressor and fan motors. Heat and age degrade them over time, and they’re one of the most commonly replaced components in aging AC systems. Replacement is straightforward and relatively affordable.
In most cases, yes. A maintenance visit catches small problems before they become expensive repairs, improves efficiency so your energy bills stay lower, and extends the lifespan of the equipment. Our membership plan makes it easy to stay on schedule.
Fill out the form below and a member of our team will reach out to you as soon as possible.
