A complete commercial HVAC PM checklist quarterly covers filters, belts, coils, controls, refrigerant pressures, and seasonal callouts specific to Michigan climate, and running it four times a year cuts emergency breakdown rates by roughly 40 percent compared to semi-annual PM. Samco Facilities Maintenance builds and executes quarterly PM programs for manufacturers, property managers, and healthcare operators across Southeast Michigan. Call (734) 838-6300 to put your facility on a real schedule.
Why Quarterly PM Beats Semi-Annual for Michigan Buildings
A lot of facility teams default to two PM visits a year because that is what most contracts quote. It is also what generates the most breakdown calls between visits. Michigan runs four distinct seasons, each of which hammers commercial HVAC equipment differently, and a semi-annual schedule almost always misses a season transition entirely.
Facilities across Wayne County and Oakland County that move to quarterly PM report fewer emergency dispatches and longer equipment life cycles. The math is straightforward. A quarterly visit in March catches economizer linkages frozen by a January cold snap before they stay stuck into cooling season. A quarterly visit in September catches condenser coil fouling before it pushes heating season equipment into overtime. Semi-annual schedules catch those problems months later, after they have already started costing money.
What does it cost? In Southeast Michigan, the difference between semi-annual and quarterly PM typically runs $0.02 to $0.04 per square foot per year. For a 60,000 square foot building in Dearborn, that is roughly $1,200 to $2,400. A single emergency compressor call that a quarterly visit would have prevented runs $3,000 to $8,000 before parts. The math favors quarterly PM for any facility with more than 20 tons of cooling or a commercial boiler.
The Full Quarterly Commercial HVAC PM Checklist
Here is what a quarterly commercial HVAC PM checklist quarterly actually covers, broken into four visit windows. Use this list to audit any proposal a contractor hands you.
Every quarterly visit, regardless of season, should include:
- Filter inspection and replacement (2-inch pleated minimum, MERV 8 for most commercial applications)
- Belt tension and condition check on all belt-driven air handlers and exhaust fans
- Blower and condenser fan motor amp draw against nameplate
- Refrigerant pressure log with superheat and subcooling readings
- Thermostat and BAS setpoint verification
- Condensate pan and drain inspection and flush
- Electrical connection torque check and contactor face condition
- Coil cleanliness visual, flag for wash if fouling exceeds 20 percent blockage
Beyond the base list, each quarter carries season-specific additions covered in the Michigan Angle section below. The base list alone takes a competent tech two to four hours per rooftop unit, not 45 minutes. If your current contractor is finishing a multi-unit building before lunch, they are skipping steps.
Here is what actually happens in the field. Eight out of ten economizers Samco technicians inspect in Livonia between January and March have a stuck damper linkage or a failed actuator. Not one of them threw a BAS alarm. The building ran, the economizer looked fine from the parking lot, and the facility manager had no idea the economizer was locked closed. That is a quarterly visit finding, not a breakdown call, which is exactly why the schedule matters.
The Michigan Angle: Seasonal Callouts Most Templates Skip
National PM templates skip Michigan. Sunbelt checklists do not include a January cold soak recovery check or a Great Lakes humidity correction for summer cooling loads. Michigan facilities need four season-specific additions stacked on top of the base quarterly list.
Q1 (January through March): Add a freeze stat function test, condensate P-trap integrity check after the Polar Vortex window, and a CSD-1 boiler testing reminder for any facility with a commercial boiler. Michigan requires CSD-1 testing annually, and Q1 is the right trigger since boilers are running at peak load.
Q2 (April through June): Add condenser coil cleaning, economizer actuator and linkage test for full range of motion, refrigerant charge verification before cooling season load hits, and a Consumers Energy or DTE demand rebate eligibility check for any upgraded equipment.
Q3 (July through September): Add a condenser fan motor temperature rise check under full load, an evaporator coil inspection for icing indicators, and a humidity log review for facilities in Wayne County and Washtenaw County where Great Lakes humidity pushes cooling loads above nameplate capacity.
Q4 (October through December): Add a freeze stat verification before first heat, heat exchanger crack inspection, gas valve operation test, and a capital planning flag for any equipment scoring below 60 percent remaining useful life heading into another Michigan winter.
How to Log PM Work So Warranties Stay Valid
Running the PM checklist is half the work. Documenting it correctly is the other half, and most facility teams underestimate how much documentation manufacturers require to honor warranty claims.
