Preventive maintenance services equipment on a fixed schedule. Predictive maintenance services it when measured condition says it is needed. A small commercial building usually does well with a solid preventive plan, and predictive monitoring adds value where downtime is costly. Climate Pros Tucson matches you with licensed pros who can set up either one.
What is preventive maintenance?
It is scheduled work whether or not anything looks wrong. Typical tasks are changing filters, cleaning coils, checking belts and electrical connections, testing controls and clearing condensate drains. You and the contractor agree on the visits in advance, and you keep a log.
Preventive plans are simple to budget and easy to audit. The downside is that a schedule can service a healthy part too early and miss one that fails between visits.
What is predictive maintenance?
It uses readings from the equipment to decide when to act. Examples are tracking motor amperage, supply and return temperatures, pressures, runtime and vibration, and watching for drift from normal. A rising amp draw on a compressor can flag trouble before it quits.
It needs sensors or regular logged readings, and someone who understands them. It costs more to set up. Each contractor prices it differently, so ask for a written scope and quote.
Which fits a Tucson building?
Cooling is the long season here, so the schedule should center on it. Tucson’s cooling degree days run about 2.6 times its heating degree days, the airport averages about 68 days a year at or above 100F, and the July normal low is 76.3F, so equipment gets little rest in summer.
| Question | Leans preventive | Leans predictive |
|---|---|---|
| A few rooftop units, small office or shop | Yes | Rarely needed |
| Downtime stops revenue or spoils goods | Add it | Yes |
| Many units or a central plant | Base plan | Yes, on critical units |
| Staff to read and act on data | Not needed | Required |
A hybrid works for many: schedule the basics before summer and trend a few key readings during it. A pre-summer visit is the anchor. See pre-summer AC tune-up checklist for Tucson and HVAC maintenance plan worth it in Tucson.
How do you keep records?
Keep a log of visits, findings, readings and parts. Dust matters in this climate, so record filter changes. See HVAC maintenance log for homeowners and deferred maintenance: what to fix first. For a small business see commercial HVAC for small businesses in Tucson.
Check any contractor’s license at roc.az.gov. See commercial HVAC, HVAC maintenance and the Tucson HVAC hub.
When to call us
Call (520) 353-2520 and we’ll match you with a licensed local pro.