An HVAC maintenance plan — a service agreement — is an annual arrangement that schedules and documents preventive service on your equipment: a cooling visit in spring and a heating visit in fall. We offer them for homes and for commercial buildings, on every brand, whether or not we installed the system.
Why does Columbia need twice-yearly service?
Because mid-Missouri has two demanding seasons rather than one. Columbia averages 5,024 heating degree days and 1,248 cooling degree days a year; January alone accounts for 1,094 HDD and July for 382 CDD, with a normal January low near 21°F and a normal July high near 88°F. Neither half of your system gets a quiet year, and a heat pump runs in both.
That matters because HVAC failures cluster at the start of a season — the first hard freeze and the first stretch above 90°F — which is exactly when every contractor in town is booked. Maintenance moves the discovery of a weak capacitor or a plugged drain to a calm Tuesday in April.
What does a maintenance visit cover?
| Spring — cooling visit | Fall — heating visit |
|---|---|
| Condenser and evaporator coil condition | Burner and flame sensor cleaning |
| Refrigerant charge verified by superheat and subcooling | Heat exchanger inspection |
| Contactor, capacitor and electrical connections | Gas pressure and combustion check |
| Condensate drain, trap and safety switch | Ignitor, inducer and safety controls |
| Blower wheel condition and airflow | Temperature rise across the heat exchanger |
| Supply-to-return temperature split | Condensate drain and neutralizer on condensing furnaces |
| Thermostat operation and filter check | Thermostat operation and filter check |
What goes wrong when maintenance gets skipped?
- Plugged condensate drains — the safety switch shuts the system down, or the pan overflows into a ceiling
- Dirty coils — a condenser packed with cottonwood raises head pressure and shortens compressor life
- Weak run capacitors — cheap to replace on a scheduled visit, a no-cooling call at 4 p.m. in July
- Dirty flame sensors and burners — the most common cause of a furnace that lights and immediately shuts down
- Loaded blower wheels — airflow drops quietly until rooms stop keeping up
- Unnoticed heat exchanger damage — the one failure you want found on an inspection, not in February
- Loose electrical connections — a slow path to a burned contactor or a failed board
Not every problem is preventable. When something does fail, 24/7 emergency service is available with no extra fees for nights or weekends, and furnace repair or A/C repair is a phone call away.
Does maintenance protect my warranty?
Usually, yes. Most manufacturers make documented annual maintenance a condition of the parts warranty, and a declined claim on a compressor or heat exchanger costs far more than years of service visits. A service agreement produces the record as well as the service — which also matters if you bought high-efficiency equipment to reach a rebate tier and want it holding that efficiency. If you are weighing service against replacement on an older system, our repair-or-replace guide lays out the decision.
What else can lower your operating cost?
Maintenance itself is not rebated, but several things we look at during a visit are. Columbia Water & Light pays:
| Improvement | Rebate |
|---|---|
| Smart thermostat | up to $50 (or 100% of materials and install, whichever is less) |
| Duct insulation to R-13 or better | up to $300 (starting at R-12 or less) |
| Attic insulation, Attic Plus program | up to $500 (must reach R-50; home at least 1 year old) |
| Air-leakage reduction | up to $100 |
| Home Performance program total | $1,200 cap — the assessment has to come first |
Who should be on a service agreement?
- Owners of newer systems protecting a warranty and the efficiency they paid for
- Owners of older systems who want the failure found early rather than in a cold snap
- Heat pump owners, whose equipment runs year-round
- Landlords and property managers — Columbia is 48.7% owner-occupied, so tens of thousands of units are rentals; see property management HVAC
- Commercial buildings with rooftop units — see commercial HVAC
- Anyone with an allergy or dust complaint, where maintenance pairs with duct cleaning and indoor air quality work
What affects what a plan costs?
We do not publish plan pricing, because the agreement is built around your equipment. The variables:
- Number of systems at the property
- Equipment type — furnace and A/C, heat pump, ductless, geothermal or rooftop unit
- Accessibility — a basement furnace versus an attic air handler or a roof curb
- Residential or commercial, and how many visits the equipment warrants
- Filter type and size, including media cabinets
- Number of addresses under one agreement, for landlords and property managers
Where we service maintenance agreements
We cover Columbia and the surrounding county. In established Columbia neighborhoods like Benton-Stephens, Shepard Boulevard and Parkade, most of the equipment we maintain is mid-life — exactly when preventive service pays off. In Ashland, where the median home was built in 2006, agreements protect systems still under manufacturer warranty. And in Centralia, with 70.2% of homes on natural gas, the fall heating visit is the one nobody should skip. Related services: heating contractor services, A/C contractor services, furnace installation and heat pump installation.
Maintenance Plan FAQs
How often should HVAC equipment be serviced in Columbia?
Twice a year: the cooling system in spring and the heating system in fall. Columbia runs 5,024 heating degree days and 1,248 cooling degree days annually, so neither system gets a long off-season. A heat pump, which runs in both seasons, benefits most from the two-visit schedule.
What is included in a service agreement?
An annual agreement puts a spring cooling visit and a fall heating visit on the calendar and documents each one. The cooling visit covers coil condition, refrigerant charge verification, electrical components, condensate drain and safety switch, airflow and temperature split. The heating visit covers burner and flame sensor cleaning, heat exchanger inspection, gas pressure, safety controls, blower condition and temperature rise. Ask us for the current agreement details for your equipment.
Does maintenance affect my equipment warranty?
Usually, yes. Most manufacturers require documented annual maintenance as a condition of the parts warranty, and a denied warranty claim on a compressor or heat exchanger is an expensive way to learn that. A service agreement creates the paper trail along with the service itself.
Do you service equipment you didn't install?
Yes. We service all brands of heating and cooling equipment, residential and commercial, whether or not we installed the system. That includes gas furnaces, air conditioners, heat pumps, ductless systems and commercial rooftop units.
What actually goes wrong when maintenance is skipped?
The failures we see repeat themselves: condensate drains that plug and trip a safety switch or overflow, outdoor coils packed with cottonwood and grass clippings, weak run capacitors that finally fail on the first 95 degree afternoon, dirty burners and flame sensors that cause nuisance lockouts, and blower wheels loaded with dust that quietly cut airflow. Nearly all of it is cheaper to prevent than to repair.
Is a maintenance plan worth it on a new system?
It is arguably most valuable on a new system, because that is when the warranty documentation matters and when small commissioning issues surface. It also keeps a high-efficiency system operating at the efficiency you paid for, which matters if you selected equipment to reach a Columbia Water and Light rebate tier.
Do you offer maintenance agreements for commercial buildings and rentals?
Yes. We handle commercial and multi-unit work, including rooftop units and scheduled service across multiple addresses. Columbia is 48.7 percent owner-occupied, so a large share of the county's equipment sits in rental property where scheduled service prevents emergency calls at the worst possible moment.