A standard HVAC maintenance checkup from Done covers a thorough inspection and tune-up of your heating and cooling system from top to bottom. Our technicians test electrical components, check refrigerant levels, clean key parts, and verify that the system is operating safely and efficiently. Most visits take one to two hours and leave your system running noticeably better than when we arrived.
What We Check During a Cooling or AC Tune-Up
When we service your air conditioner or heat pump, we go through a detailed checklist that covers both the indoor and outdoor portions of the system. At Denver’s mile-high altitude, refrigerant pressures behave differently than at sea level, so our technicians are trained specifically for Colorado conditions rather than relying on generic charts.
- Inspect and clean the evaporator and condenser coils
- Check and record refrigerant charge — top off if needed and if the system is not sealed
- Test capacitors, contactors, and all electrical connections
- Measure supply and return air temperatures
- Clear the condensate drain line to prevent water damage or mold growth
- Inspect blower motor and fan blades for wear
- Check thermostat calibration and staging
- Inspect ductwork connections visible at the unit
What We Check During a Heating or Furnace Tune-Up
Furnace maintenance in Colorado is especially important because our cold snaps can be severe and sudden — a furnace that hasn’t been serviced is far more likely to fail on the coldest night of January. During a heating checkup we inspect the heat exchanger for cracks (a cracked heat exchanger can allow carbon monoxide to enter your living space, which is a serious safety concern), test ignition and flame sensors, check gas pressure, and measure temperature rise across the heat exchanger to confirm it falls within manufacturer specs.
We also lubricate moving parts, check the flue and venting for obstructions, test limit switches, and verify that the blower is moving enough airflow for your home’s layout. At altitude, combustion air requirements differ from lower-elevation installations, and we account for that in our inspection.
Filter, Indoor Air Quality, and General System Checks
Every visit includes a filter inspection. Colorado’s dry, dusty air — plus wildfire smoke season — means filters here can load up faster than homeowners expect. We’ll let you know if your current filter is restricting airflow and recommend an appropriate replacement. We also check for any signs of mold or moisture in the air handler cabinet, inspect accessible ductwork for leaks or disconnected sections, and note anything that looks like it could become a problem before your next visit.
If your home has a whole-home humidifier, UV air purifier, or other indoor air quality equipment tied into the HVAC system, we can inspect those as well during the visit. Denver’s climate is notoriously dry, and a properly functioning whole-home humidifier can make a significant difference in comfort and health during winter months.
What You Get After the Visit
At the end of every maintenance visit, your technician will walk you through what was found, what was done, and what — if anything — needs attention in the near term. We don’t use scare tactics or manufacture urgency. If something is fine, we’ll tell you it’s fine. If something legitimately needs repair or is approaching end of life, we’ll explain it honestly with options and pricing so you can make an informed decision.
Regular tune-ups also keep manufacturer warranties valid, improve energy efficiency (a dirty system works harder and costs more to run), and extend the overall life of your equipment — all of which matter in Colorado where systems run hard during both hot summers and cold winters.
How to Make the Most of Your Maintenance Visit
Consider enrolling in Done’s Care Club maintenance membership so your tune-ups are scheduled automatically and you get priority service, discounts on repairs, and other member perks. Whether you want a one-time checkup or ongoing coverage, our AC maintenance and furnace maintenance services are a straightforward way to protect one of the biggest investments in your home.