- Date-stamped visit report per unit. Not a building summary. Each rooftop unit, air handler, and boiler gets its own log entry with model number, serial number, and tech signature.
- Refrigerant log with EPA 608 tech credentials listed. EPA 608 Universal certification is required to purchase and handle refrigerant. Any PM report that does not list the tech’s certification number is a compliance gap.
- Manufacturer PM requirements cross-referenced. Most commercial HVAC warranties require quarterly PM for units above 10 tons. If the contract only covers semi-annual visits, the warranty may already be void.
- Capital planning section on every annual summary. Each unit should carry a remaining useful life estimate and a projected replacement cost so budget requests hit finance in Q4, not the week the unit fails.
- Deviation notes for deferred work. If a task was deferred because of production schedules or budget approval, write it down with a follow-up date. Deferred work that does not get logged does not get done.
A Troy property manager we have worked with since 2011 was almost denied a warranty claim on a failed compressor because the prior contractor kept building-level reports instead of unit-level reports. The manufacturer required unit-serial-number-specific PM logs. Samco now runs unit-level logs for that property as a standard deliverable on every visit.
How Samco Runs Quarterly PM for Southeast Michigan Facilities
Samco Facilities Maintenance has run commercial HVAC PM programs across Wayne, Oakland, Macomb, and Washtenaw counties since 1997. Our technicians hold EPA 608 Universal certification and NATE certification. We carry a BBB A+ rating and the manufacturer credentials required to keep chiller and VRF warranties intact.
Our quarterly PM process starts with a site walk where a senior tech inventories every piece of equipment, identifies CSD-1 boiler testing requirements, and produces a baseline equipment scorecard. From there, we issue a quarterly schedule timed to your building calendar so PM visits never fall inside a production window or a lease event. Every visit produces a unit-level report, a deviation log for any deferred items, and an annual capital planning recommendation in Q4. For manufacturers in Livonia, Sterling Heights, and Canton, we time our visits around production shifts so PM work happens during planned downtime.
To get on a quarterly schedule, call (734) 838-6300 or visit our contact page. Learn more about our preventive maintenance program and our full commercial HVAC service capabilities.
Frequently Asked Questions
What should a quarterly commercial HVAC PM checklist include?
A quarterly commercial HVAC PM checklist covers filter replacement, belt and motor checks, refrigerant pressure logs, condensate drain flush, electrical connection torque, coil cleanliness inspection, and BAS setpoint verification. In Michigan, each quarter adds seasonal callouts: freeze stat tests in Q1, condenser coil cleaning in Q2, humidity load checks in Q3, and heat exchanger inspection in Q4.
How often should I run PM on rooftop units in Michigan?
Quarterly PM is the right cadence for Michigan rooftop units above five tons. Michigan’s four-season climate creates four distinct failure modes across the year, and semi-annual visits miss at least one seasonal transition. Quarterly visits catch freeze damage, coil fouling, economizer failures, and refrigerant drift before each issue escalates into a breakdown.
Does my PM checklist need a CSD-1 boiler check?
Yes, if you have a commercial boiler in Michigan. The state requires annual CSD-1 testing. The right time to schedule it is Q1, when the boiler has been running at peak load and any combustion drift, pressure relief issues, or safety control faults are most likely to appear. A PM contractor who does not flag this on your checklist is not covering your full compliance exposure.
Can I get a downloadable commercial HVAC PM checklist?
Samco provides a site-specific quarterly PM checklist as part of every preventive maintenance agreement, built around your actual equipment inventory, model numbers, and Michigan seasonal callouts. A generic download will not match your equipment mix. Call (734) 838-6300 and a Samco tech will walk your facility and produce a checklist built for your building.
Ready to Put Your Facility on a Real PM Schedule?
If your current PM contract skips seasonal callouts, delivers building-level reports instead of unit-level logs, or cannot show you a CSD-1 boiler testing line item, you are not running a real PM program. Samco Facilities Maintenance will walk your facility, inventory your equipment, and build a quarterly PM schedule with a written task list, unit-level reporting, and capital planning built in. We serve manufacturers, property managers, and multi-site operators across Southeast Michigan from our Livonia, MI headquarters. Call (734) 838-6300 or visit our contact page to schedule a walkthrough. Explore our full service lineup and see why facility teams across Wayne and Oakland counties have trusted Samco since 1997.